├── LICENSE ├── README.md ├── db.json ├── nist811 ├── Acceleration.csv ├── Angle.csv ├── Area.csv ├── ElectricityAndMagnetism.csv ├── Energy.csv ├── FlowRate.csv ├── Force.csv ├── FuelConsumption.csv ├── Heat.csv ├── Length.csv ├── Luminosity.csv ├── Mass.csv ├── Power.csv ├── PressureAndStress.csv ├── Radiology.csv ├── TableInfo.md ├── TemperatureDelta.csv ├── Time.csv ├── Velocity.csv ├── Viscosity.csv └── Volume.csv └── schema.json /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2020 GhostWrench 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # unitdb 2 | A simple JSON database containing conversion factors and other information for 3 | a large number of measurement units 4 | 5 | ## Repository Structure 6 | 7 | * The db.json file contains all prefix and unit definitions 8 | * The schema.json file is a jsonschema that defines the structure of the 9 | db.json file 10 | * The nist811 folder contains .csv that contain conversion factors defined by 11 | NIST [more info](./nist811/TableInfo.md) 12 | 13 | ## db.json 14 | This file contains definitions for standard (SI) prefixes and measurement units 15 | (SI and non-SI). Each field is keyed by it's most common symbol. Prefixes are 16 | structured as in the following example: 17 | 18 | ```json 19 | { 20 | "m": { 21 | "scale": "1e-3", 22 | "name": "milli" 23 | } 24 | } 25 | ``` 26 | 27 | This tells us that the prefix "m" modifies a value by a multiple of 1e-3 and it's 28 | full name is "milli". 29 | 30 | Units are defined as in the following example: 31 | 32 | ```json 33 | { 34 | "gf": { 35 | "name": "Gram Force", 36 | "description": "Defined as the amount of force exerted by standard gravity on a 1 gram mass", 37 | "category": "force", 38 | "scale": "9.80665e-3", 39 | "dimensions": {"mass": 1, "length": 1, "time": -2}, 40 | "aliases": ["pond"] 41 | }, 42 | } 43 | ``` 44 | 45 | This tells us that the "gf" symbol is defined a Gram-Force, it has dimensionality 46 | (mass * length / time^2), and has a scale of 9.80665e-3 relative to the SI 47 | standard measure of force (the Newton). Common alternative symbols are in the 48 | aliases array. Note that scale values are implemented as strings rather than floating 49 | point literals because some units can be precisely defined with a mathematical 50 | expression. For example, the US Survey Foot is defined as `1200/3937` meters and a 51 | Revolution is defined as `2*pi` radians, both of which cannot be represented 52 | exactly in floating point. 53 | -------------------------------------------------------------------------------- /db.json: -------------------------------------------------------------------------------- 1 | { 2 | "$schema": "./schema.json", 3 | "prefixes": { 4 | "y": { 5 | "scale": "1e-24", 6 | "name": "yocto" 7 | }, 8 | "z": { 9 | "scale": "1e-21", 10 | "name": "zepto" 11 | }, 12 | "a": { 13 | "scale": "1e-18", 14 | "name": "atto" 15 | }, 16 | "f": { 17 | "scale": "1e-15", 18 | "name": "femto" 19 | }, 20 | "p": { 21 | "scale": "1e-12", 22 | "name": "pico" 23 | }, 24 | "n": { 25 | "scale": "1e-9", 26 | "name": "nano" 27 | }, 28 | "u": { 29 | "scale": "1e-6", 30 | "name": "micro" 31 | }, 32 | "μ": { 33 | "scale": "1e-6", 34 | "name": "micro" 35 | }, 36 | "µ": { 37 | "scale": "1e-6", 38 | "name": "micro" 39 | }, 40 | "mu": { 41 | "scale": "1e-6", 42 | "name": "micro" 43 | }, 44 | "mc": { 45 | "scale": "1e-6", 46 | "name": "micro" 47 | }, 48 | "m": { 49 | "scale": "1e-3", 50 | "name": "milli" 51 | }, 52 | "c": { 53 | "scale": "1e-2", 54 | "name": "centi" 55 | }, 56 | "d": { 57 | "scale": "1e-1", 58 | "name": "deci" 59 | }, 60 | "da": { 61 | "scale": "1e1", 62 | "name": "deca" 63 | }, 64 | "h": { 65 | "scale": "1e2", 66 | "name": "hecto" 67 | }, 68 | "k": { 69 | "scale": "1e3", 70 | "name": "kilo" 71 | }, 72 | "M": { 73 | "scale": "1e6", 74 | "name": "mega" 75 | }, 76 | "G": { 77 | "scale": "1e9", 78 | "name": "giga" 79 | }, 80 | "T": { 81 | "scale": "1e12", 82 | "name": "tera" 83 | }, 84 | "P": { 85 | "scale": "1e15", 86 | "name": "peta" 87 | }, 88 | "E": { 89 | "scale": "1e18", 90 | "name": "exa" 91 | }, 92 | "Z": { 93 | "scale": "1e21", 94 | "name": "zetta" 95 | }, 96 | "Y": { 97 | "scale": "1e24", 98 | "name": "yotta" 99 | }, 100 | "Ki": { 101 | "scale": "2^10", 102 | "name": "kibi" 103 | }, 104 | "Mi": { 105 | "scale": "2^20", 106 | "name": "mebi" 107 | }, 108 | "Gi": { 109 | "scale": "2^30", 110 | "name": "gibi" 111 | }, 112 | "Ti": { 113 | "scale": "2^40", 114 | "name": "tebi" 115 | }, 116 | "Pi": { 117 | "scale": "2^50", 118 | "name": "pebi" 119 | }, 120 | "Ei": { 121 | "scale": "2^60", 122 | "name": "exbi" 123 | }, 124 | "Zi": { 125 | "scale": "2^70", 126 | "name": "zebi" 127 | }, 128 | "Yi": { 129 | "scale": "2^80", 130 | "name": "yobi" 131 | } 132 | }, 133 | "units": { 134 | "1": { 135 | "name": "One", 136 | "description": "Unit non-dimensional quantity", 137 | "category": "unitless", 138 | "scale": "1", 139 | "dimensions": {} 140 | }, 141 | "%": { 142 | "name": "Percent", 143 | "description": "Non dimensional percent (100 % == 1)", 144 | "category": "unitless", 145 | "scale": "1e-2", 146 | "dimensions": {} 147 | }, 148 | "ppm": { 149 | "name": "Parts per Million", 150 | "description": "Unitless quantity defined as 1 / 10^6", 151 | "category": "unitless", 152 | "scale": "1e-6", 153 | "dimensions": {} 154 | }, 155 | "ppb": { 156 | "name": "Parts per Billion", 157 | "description": "Unitless quantity defined as 1 / 10^9", 158 | "category": "unitless", 159 | "scale": "1e-9", 160 | "dimensions": {} 161 | }, 162 | "ppt": { 163 | "name": "Parts per Trillion", 164 | "description": "Unitless quantity defined as 1 / 10^12", 165 | "category": "unitless", 166 | "scale": "1e-12", 167 | "dimensions": {} 168 | }, 169 | "g": { 170 | "name": "Gram", 171 | "description": "unit of mass defined as 1e-3 kg", 172 | "category": "mass", 173 | "scale": "1e-3", 174 | "dimensions": {"mass": 1} 175 | }, 176 | "Da" : { 177 | "name": "Dalton", 178 | "description": "Sometimes called an atomic mass unit, defined as 1/12 of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest", 179 | "category": "mass", 180 | "scale": "1.66053906660e-27", 181 | "dimensions": {"mass": 1}, 182 | "aliases": ["u", "AMU"] 183 | }, 184 | "grain": { 185 | "name": "Grain", 186 | "description": "Mass approximately equivalent to a single ideal seed of a cereal, in particular wheat or barley", 187 | "category": "mass", 188 | "scale": "6.479891e-5", 189 | "dimensions": {"mass": 1} 190 | }, 191 | "ozm": { 192 | "name": "Ounce", 193 | "description": "US and Imperial unit equal to 1/16 of a Pound Mass", 194 | "category": "mass", 195 | "scale": "2.8349523125e-2", 196 | "dimensions": {"mass": 1} 197 | }, 198 | "dram": { 199 | "name": "Dram", 200 | "description": "Unit of mass historically used by apothecaries equal to 1/16 of an ounce", 201 | "category": "mass", 202 | "scale": "1.7718451953125e-3", 203 | "dimensions": {"mass": 1} 204 | }, 205 | "lbm": { 206 | "name": "Pound", 207 | "description": "US and Imperial primary unit of mass", 208 | "category": "mass", 209 | "scale": "4.5359237e-1", 210 | "dimensions": {"mass": 1} 211 | }, 212 | "stone": { 213 | "name": "Stone", 214 | "description": "Imperial unit equal to 14 Pounds Mass", 215 | "category": "mass", 216 | "scale": "6.35029318", 217 | "dimensions": {"mass": 1} 218 | }, 219 | "sg": { 220 | "name": "Slug", 221 | "description": "US and Imperial unit defined as 1 lbf / Standard Gravity", 222 | "category": "mass", 223 | "scale": "1.45939029372064e1", 224 | "dimensions": {"mass": 1}, 225 | "aliases": ["slug"] 226 | }, 227 | "cwt": { 228 | "name": "Short Hundredweight", 229 | "description": "Typically used in the US, equal to 100 lbm", 230 | "category": "mass", 231 | "scale": "4.5359237e1", 232 | "dimensions": {"mass": 1} 233 | }, 234 | "dwt": { 235 | "name": "Short Pennyweight", 236 | "description": "From the weight of an English penny in the Middle Ages, equal to 24 grains or 1/20 of a troy ounce", 237 | "category": "mass", 238 | "scale": "1.55517384e-3", 239 | "dimensions": {"mass": 1} 240 | }, 241 | "uk_cwt": { 242 | "name": "Long Hundredweight", 243 | "description": "Typically used in the UK, equal to 8 stone", 244 | "category": "mass", 245 | "scale": "5.080234544e1", 246 | "dimensions": {"mass": 1} 247 | }, 248 | "ton": { 249 | "name": "Ton", 250 | "description": "US customary unit equal to 2000 lbm", 251 | "category": "mass", 252 | "scale": "9.0718474e2", 253 | "dimensions": {"mass": 1} 254 | }, 255 | "uk_ton": { 256 | "name": "UK Ton", 257 | "description": "English customary unit that is equal to 20 Long Hundredweight or 160 Stone", 258 | "category": "mass", 259 | "scale": "1.0160469088e3", 260 | "dimensions": {"mass": 1} 261 | }, 262 | "metric_ton": { 263 | "name": "Metric Ton", 264 | "description": "Sometimes seen as 'tonne', this mass equals 1000 kg", 265 | "category": "mass", 266 | "scale": "1e3", 267 | "dimensions": {"mass": 1}, 268 | "aliases": ["tonne"] 269 | }, 270 | "carat": { 271 | "name": "Carat", 272 | "description": "Equal to 200 mg, typically used to measure gemstones", 273 | "category": "mass", 274 | "scale": "2e-4", 275 | "dimensions": {"mass": 1} 276 | }, 277 | "assay_ton": { 278 | "name": "Assay Ton", 279 | "description": "Equal to 29 1/6 grams, often used to measure the ores of precious metals", 280 | "category": "mass", 281 | "scale": "2.9166666666666667e-2", 282 | "dimensions": {"mass": 1} 283 | }, 284 | "denier": { 285 | "name": "Denier", 286 | "description": "Linear density used in textiles, the linear density of a single strand of silk is approx. 1 denier", 287 | "category": "miscellaneous", 288 | "scale": "1.1111111111111112e-7", 289 | "dimensions": {"mass": 1, "length": -1} 290 | }, 291 | "tex": { 292 | "name": "Tex", 293 | "description": "Linear density equal to 1 g / km, mainly used for measuring fiber products", 294 | "category": "miscellaneous", 295 | "scale": "1e-6", 296 | "dimensions": {"mass": 1, "length": -1} 297 | }, 298 | "m": { 299 | "name": "Meter", 300 | "description": "SI standard unit for length", 301 | "category": "length", 302 | "scale": "1", 303 | "dimensions": {"length": 1} 304 | }, 305 | "ang": { 306 | "name": "Angstrom", 307 | "description": "Equal to 10^-10 meters, often used to express the size of atoms and molecules", 308 | "category": "length", 309 | "scale": "1e-10", 310 | "dimensions": {"length": 1} 311 | }, 312 | "picapt": { 313 | "name": "Pica Point", 314 | "description": "Used in typography, equal to 1/12 of a pica", 315 | "category": "length", 316 | "scale": "3.52777777777778e-4", 317 | "dimensions": {"length": 1} 318 | }, 319 | "pica": { 320 | "name": "Pica", 321 | "description": "Used in typography, equal to 1/6 of an inch", 322 | "category": "length", 323 | "scale": "4.23333333333333e-3", 324 | "dimensions": {"length": 1} 325 | }, 326 | "in": { 327 | "name": "Inch", 328 | "description": "US and Imperial unit of length equal to 1/12 of a foot", 329 | "category": "length", 330 | "scale": "2.54e-2", 331 | "dimensions": {"length": 1} 332 | }, 333 | "mil": { 334 | "name": "Mil", 335 | "description": "US and Imperial units for milli-inch, avoids a unit collision with the unit 'min'", 336 | "category": "length", 337 | "scale": "2.54e-5", 338 | "dimensions": {"length": 1} 339 | }, 340 | "ft": { 341 | "name": "Foot", 342 | "description": "Standard US and Imperial unit of length", 343 | "category": "length", 344 | "scale": "3.048e-1", 345 | "dimensions": {"length": 1} 346 | }, 347 | "yd": { 348 | "name": "Yard", 349 | "description": "US and Imperial unit of length equal to 3 foot", 350 | "category": "length", 351 | "scale": "9.144e-1", 352 | "dimensions": {"length": 1} 353 | }, 354 | "ell": { 355 | "name": "Ell", 356 | "description": "Formerly used in the english tayloring industry and defined as a yard and a quarter, now obsolete", 357 | "category": "length", 358 | "scale": "1.143", 359 | "dimensions": {"length": 1} 360 | }, 361 | "mi": { 362 | "name": "Mile", 363 | "description": "US and Imperial measure of distance equal to 5280 feet or 1,609.344 meters", 364 | "category": "length", 365 | "scale": "1.609344e3", 366 | "dimensions": {"length": 1} 367 | }, 368 | "survey_mi": { 369 | "name": "Survey Mile", 370 | "description": "US Customary unit equal to 5280 Survey Feet", 371 | "category": "length", 372 | "scale": "5280*(1200/3937)", 373 | "dimensions": {"length": 1} 374 | }, 375 | "nmi": { 376 | "name": "Nautical Mile", 377 | "description": "Approximately 1/60 of a degree of latitude, formally defined as 1852 meters", 378 | "category": "length", 379 | "scale": "1.852e3", 380 | "dimensions": {"length": 1}, 381 | "aliases": ["Nmi"] 382 | }, 383 | "league": { 384 | "name": "League", 385 | "description": "Originally represented the distance a person could walk in one day, the most recent common usage was in maritime where it is equal to 3 nautical miles", 386 | "category": "length", 387 | "scale": "5.556e3", 388 | "dimensions": {"length": 1} 389 | }, 390 | "ly": { 391 | "name": "Light Year", 392 | "description": "Represents the distance light travels in one year in a vacuum, used in astronomical scales", 393 | "category": "length", 394 | "scale": "9.4607304725808e15", 395 | "dimensions": {"length": 1} 396 | }, 397 | "parsec": { 398 | "name": "Parsec", 399 | "description": "Defined as 648 000 / pi astronomical units (au)", 400 | "category": "length", 401 | "scale": "3.08567758128155e16", 402 | "dimensions": {"length": 1} 403 | }, 404 | "survey_ft": { 405 | "name": "Survey Foot", 406 | "description": "Slightly different definition of foot defined as 1200/3937 meters instead of 0.3048 meters", 407 | "category": "length", 408 | "scale": "(1200/3937)", 409 | "dimensions": {"length": 1} 410 | }, 411 | "AU": { 412 | "name": "Astronomical Unit", 413 | "description": "Approximate distance from the Earth to the Sun", 414 | "category": "length", 415 | "scale": "1.495978707e11", 416 | "dimensions": {"length": 1} 417 | }, 418 | "chain": { 419 | "name": "Chain", 420 | "description": "US customary unit equal to 66 survey ft, sometimes the unit may be based on the internation foot rather than the survey foot changing the definition slightly", 421 | "category": "length", 422 | "scale": "66*(1200/3937)", 423 | "dimensions": {"length": 1} 424 | }, 425 | "link": { 426 | "name": "Link", 427 | "description": "US Customary unit of length equal to 1/100 of a chain", 428 | "category": "length", 429 | "scale": "(66/100)*(1200/3937)", 430 | "dimensions": {"length": 1} 431 | }, 432 | "rod": { 433 | "name": "Rod", 434 | "description": "US Customary unit of length equal to 1/4 of a chain", 435 | "category": "length", 436 | "scale": "(66/4)*(1200/3937)", 437 | "dimensions": {"length": 1} 438 | }, 439 | "furlong": { 440 | "name": "Furlong", 441 | "description": "US Customary unit of length equal to 10 chains", 442 | "category": "length", 443 | "scale": "660*(1200/3937)", 444 | "dimensions": {"length": 1} 445 | }, 446 | "fathom": { 447 | "name": "Fathom", 448 | "description": "Equal to 6 international foot, typically used to measure depth in maritime applications", 449 | "category": "length", 450 | "scale": "1.8288", 451 | "dimensions": {"length": 1} 452 | }, 453 | "us_fathom": { 454 | "name": "US Fathom", 455 | "description": "US Customary Fathom, appox. equal to 6 survey foot", 456 | "category": "length", 457 | "scale": "6*(1200/3937)", 458 | "dimensions": {"length": 1} 459 | }, 460 | "fermi": { 461 | "name": "Fermi", 462 | "description": "Equal to 10^-15 m, Used in nuclear physics and named after physicist Enrico Fermi who was one of the founders of the field", 463 | "category": "length", 464 | "scale": "1e-15", 465 | "dimensions": {"length": 1} 466 | }, 467 | "datamile": { 468 | "name": "Data Mile", 469 | "description": "A distance used in radar measurements equal to 6000 international feet", 470 | "category": "length", 471 | "scale": "1.8288e3", 472 | "dimensions": {"length": 1} 473 | }, 474 | "kayser": { 475 | "name": "Kayser/Wavenumber", 476 | "description": "Reciprocal of 1 cm, used in spectroscopy and chemistry to represent the number of wavelengths per cm", 477 | "category": "miscellaneous", 478 | "scale": "1e02", 479 | "dimensions": {"length": -1} 480 | }, 481 | "s": { 482 | "name": "Second", 483 | "description": "Approximately 1/86400 of a stellar day, formally defined based on the duration of 9 192 631 770 state transitions of the caesium-133 atom at 0 K", 484 | "category": "time", 485 | "scale": "1", 486 | "dimensions": {"time": 1}, 487 | "aliases": ["sec"] 488 | }, 489 | "min": { 490 | "name": "Minute", 491 | "description": "Defined as 60 seconds", 492 | "category": "time", 493 | "scale": "6e1", 494 | "dimensions": {"time": 1} 495 | }, 496 | "hr": { 497 | "name": "Hour", 498 | "description": "Defined as 60 minute", 499 | "category": "time", 500 | "scale": "3.6e3", 501 | "dimensions": {"time": 1} 502 | }, 503 | "day": { 504 | "name": "Day", 505 | "description": "Approximately equal to the amount of time for the earth to rotate on it's axis, formally defined as 24 hours", 506 | "category": "time", 507 | "scale": "8.64e4", 508 | "dimensions": {"time": 1} 509 | }, 510 | "week": { 511 | "name": "Week", 512 | "description": "Defined as 7 days", 513 | "category": "time", 514 | "scale": "6.048e5", 515 | "dimensions": {"time": 1} 516 | }, 517 | "fortnight": { 518 | "name": "Fortnight", 519 | "description": "Amount of time defined as 2 weeks or 14 days", 520 | "category": "time", 521 | "scale": "1.2096e6", 522 | "dimensions": {"time": 1} 523 | }, 524 | "yr": { 525 | "name": "Year", 526 | "description": "Approximately equal to the amount of time for the earth to make one orbit around the sun, formally defined as 365 days", 527 | "category": "time", 528 | "scale": "3.1536e7", 529 | "dimensions": {"time": 1} 530 | }, 531 | "shake": { 532 | "name": "Shake", 533 | "description": "Informal metric unit equal to 10^-8 seconds, often used in nuclear physics", 534 | "category": "time", 535 | "scale": "1e-8", 536 | "dimensions": {"time": 1} 537 | }, 538 | "K": { 539 | "name": "Kelvin", 540 | "description": "SI standard unit with 0 defined as absolute zero", 541 | "category": "temperature", 542 | "scale": "1", 543 | "dimensions": {"temperature": 1}, 544 | "aliases": ["deltaC"] 545 | }, 546 | "degF": { 547 | "name": "Degrees Fahrenheit", 548 | "description": "Temperature scale that is approximately 32 at the melting point of ice and 212 at the boiling point of water", 549 | "category": "temperature", 550 | "scale": "(5/9)", 551 | "dimensions": {"temperature": 1}, 552 | "offset": "273.15-(32*5/9)" 553 | }, 554 | "degC": { 555 | "name": "Degrees Celsius", 556 | "description": "Temperature unit with a similar scale to Kelvin, but with the 0 approximately defined as the melting point of ice", 557 | "category": "temperature", 558 | "scale": "1", 559 | "dimensions": {"temperature": 1}, 560 | "offset": "2.7315e2" 561 | }, 562 | "Ra": { 563 | "name": "Rankine", 564 | "description": "Units with the same scale as Fahrenheit, but with 0 at absolute 0", 565 | "category": "temperature", 566 | "scale": "(5/9)", 567 | "dimensions": {"temperature": 1}, 568 | "aliases": ["Rank", "deltaF"] 569 | }, 570 | "Reau": { 571 | "name": "Reaumur", 572 | "description": "Temperature scale that is approximately 0 at the melting point of ice and 80 at the boiling point of water", 573 | "category": "temperature", 574 | "scale": "1.25", 575 | "dimensions": {"temperature": 1}, 576 | "offset": "2.7315e2" 577 | }, 578 | "deltaReau": { 579 | "name": "Delta Reaumur", 580 | "description": "Change in temperature as measured in Reaumurs", 581 | "category": "temperature", 582 | "scale": "1.25", 583 | "dimensions": {"temperature": 1} 584 | }, 585 | "kph": { 586 | "name": "Kilometer per Hour", 587 | "description": "Velocity at which a kilometer is traveled every hour", 588 | "category": "velocity", 589 | "scale": "1000/3600", 590 | "dimensions": {"length": 1, "time": -1} 591 | }, 592 | "mph": { 593 | "name": "Mile per Hour", 594 | "description": "Velocity at which a mile is traveled every hour", 595 | "category": "velocity", 596 | "scale": "4.4704e-1", 597 | "dimensions": {"length": 1, "time": -1} 598 | }, 599 | "fps": { 600 | "name": "Feet per Second", 601 | "description": "Velocity where 1 foot is traveled every second", 602 | "category": "velocity", 603 | "scale": "3.048e-1", 604 | "dimensions": {"length": 1, "time": -1} 605 | }, 606 | "knot": { 607 | "name": "Knot", 608 | "description": "Velocity at which a Nautical mile is traveled every hour ", 609 | "category": "velocity", 610 | "scale": "5.14444444444444e-1", 611 | "dimensions": {"length": 1, "time": -1} 612 | }, 613 | "admkn": { 614 | "name": "Admirality Knot", 615 | "description": "Knot based on the old UK definition of a Nautical mile (1853.184 m)", 616 | "category": "velocity", 617 | "scale": "5.14773333333333e-1", 618 | "dimensions": {"length": 1, "time": -1} 619 | }, 620 | "c": { 621 | "name": "Speed of Light", 622 | "description": "velocity defined by how fast light travels in a vacuum", 623 | "category": "velocity", 624 | "scale": "2.99792458e8", 625 | "dimensions": {"length": 1, "time": -1} 626 | }, 627 | "grav": { 628 | "name": "Standard Gravity", 629 | "description": "Approximate acceleration of gravity at the surface of the earth", 630 | "category": "acceleration", 631 | "scale": "9.80665", 632 | "dimensions": {"length": 1, "time": -2} 633 | }, 634 | "galileo": { 635 | "name": "Galileo", 636 | "description": "CGS system standard unit for acceleration", 637 | "category": "acceleration", 638 | "scale": "1e-2", 639 | "dimensions": {"length": 1, "time": -2} 640 | }, 641 | "Pa": { 642 | "name": "Pascal", 643 | "description": "SI standard unit for pressure defined as 1 N/m^2", 644 | "category": "pressure", 645 | "scale": "1", 646 | "dimensions": {"mass": 1, "length": -1, "time": -2} 647 | }, 648 | "mHg": { 649 | "name": "Meter of Mercury", 650 | "description": "The pressure applied by 1 m of mercury at 1 standard gravity, more commonly used as mmHg or cmHg", 651 | "category": "pressure", 652 | "scale": "1.3332239e5", 653 | "dimensions": {"mass": 1, "length": -1, "time": -2} 654 | }, 655 | "mH2O": { 656 | "name": "Meter of Water", 657 | "description": "The pressure applied by 1 m of water at 1 standard gravity, more commonly used as mmH2O or cmH2O", 658 | "category": "pressure", 659 | "scale": "9.80665e3", 660 | "dimensions": {"mass": 1, "length": -1, "time": -2} 661 | }, 662 | "Torr": { 663 | "name": "Torr", 664 | "description": "Slightly different definition of mmHg, but very close to the same scale", 665 | "category": "pressure", 666 | "scale": "1.33322368421053e2", 667 | "dimensions": {"mass": 1, "length": -1, "time": -2} 668 | }, 669 | "psi": { 670 | "name": "Pound per Square Inch", 671 | "description": "US and Imperial unit of pressure defined as 1 lbf / in^2", 672 | "category": "pressure", 673 | "scale": "6.89475729316836e3", 674 | "dimensions": {"mass": 1, "length": -1, "time": -2} 675 | }, 676 | "atm": { 677 | "name": "Atmosphere", 678 | "description": "Approximately the mean air pressure at sea level", 679 | "category": "pressure", 680 | "scale": "1.01325e5", 681 | "dimensions": {"mass": 1, "length": -1, "time": -2} 682 | }, 683 | "bar": { 684 | "name": "Bar", 685 | "description": "Defined as 100 000 Pa, which is very close to 1 atmosphere", 686 | "category": "pressure", 687 | "scale": "1e5", 688 | "dimensions": {"mass": 1, "length": -1, "time": -2} 689 | }, 690 | "inHg": { 691 | "name": "Inch of Mercury", 692 | "description": "The pressure applied by 1 inch of mercury at 1 standard gravity", 693 | "category": "pressure", 694 | "scale": "3.3863886666667e3", 695 | "dimensions": {"mass": 1, "length": -1, "time": -2} 696 | }, 697 | "inH2O": { 698 | "name": "Inch of Water", 699 | "description": "The pressure applied by 1 inch of water at 1 standard gravity", 700 | "category": "pressure", 701 | "scale": "2.4908891e2", 702 | "dimensions": {"mass": 1, "length": -1, "time": -2} 703 | }, 704 | "ftHg": { 705 | "name": "Foot of Mercury", 706 | "description": "The pressure applied by 1 foot of mercury at 1 standard gravity", 707 | "category": "pressure", 708 | "scale": "4.0636664e4", 709 | "dimensions": {"mass": 1, "length": -1, "time": -2} 710 | }, 711 | "ftH2O": { 712 | "name": "Foot of Water", 713 | "description": "The pressure applied by 1 foot of water at 1 standard gravity", 714 | "category": "pressure", 715 | "scale": "2.98906692e3", 716 | "dimensions": {"mass": 1, "length": -1, "time": -2} 717 | }, 718 | "Ba": { 719 | "name": "Barye", 720 | "description": "CGS standard unit for pressure", 721 | "category": "pressure", 722 | "scale": "1e-1", 723 | "dimensions": {"mass": 1, "length": -1, "time": -2} 724 | }, 725 | "Pa-g": { 726 | "name": "Gauge Pascal", 727 | "description": "Pascal with a zero offset at atmospheric pressure", 728 | "category": "pressure", 729 | "scale": "1", 730 | "dimensions": {"mass": 1, "length": -1, "time": -2}, 731 | "offset": "1.01325e5" 732 | }, 733 | "bar-g": { 734 | "name": "Gauge Bar", 735 | "description": "Bar with a zero offset at atmospheric pressure", 736 | "category": "pressure", 737 | "scale": "1e5", 738 | "dimensions": {"mass": 1, "length": -1, "time": -2}, 739 | "offset": "1.01325e5" 740 | }, 741 | "psi-g": { 742 | "name": "Gauge PSI", 743 | "description": "psi with a zero offset at atmospheric pressure", 744 | "category": "pressure", 745 | "scale": "6.89475729316836e3", 746 | "dimensions": {"mass": 1, "length": -1, "time": -2}, 747 | "offset": "1.01325e5" 748 | }, 749 | "N": { 750 | "name": "Newton", 751 | "description": "SI standard unit for force defined as 1 kg m / s^2", 752 | "category": "force", 753 | "scale": "1", 754 | "dimensions": {"mass": 1, "length": 1, "time": -2} 755 | }, 756 | "dyn": { 757 | "name": "Dyne", 758 | "description": "CGS standard unit for force defined as 1 g [c]m / s^2", 759 | "category": "force", 760 | "scale": "1e-5", 761 | "dimensions": {"mass": 1, "length": 1, "time": -2} 762 | }, 763 | "gf": { 764 | "name": "Gram Force", 765 | "description": "Defined as the amount of force exerted by standard gravity on a 1 gram mass", 766 | "category": "force", 767 | "scale": "9.80665e-3", 768 | "dimensions": {"mass": 1, "length": 1, "time": -2}, 769 | "aliases": ["pond"] 770 | }, 771 | "lbf": { 772 | "name": "Pound Force", 773 | "description": "Defined as the amount of force exerted by standard gravity on a 1 lbm mass", 774 | "category": "force", 775 | "scale": "4.4482216152605", 776 | "dimensions": {"mass": 1, "length": 1, "time": -2} 777 | }, 778 | "ozf": { 779 | "name": "Ounce Force", 780 | "description": "Equal to 1/16 lbf", 781 | "category": "force", 782 | "scale": "2.78013850953781e-1", 783 | "dimensions": {"mass": 1, "length": 1, "time": -2} 784 | }, 785 | "pdl": { 786 | "name": "Poundal", 787 | "description": "Force unit in the foot-pound-second system equal to 1 lbm ft / s^2", 788 | "category": "force", 789 | "scale": "1.38254954376e-1", 790 | "dimensions": {"mass": 1, "length": 1, "time": -2} 791 | }, 792 | "ton-force": { 793 | "name": "Ton Force", 794 | "description": "Equal to 2000 lbf", 795 | "category": "force", 796 | "scale": "8.896443230521e3", 797 | "dimensions": {"mass": 1, "length": 1, "time": -2} 798 | }, 799 | "J": { 800 | "name": "Joule", 801 | "description": "SI standard unit for energy defined as 1 N m", 802 | "category": "energy", 803 | "scale": "1", 804 | "dimensions": {"mass": 1, "length": 2, "time": -2} 805 | }, 806 | "eV": { 807 | "name": "Electron Volt", 808 | "description": "Energy gain of an electron after passing through a 1 Volt potential", 809 | "category": "energy", 810 | "scale": "1.602176487e-19", 811 | "dimensions": {"mass": 1, "length": 2, "time": -2} 812 | }, 813 | "erg": { 814 | "name": "Erg", 815 | "description": "CGS standard unit of energy defined as 1 dyn cm ", 816 | "category": "energy", 817 | "scale": "1e-7", 818 | "dimensions": {"mass": 1, "length": 2, "time": -2} 819 | }, 820 | "cal": { 821 | "name": "Calorie", 822 | "description": "Based on the amount of energy needed to raise the temperature of 1 kg of water 1 degree Celsius, defined in The Fifth International Conference on the Properties of Steam (London, July 1956) 'International Table'", 823 | "category": "energy", 824 | "scale": "4.1868", 825 | "dimensions": {"mass": 1, "length": 2, "time": -2} 826 | }, 827 | "Cal": { 828 | "name": "Kilo-calorie", 829 | "description": "Commonly used to measure the energy in food in the US, equal to 1000 calories and often refered to as a 'calorie' rather than a kilo-calorie", 830 | "category": "energy", 831 | "scale": "4.1868e3", 832 | "dimensions": {"mass": 1, "length": 2, "time": -2} 833 | }, 834 | "BTU": { 835 | "name": "British Thermal Unit", 836 | "description": "Based on the amount of energy needed to raise the temperature of 1 lbm of water 1 degree Fahrenheit, defined in The Fifth International Conference on the Properties of Steam (London, July 1956) 'International Table'", 837 | "category": "energy", 838 | "scale": "1.05505585e3", 839 | "dimensions": {"mass": 1, "length": 2, "time": -2} 840 | }, 841 | "thm": { 842 | "name": "Therm", 843 | "description": "Unit of energy equal to 100 000 BTU, approximately the energy equivalent of burning 100 ft^3 of natural gas", 844 | "category": "energy", 845 | "scale": "1.05505585e8", 846 | "dimensions": {"mass": 1, "length": 2, "time": -2} 847 | }, 848 | "Wh": { 849 | "name": "Watt-hour", 850 | "description": "Amount of energy dissipated by 1 Watt source over an hour", 851 | "category": "energy", 852 | "scale": "3.6e3", 853 | "dimensions": {"mass": 1, "length": 2, "time": -2} 854 | }, 855 | "HPh": { 856 | "name": "Horse Power Hour", 857 | "description": "Amount of energy dissipated by a 1 HP source over an hour", 858 | "category": "energy", 859 | "scale": "2.68451953769617e6", 860 | "dimensions": {"mass": 1, "length": 2, "time": -2} 861 | }, 862 | "ft-lb": { 863 | "name": "Foot Pound-force", 864 | "description": "Defined as 1 ft x 1 lbf, typically used to describe torques rather than energy", 865 | "category": "energy", 866 | "scale": "1.3558179483314", 867 | "dimensions": {"mass": 1, "length": 2, "time": -2}, 868 | "aliases": ["ft-lbf"] 869 | }, 870 | "RSI": { 871 | "name": "R Value (SI)", 872 | "description": "Thermal insulation defined as 1 K m^2 / W", 873 | "category": "insulation", 874 | "scale": "1", 875 | "dimensions": {"mass": -1, "time": 3, "temperature": 1} 876 | }, 877 | "RIP": { 878 | "name": "R Value (Foot Pound)", 879 | "description": "Thermal insulation defined as 1 Ra ft^2 hr / BTU", 880 | "category": "insulation", 881 | "scale": "1.7611018368230189e-1", 882 | "dimensions": {"mass": -1, "time": 3, "temperature": 1} 883 | }, 884 | "clo": { 885 | "name": "Clothing", 886 | "description": "Thermal insulation unit used in clothing design, defined as the amount of insulation that allows a person at rest to maintain thermal equilibrium in an 21 degC, normally ventilated room", 887 | "category": "insulation", 888 | "scale": "1.55e-1", 889 | "dimensions": {"mass": -1, "time": 3, "temperature": 1} 890 | }, 891 | "tog": { 892 | "name": "Tog", 893 | "description": "Thermal insulation unit defined as exactly 0.1 K m^2 / W", 894 | "category": "insulation", 895 | "scale": "1e-1", 896 | "dimensions": {"mass": -1, "time": 3, "temperature": 1} 897 | }, 898 | "W": { 899 | "name": "Watt", 900 | "description": "SI standard unit for energy, defined as 1 J / s", 901 | "category": "power", 902 | "scale": "1", 903 | "dimensions": {"mass": 1, "length": 2, "time": -3} 904 | }, 905 | "PS": { 906 | "name": "Metric Horsepower", 907 | "description": "Defined as the amount of power to raise a mass of 75 kg against standard gravity over a distance of 1 meter in one second", 908 | "category": "power", 909 | "scale": "7.3549875e2", 910 | "dimensions": {"mass": 1, "length": 2, "time": -3} 911 | }, 912 | "HP": { 913 | "name": "Mechanical Horsepower", 914 | "description": "Defined as 33 000 ft lbf / min", 915 | "category": "power", 916 | "scale": "7.4569987158227e2", 917 | "dimensions": {"mass": 1, "length": 2, "time": -3} 918 | }, 919 | "P": { 920 | "name": "Poise", 921 | "description": "CGS unit for dynamic viscosity", 922 | "category": "miscellaneous", 923 | "scale": "1e-1", 924 | "dimensions": {"mass": 1, "length": -1, "time": -1} 925 | }, 926 | "rhe": { 927 | "name": "Rhe", 928 | "description": "CGS unit for fluidity, equal to exactly 1 P^-1", 929 | "category": "miscellaneous", 930 | "scale": "1e1", 931 | "dimensions": {"mass": -1, "length": 1, "time": 1} 932 | }, 933 | "St": { 934 | "name": "Stokes", 935 | "description": "CGS unit for kinematic viscosity", 936 | "category": "miscellaneous", 937 | "scale": "1e-4", 938 | "dimensions": {"length": 2, "time": -1} 939 | }, 940 | "L": { 941 | "name": "Liter", 942 | "description": "Volume defined as 1 [d]m^3 or 10^-3 m^3", 943 | "category": "volume", 944 | "scale": "1e-3", 945 | "dimensions": {"length": 3} 946 | }, 947 | "tsp": { 948 | "name": "Teaspoon", 949 | "description": "US Customary volume unit that is close to 5 mL", 950 | "category": "volume", 951 | "scale": "4.92892159375e-6", 952 | "dimensions": {"length": 3} 953 | }, 954 | "tspm": { 955 | "name": "Metric Teaspoon", 956 | "description": "Based on the US Teaspoon, but defined as exactly 5 mL", 957 | "category": "volume", 958 | "scale": "5e-6", 959 | "dimensions": {"length": 3} 960 | }, 961 | "tbs": { 962 | "name": "Tablespoon", 963 | "description": "US Customary volume unit that is defined as 3 tsp", 964 | "category": "volume", 965 | "scale": "1.478676478125e-5", 966 | "dimensions": {"length": 3} 967 | }, 968 | "fl_oz": { 969 | "name": "Fluid Ounce", 970 | "description": "US Customary volume unit that is defined as 2 tbs", 971 | "category": "volume", 972 | "scale": "2.95735295625e-5", 973 | "dimensions": {"length": 3} 974 | }, 975 | "uk_fl_oz": { 976 | "name": "UK Fluid Ounce", 977 | "description": "Imperial unit approximately equal to the volume of 1 avoirdupois ounce of water", 978 | "category": "volume", 979 | "scale": "2.84130625e-5", 980 | "dimensions": {"length": 3} 981 | }, 982 | "cup": { 983 | "name": "Cup", 984 | "description": "US Customary volume unit that is defined as 8 fluid ounces", 985 | "category": "volume", 986 | "scale": "2.365882365e-4", 987 | "dimensions": {"length": 3} 988 | }, 989 | "pt": { 990 | "name": "Pint", 991 | "description": "US Customary volume unit that is defined as 2 cups", 992 | "category": "volume", 993 | "scale": "4.73176473e-4", 994 | "dimensions": {"length": 3} 995 | }, 996 | "uk_pt": { 997 | "name": "UK Pint", 998 | "description": "Imperial volume unit defined as 20 imperial ounces", 999 | "category": "volume", 1000 | "scale": "5.6826125e-4", 1001 | "dimensions": {"length": 3} 1002 | }, 1003 | "qt": { 1004 | "name": "Quart", 1005 | "description": "US Customary volume unit that is defined as 2 pints", 1006 | "category": "volume", 1007 | "scale": "9.46352946e-4", 1008 | "dimensions": {"length": 3} 1009 | }, 1010 | "uk_qt": { 1011 | "name": "UK Quart", 1012 | "description": "Imperial volume unit defined as 2 UK pints", 1013 | "category": "volume", 1014 | "scale": "1.1365225e-3", 1015 | "dimensions": {"length": 3} 1016 | }, 1017 | "gal": { 1018 | "name": "Gallon", 1019 | "description": "US Customary volume unit that is defined as 4 quarts", 1020 | "category": "volume", 1021 | "scale": "3.785411784e-3", 1022 | "dimensions": {"length": 3} 1023 | }, 1024 | "uk_gal": { 1025 | "name": "UK Gallon", 1026 | "description": "Imperial volume unit defined as 4 UK quarts", 1027 | "category": "volume", 1028 | "scale": "4.54609e-3", 1029 | "dimensions": {"length": 3} 1030 | }, 1031 | "bushel": { 1032 | "name": "Bushel", 1033 | "description": "Very old unit of volume that is associated with agricultural production, about 2150.42 in^3", 1034 | "category": "volume", 1035 | "scale": "3.523907016688e-2", 1036 | "dimensions": {"length": 3} 1037 | }, 1038 | "bbl": { 1039 | "name": "Oil Barrel", 1040 | "description": "Defined internationally as 42 US Gallons, typically used in the oil industry", 1041 | "category": "volume", 1042 | "scale": "1.58987294928e-1", 1043 | "dimensions": {"length": 3}, 1044 | "aliases": ["oilbarrel"] 1045 | }, 1046 | "beerbarrel": { 1047 | "name": "US Beer Barrel", 1048 | "description": "Volume associated with beer trade in the US, equal to 31 US Gallons", 1049 | "category": "volume", 1050 | "scale": "1.17347765304e-1", 1051 | "dimensions": {"length": 3} 1052 | }, 1053 | "uk_beerbarrel": { 1054 | "name": "Imperial Beer Barrel", 1055 | "description": "Appoximate volume of a barrel used for transporting beer in the UK, equal to 36 imperial gallons", 1056 | "category": "volume", 1057 | "scale": "1.6365924e-1", 1058 | "dimensions": {"length": 3} 1059 | }, 1060 | "MTON": { 1061 | "name": "Measurement Ton", 1062 | "description": "Commonly used in the freight industry, equal to 40 ft^3", 1063 | "category": "volume", 1064 | "scale": "1.13267386368", 1065 | "dimensions": {"length": 3} 1066 | }, 1067 | "GRT": { 1068 | "name": "Gross Register Tonnage", 1069 | "description": "commonly used in the freight industry equal to 100 ft^3", 1070 | "category": "volume", 1071 | "scale": "2.8316846592", 1072 | "dimensions": {"length": 3} 1073 | }, 1074 | "gill": { 1075 | "name": "Gill", 1076 | "description": "US Customary unit of volume equal to 4 US fluid ounces", 1077 | "category": "volume", 1078 | "scale": "1.1829411825e-4", 1079 | "dimensions": {"length": 3} 1080 | }, 1081 | "uk_gill": { 1082 | "name": "UK Gill", 1083 | "description": "Imperial unit equal to 5 Imperial (UK) fluid ounces", 1084 | "category": "volume", 1085 | "scale": "1.420653125e-4", 1086 | "dimensions": {"length": 3} 1087 | }, 1088 | "peck": { 1089 | "name": "Peck", 1090 | "description": "US Customary unit for non-fluid volume, defined as 2 dry gallons", 1091 | "category": "volume", 1092 | "scale": "8.80976754172e-3", 1093 | "dimensions": {"length": 3} 1094 | }, 1095 | "dry_gal": { 1096 | "name": "Dry Gallon", 1097 | "description": "US Customary unit for non-fluid volume, defined as exactly 268.8025 cubic inches", 1098 | "category": "volume", 1099 | "scale": "4.40488377086e-3", 1100 | "dimensions": {"length": 3} 1101 | }, 1102 | "dry_qt": { 1103 | "name": "Dry Quart", 1104 | "description": "US Customary unit for non-fluid volume, defined as 1/4 of a dry gallon", 1105 | "category": "volume", 1106 | "scale": "1.101220942715e-3", 1107 | "dimensions": {"length": 3} 1108 | }, 1109 | "dry_pt": { 1110 | "name": "Dry Pint", 1111 | "description": "US Customary unit for non-fluid volume, defined as 1/8 of a dry gallon", 1112 | "category": "volume", 1113 | "scale": "5.506104713575e-4", 1114 | "dimensions": {"length": 3} 1115 | }, 1116 | "stere": { 1117 | "name": "Stere", 1118 | "description": "Equal to exactly 1 m^3, typically used to measure large quantities of firewood", 1119 | "category": "volume", 1120 | "scale": "1", 1121 | "dimensions": {"length": 3} 1122 | }, 1123 | "ar": { 1124 | "name": "Are", 1125 | "description": "Equal to 1/100 hectares or 100 m^2", 1126 | "category": "area", 1127 | "scale": "1e2", 1128 | "dimensions": {"length": 2} 1129 | }, 1130 | "morgen": { 1131 | "name": "Morgen", 1132 | "description": "Traditionally the area able to be plowed in a single day by a single bladed plow and an ox or horse, it now is approximately equal to 1/4 of a hectare", 1133 | "category": "area", 1134 | "scale": "2.5e3", 1135 | "dimensions": {"length": 2} 1136 | }, 1137 | "acre": { 1138 | "name": "Acre", 1139 | "description": "Traditionally defined as the amount of area that could be plowed in one day by a yoke of oxen, still in use in the US", 1140 | "category": "area", 1141 | "scale": "4.04687260987425e3", 1142 | "dimensions": {"length": 2}, 1143 | "aliases": ["us_acre"] 1144 | }, 1145 | "uk_acre": { 1146 | "name": "UK Acre", 1147 | "description": "Slightly different than the US Acre, used in the UK until 1995", 1148 | "category": "area", 1149 | "scale": "4.0468564224e3", 1150 | "dimensions": {"length": 2} 1151 | }, 1152 | "ha": { 1153 | "name": "Hectare", 1154 | "description": "Internationally used metric unit for measurement of the area of land, equal to 1000 m^3", 1155 | "category": "area", 1156 | "scale": "1e4", 1157 | "dimensions": {"length": 2} 1158 | }, 1159 | "barn": { 1160 | "name": "Barn", 1161 | "description": "Equal to 10^-28 m^2, originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions", 1162 | "category": "area", 1163 | "scale": "1e-28", 1164 | "dimensions": {"length": 2} 1165 | }, 1166 | "b": { 1167 | "name": "Bit", 1168 | "description": "Basic unit of information that can take one of 2 states (on/off, 0/1, high/low)", 1169 | "category": "information", 1170 | "scale": "1", 1171 | "dimensions": {"information": 1}, 1172 | "aliases": ["bit"] 1173 | }, 1174 | "B": { 1175 | "name": "Byte", 1176 | "description": "Equal to 8 bits of information, commonly used in modern computing architectures", 1177 | "category": "information", 1178 | "scale": "8", 1179 | "dimensions": {"information": 1}, 1180 | "aliases": ["byte"] 1181 | }, 1182 | "word": { 1183 | "name": "Word", 1184 | "description": "Equal to 16 bits or 2 bytes", 1185 | "category": "information", 1186 | "scale": "16", 1187 | "dimensions": {"information": 1} 1188 | }, 1189 | "dword": { 1190 | "name": "Double Word", 1191 | "description": "Equal to 32 bits, 4 bytes or 2 words", 1192 | "category": "information", 1193 | "scale": "32", 1194 | "dimensions": {"information": 1} 1195 | }, 1196 | "baud": { 1197 | "name": "Baud Rate", 1198 | "description": "Rate of data transmission equal to 1 bit / second", 1199 | "category": "information", 1200 | "scale": "1", 1201 | "dimensions": {"information": 1, "time": -1} 1202 | }, 1203 | "A": { 1204 | "name": "Ampere", 1205 | "description": "SI standard unit for electric current, equal to 1 C/s", 1206 | "category": "electricity and magnetism", 1207 | "scale": "1", 1208 | "dimensions": {"current": 1} 1209 | }, 1210 | "C": { 1211 | "name": "Coulomb", 1212 | "description": "SI standard unit for electric charge defined as the amount of charge of exactly 6.2415093e18 elementary charges", 1213 | "category": "electricity and magnetism", 1214 | "scale": "1", 1215 | "dimensions": {"current": 1, "time": 1} 1216 | }, 1217 | "Ah": { 1218 | "name": "Amp Hour", 1219 | "description": "Charge collected from 1 Amp over 1 hour", 1220 | "category": "electricity and magnetism", 1221 | "scale": "3.6e3", 1222 | "dimensions": {"current": 1, "time": 1} 1223 | }, 1224 | "e": { 1225 | "name": "Elementary Charge", 1226 | "description": "The electric charge carried by a single proton", 1227 | "category": "electricity and magnetism", 1228 | "scale": "1.602176634e-19", 1229 | "dimensions": {"current": 1, "time": 1} 1230 | }, 1231 | "V": { 1232 | "name": "Volt", 1233 | "description": "Derived SI unit for electric potential, can be defined as J/C", 1234 | "category": "electricity and magnetism", 1235 | "scale": "1", 1236 | "dimensions": {"mass": 1, "length": 2, "current": -1, "time": -3} 1237 | }, 1238 | "ohm": { 1239 | "name": "Ohm", 1240 | "description": "Derived SI unit for electrical resistance", 1241 | "category": "electricity and magnetism", 1242 | "scale": "1", 1243 | "dimensions": {"mass": 1, "length": 2, "current": -2, "time": -3} 1244 | }, 1245 | "F": { 1246 | "name": "Farad", 1247 | "description": "Derived SI unit of electrical capacitance", 1248 | "category": "electricity and magnetism", 1249 | "scale": "1", 1250 | "dimensions": {"time": 4, "current": 2, "length": -2, "mass": -1} 1251 | }, 1252 | "H": { 1253 | "name": "Henry", 1254 | "description": "Derived SI unit for inductance", 1255 | "category": "electricity and magnetism", 1256 | "scale": "1", 1257 | "dimensions": {"length": 2, "mass": 1, "time": -2, "current": -2} 1258 | }, 1259 | "S": { 1260 | "name": "Siemens", 1261 | "description": "Derived SI unit for electrical conductance, equal to 1 / ohm", 1262 | "category": "electricity and magnetism", 1263 | "scale": "1", 1264 | "dimensions": {"time": 3, "current": 2, "length": -2, "mass": -1}, 1265 | "aliases": ["mho"] 1266 | }, 1267 | "Wb": { 1268 | "name": "Weber", 1269 | "description": "SI unit for magnetic flux defined as 1 kg m^2 / (s^2 A)", 1270 | "category": "electricity and magnetism", 1271 | "scale": "1", 1272 | "dimensions": {"mass": 1, "length":2, "time": -2, "current": -1} 1273 | }, 1274 | "Mx": { 1275 | "name": "Maxwell", 1276 | "description": "CGS unit for magnetic flux defined as 1 g cm^2 / (s^2 A)", 1277 | "category": "electricity and magnetism", 1278 | "scale": "1e-8", 1279 | "dimensions": {"mass": 1, "length": 2, "time": -2, "current": -1} 1280 | }, 1281 | "T": { 1282 | "name": "Tesla", 1283 | "description": "SI unit for magnetic flux density defined as 1 Wb / m^2", 1284 | "category": "electricity and magnetism", 1285 | "scale": "1", 1286 | "dimensions": {"mass": 1, "current": -1, "time": -2} 1287 | }, 1288 | "Gs": { 1289 | "name": "Gauss", 1290 | "description": "CGS unit for magnetic flux density defined as 1 Mx / cm^2", 1291 | "category": "electricity and magnetism", 1292 | "scale": "1e-4", 1293 | "dimensions": {"mass": 1, "current": -1, "time": -2}, 1294 | "aliases": ["gs"] 1295 | }, 1296 | "Fr": { 1297 | "name": "Franklin", 1298 | "description": "Standard unit of electrical charge in the EMU-CGS units of measure", 1299 | "category": "electricity and magnetism", 1300 | "scale": "3.3356409519815207e-10", 1301 | "dimensions": {"current": 1, "time": 1} 1302 | }, 1303 | "Gi": { 1304 | "name": "Gilbert", 1305 | "description": "Obsolete unit used in EMU-CGS systems to measure magnetization, dimensionally equivalent to the Amp", 1306 | "category": "electricity and magnetism", 1307 | "scale": "7.957747e-1", 1308 | "dimensions": {"current": 1} 1309 | }, 1310 | "Oe": { 1311 | "name": "Oersted", 1312 | "description": "CGS unit of auxiliary magnetic field", 1313 | "category": "electricity and magnetism", 1314 | "scale": "1000/(4*pi)", 1315 | "dimensions": {"current": 1, "length": -1} 1316 | }, 1317 | "mol": { 1318 | "name": "Mole", 1319 | "description": "SI standard unit for an amount of substance, defined as exactly 6.02214076e23 elementary entities (usually molecules)", 1320 | "category": "substance", 1321 | "scale": "1", 1322 | "dimensions": {"substance": 1} 1323 | }, 1324 | "molar": { 1325 | "name": "Molar Concentration", 1326 | "description": "Amount of substance per Liter of solution", 1327 | "category": "substance", 1328 | "scale": "1e3", 1329 | "dimensions": {"substance": 1, "length": -3}, 1330 | "aliases": ["M"] 1331 | }, 1332 | "kat": { 1333 | "name": "Katal", 1334 | "description": "Unit of catalytic activity, defined as 1 mol / sec", 1335 | "category": "substance", 1336 | "scale": "1", 1337 | "dimensions": {"substance": 1, "time": -1} 1338 | }, 1339 | "U": { 1340 | "name": "Enzyme", 1341 | "description": "Unit of catalytic activity, defined as 1 [u]mol / min", 1342 | "category": "substance", 1343 | "scale": "1.6666666666666667e-8", 1344 | "dimensions": {"substance": 1, "time": -1} 1345 | }, 1346 | "cd": { 1347 | "name": "Candela", 1348 | "description": "SI standard unit for luminous intensity in a given direction defined by taking the fixed numerical value of the luminous efficacy of monochromatic radiation of frequency 540e12 Hz", 1349 | "category": "luminosity", 1350 | "scale": "1", 1351 | "dimensions": {"luminosity": 1} 1352 | }, 1353 | "lm": { 1354 | "name": "Lumen", 1355 | "description": "SI derived unit of luminous flux, a measure of the total quantity of visible light emitted by a source. 1 lm = 1 cd sr", 1356 | "category": "luminosity", 1357 | "scale": "1", 1358 | "dimensions": {"luminosity": 1} 1359 | }, 1360 | "lx": { 1361 | "name": "Lux", 1362 | "description": "SI derived unit of illuminance, measuring luminous flux per unit area. 1 lx = 1 lm/m^2)", 1363 | "category": "luminosity", 1364 | "scale": "1", 1365 | "dimensions": {"luminosity": 1, "length": -2} 1366 | }, 1367 | "footcandle": { 1368 | "name": "Footcandle", 1369 | "description": "", 1370 | "category": "luminosity", 1371 | "scale": "1/(0.3048 ^ 2)", 1372 | "dimensions": {"luminosity": 1, "length": -2} 1373 | }, 1374 | "footlambert": { 1375 | "name": "Footlambert", 1376 | "description": "Non-SI unit of illuminance or light intensity. 1 footcandle = 1 lm / ft^2", 1377 | "category": "luminosity", 1378 | "scale": "(1/pi)/(0.3048 ^ 2)", 1379 | "dimensions": {"luminosity": 1, "length": -2} 1380 | }, 1381 | "lambert": { 1382 | "name": "Lambert", 1383 | "description": "Non-SI unit of luminance. 1 lambert = 1/π cd / cm^2", 1384 | "category": "luminosity", 1385 | "scale": "(1/pi)*10000", 1386 | "dimensions": {"luminosity": 1, "length": -2} 1387 | }, 1388 | "phot": { 1389 | "name": "Phot", 1390 | "description": "CGS unit of illuminance", 1391 | "category": "luminosity", 1392 | "scale": "1e4", 1393 | "dimensions": {"luminosity": 1, "length": -2} 1394 | }, 1395 | "stilb": { 1396 | "name": "Stilb", 1397 | "description": "CGS unit of luminance", 1398 | "category": "luminosity", 1399 | "scale": "1e4", 1400 | "dimensions": {"luminosity": 1, "length": -2} 1401 | }, 1402 | "rad": { 1403 | "name": "Radian", 1404 | "description": "Defined as the ratio of the radius of a circular arc to the radius of the arc, typically used to describe angles", 1405 | "category": "rotation", 1406 | "scale": "1", 1407 | "dimensions": {} 1408 | }, 1409 | "sr": { 1410 | "name": "Steradians", 1411 | "description": "A 'square radian' is a unit of solid angle analogous to the radian, a solid angle of 1 sr projected onto a unit sphere will have unit area", 1412 | "category": "rotation", 1413 | "scale": "1", 1414 | "dimensions": {} 1415 | }, 1416 | "rev": { 1417 | "name": "Revolution", 1418 | "description": "Angle describing one full revolution around an axis", 1419 | "category": "rotation", 1420 | "scale": "2*pi", 1421 | "dimensions": {} 1422 | }, 1423 | "deg": { 1424 | "name": "Degree", 1425 | "description": "Angle measurement equal to 1/360 of a revolution", 1426 | "category": "rotation", 1427 | "scale": "(1/180)*pi", 1428 | "dimensions": {} 1429 | }, 1430 | "arcmin": { 1431 | "name": "Arc Minute", 1432 | "description": "Angle measurement defined as 1/60 of a degree", 1433 | "category": "rotation", 1434 | "scale": "(1/10800)*pi", 1435 | "dimensions": {} 1436 | }, 1437 | "arcsec": { 1438 | "name": "Arc Second", 1439 | "description": "Angle measurement defined as 1/60 of a arc minue", 1440 | "category": "rotation", 1441 | "scale": "(1/648000)*pi", 1442 | "dimensions": {} 1443 | }, 1444 | "rpm": { 1445 | "name": "Revolutions per Minute", 1446 | "description": "Rotational frequency describing the number of revolution around an axis in a minute", 1447 | "category": "rotation", 1448 | "scale": "(2*pi)/60", 1449 | "dimensions": {"time": -1} 1450 | }, 1451 | "Hz": { 1452 | "name": "Hertz", 1453 | "description": "Frequency defined as 1 (cycle or rotation) / sec", 1454 | "category": "miscellaneous", 1455 | "scale": "2*pi", 1456 | "dimensions": {"time": -1} 1457 | }, 1458 | "Bq": { 1459 | "name": "Becquerel", 1460 | "description": "SI derived unit for radiation activity", 1461 | "category": "radiology", 1462 | "scale": "1", 1463 | "dimensions": {"time": -1} 1464 | }, 1465 | "Gy": { 1466 | "name": "Gray", 1467 | "description": "SI derived unit for radiation absorbed dose", 1468 | "category": "radiology", 1469 | "scale": "1", 1470 | "dimensions": {"length": 2, "time": -2} 1471 | }, 1472 | "Sv": { 1473 | "name": "Sievert", 1474 | "description": "SI unit for radiation equivalent dose, although dimensionally equivalent to Gy, it also includes a weighting function for types of radiation effects on human cells, and is thus not exactly equal", 1475 | "category": "radiology", 1476 | "scale": "1", 1477 | "dimensions": {"length": 2, "time": -2} 1478 | }, 1479 | "R": { 1480 | "name": "Rontgen", 1481 | "description": "Conventional unit for radiation exposure", 1482 | "category": "radiology", 1483 | "scale": "2.58e-4", 1484 | "dimensions": {"current": 1, "time": 1, "mass": -1} 1485 | }, 1486 | "RAD": { 1487 | "name": "Radiation Absorbed Dose", 1488 | "description": "Conventional unit for radiation absorbed dose", 1489 | "category": "radiology", 1490 | "scale": "1e-2", 1491 | "dimensions": {"length": 2, "time": -2} 1492 | }, 1493 | "rem": { 1494 | "name": "Roentgen Equivalent Man", 1495 | "description": "Conventional unit for radiation equivalent dose", 1496 | "category": "radiology", 1497 | "scale": "1e-2", 1498 | "dimensions": {"length": 2, "time": -2} 1499 | }, 1500 | "Ci": { 1501 | "name": "Curie", 1502 | "description": "Conventional unit for radiation activity", 1503 | "category": "radiology", 1504 | "scale": "3.7e10", 1505 | "dimensions": {"time": -1} 1506 | } 1507 | } 1508 | } 1509 | -------------------------------------------------------------------------------- /nist811/Acceleration.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | grav (Standard Gravity), m / s^2, 9.80665e+00, true 3 | ft / s^2, m / s^2, 3.048e-01, true 4 | galileo, m / s^2, 1.0e-02, true 5 | in / s^2, m / s^2, 2.54e-02, true 6 | -------------------------------------------------------------------------------- /nist811/Angle.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | deg, rad, 1.745329e-02, true 3 | gon (grade), rad, 1.570796e-02, false 4 | mil (angular mil), rad, 9.817477e-04, false 5 | arcmin, rad, 2.908882e-04, true 6 | rev, rad, 6.283185e+00, true 7 | arcsec, rad, 4.848137e-06, true 8 | -------------------------------------------------------------------------------- /nist811/Area.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | acre, m^2, 4.046873e+03, true 3 | ar, m^2, 1.0e+02, true 4 | barn, m^2, 1.0e-28, true 5 | circular_mil, m^2, 5.067075e-10, false 6 | ft^4, m^4, 8.630975e-03, true 7 | ha (hectare), m^2, 1.0e+04, true 8 | in^4, m^4, 4.162314e-07, true 9 | ft^2, m^2, 9.290304e-02, true 10 | in^2, m^2, 6.4516e-04, true 11 | mi^2, m^2, 2.589988e+06, true 12 | survey_mi^2, [k]m^2, 2.589998e+00, true 13 | yd^2, m^2, 8.361274e-01, true 14 | -------------------------------------------------------------------------------- /nist811/ElectricityAndMagnetism.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | Fr (statcoulomb / franklin), C, 3.335641e-10, true 3 | gamma, T, 1.0e-09, false 4 | Gs, T, 1.0e-04, true 5 | Gi (Gilbert), A, 7.957747e-01, true 6 | Mx, Wb, 1.0e-08, true 7 | mho, S, 1.0e+00, true 8 | Oe (Oersted), A / m, 7.957747e+01, true 9 | ohm [c]m, ohm m, 1.0e-02, true 10 | ohm circular_mil / ft, ohm m, 1.662426e-09, false 11 | ohm circular_mil / ft, ohm [m]m^2 / m, 1.662426e-03, false 12 | -------------------------------------------------------------------------------- /nist811/Energy.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | BTU, J, 1.055056e+03, true 3 | cal, J, 4.1868e+00, true 4 | eV, J, 1.602177e-19, true 5 | erg, J, 1.0e-07, true 6 | ft pdl (foot poundal), J, 4.214011e-02, true 7 | ft lbf, J, 1.355818e+00, true 8 | [k]W hr, [M]J, 3.6e+00, true 9 | W hr, J, 3.6e+03, true 10 | W s, J, 1.0e+00, true -------------------------------------------------------------------------------- /nist811/FlowRate.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | ft^3 / min, m^3 / s, 4.719474e-04, true 3 | ft^3 / s, m^3 / s, 2.831685e-02, true 4 | in^3 / min, m^3 / s, 2.731177e-07, true 5 | yd^3 / min, m^3 / s, 1.274258e-02, true 6 | gal / day, m^3 / s, 4.381264e-08, true 7 | gal / min, m^3 / s, 6.309020e-05, true 8 | -------------------------------------------------------------------------------- /nist811/Force.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | dyn, N, 1.0e-05, true 3 | [k]gf (kilogram-force), N, 9.80665e+00, true 4 | [k]pond, N, 9.80665e+00, true 5 | [k]lbf (kip), N, 4.448222e+03, true 6 | [k]lbf, [k]N, 4.448222e+00, true 7 | ozf, N, 2.780139e-01, true 8 | pdl (poundal), N, 1.382550e-01, true 9 | lbf, N, 4.448222e+00, true 10 | lbf / lbm, N / [k]g, 9.80665e+00, true 11 | ton-force, N, 8.896443e+03, true 12 | lbf / ft, N / m, 1.459390e+01, true 13 | lbf / in, N / m, 1.751268e+02, true 14 | dyn [c]m, N m, 1.0e-07, true 15 | [k]pond m, N m, 9.80665e+00, true 16 | ozf in, N m, 7.061552e-03, true 17 | ozf in, [m]N m, 7.061552e+00, true 18 | lbf ft, N m, 1.355818e+00, true 19 | lbf in, N m, 1.129848e-01, true 20 | lbf ft / in, N m / m, 5.337866e+01, true 21 | lbf in / in, N m / m, 4.448222e+00, true 22 | -------------------------------------------------------------------------------- /nist811/FuelConsumption.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | gal / HP hr, m^3 / J, 1.410089e-09, true 3 | mi / gal, m / m^3, 4.251437e+05, true 4 | mi / gal, [k]m / L, 4.251437e-01, true 5 | lbm / HP hr, [k]g / J, 1.689659e-07, true 6 | -------------------------------------------------------------------------------- /nist811/Heat.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | BTU / ft^3, J / m^3, 3.725895e+04, true 3 | BTU / lbm, J / [k]g, 2.326e+03, true 4 | cal / g, J / [k]g, 4.1868e+03, true 5 | BTU / hr ft^2 deltaF, W / m^2 K, 5.678263e+00, true 6 | BTU / s ft^2 deltaF, W / m^2 K, 2.044175e+04, true 7 | BTU / ft^2 hr, W / m^2, 3.154591e+00, true 8 | BTU / ft^2 s, W / m^2, 1.135653e+04, true 9 | BTU / deltaF, J / K, 1.899101e+03, true 10 | BTU / Ra, J / K, 1.899101e+03, true 11 | BTU / hr, W, 2.930711e-01, true 12 | BTU / s, W, 1.055056e+03, true 13 | BTU / lbm deltaF, J / [k]g K, 4.1868e+03, true 14 | BTU / lbm Ra, J / [k]g K, 4.1868e+03, true 15 | cal / g deltaC, J / [k]g K, 4.1868e+03, true 16 | cal / g K, J / [k]g K, 4.1868e+03, true 17 | BTU ft / hr ft^2 deltaF, W / m K, 1.730735e+00, true 18 | BTU in / hr ft^2 deltaF, W / m K, 1.442279e-01, true 19 | BTU in / s ft^2 deltaF, W / m K, 5.192204e+02, true 20 | clo (clothing), m^2 K / W, 1.55e-01, true 21 | deltaF hr ft^2 / BTU, m^2 K / W, 1.761102e-01, true 22 | deltaF hr / BTU, K / W, 1.895634e+00, true 23 | deltaF s / BTU, K / W, 5.265651e-04, true 24 | deltaF hr ft^2 / BTU in, m K / W, 6.933472e+00, true 25 | -------------------------------------------------------------------------------- /nist811/Length.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | ang, m, 1.0e-10, true 3 | AU, m, 1.495979e+11, true 4 | chain, m, 2.011684e+01, true 5 | us_fathom, m, 1.828804e+00, true 6 | fermi, m, 1.0e-15, true 7 | ft, m, 3.048e-01, true 8 | survey_ft, m, 3.048006e-01, true 9 | in, m, 2.54e-02, true 10 | kayser, m^-1, 1e+02, true 11 | ly, m, 9.46073e+15, true 12 | [u]in, m, 2.54e-08, true 13 | mi, m, 1.609344e+03, true 14 | survey_mi, m, 1.609347e+03, true 15 | Nmi (nautical mile), m, 1.852e+03, true 16 | parsec, m, 3.085678e+16, true 17 | pica, m, 4.233333e-03, true 18 | picapt (picapoint), m, 3.527778e-04, true 19 | rod, m, 5.029210e+00, true 20 | yd, m, 9.144e-01, true 21 | -------------------------------------------------------------------------------- /nist811/Luminosity.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | cd / in^2, cd / m^2, 1.550003e+03, true 3 | footcandle, lx, 1.076391e+01, true 4 | footlambert, cd / m^2, 3.426259e+00, true 5 | lambert, cd / m^2, 3.183099e+03, true 6 | lm / ft^2, lx, 1.076391e+01, true 7 | phot, lx, 1.0e+04, true 8 | stilb, cd / m^2, 1.0e+04, true -------------------------------------------------------------------------------- /nist811/Mass.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | carat, [k]g, 2.0e-04, true 3 | grain, [k]g, 6.479891e-05, true 4 | uk_cwt (long hundredweight), [k]g, 5.080235e+01, true 5 | cwt (short hundredweight), [k]g, 4.535924e+01, true 6 | [k]gf s^2 / m, [k]g, 9.80665e+00, true 7 | ozm, [k]g, 2.834952e-02, true 8 | dwt (pennyweight), [k]g, 1.555174e-03, true 9 | lbm, [k]g, 4.535924e-01, true 10 | lbm ft^2, [k]g m^2, 4.214011e-02, true 11 | lbm in^2, [k]g m^2, 2.926397e-04, true 12 | slug, [k]g, 1.459390e+01, true 13 | assay_ton, [k]g, 2.916667e-02, true 14 | uk_ton (long ton), [k]g, 1.016047e+03, true 15 | metric_ton, [k]g, 1.0e+03, true 16 | tonne (metric ton), [k]g, 1.0e+03, true 17 | ton (short ton), [k]g, 9.071847e+02, true 18 | ozm / ft^2, [k]g / m^2, 3.051517e-01, true 19 | ozm / in^2, [k]g / m^2, 4.394185e+01, true 20 | ozm / yd^2, [k]g / m^2, 3.390575e-02, true 21 | lbm / ft^2, [k]g / m^2, 4.882428e+00, true 22 | lbm / in^2, [k]g / m^2, 7.030696e+02, true 23 | denier, [k]g / m, 1.111111e-07, true 24 | lbm / ft, [k]g / m, 1.488164e+00, true 25 | lbm / in, [k]g / m, 1.785797e+01, true 26 | lbm / yd, [k]g / m, 4.960546e-01, true 27 | tex, [k]g / m, 1.0e-06, true 28 | lbm / hr, [k]g / s, 1.259979e-04, true 29 | lbm / min, [k]g / s, 7.559873e-03, true 30 | lbm / s, [k]g / s, 4.535924e-01, true 31 | ton / hr, [k]g / s, 2.519958e-01, true 32 | grain / gal, [k]g / m^3, 1.711806e-02, true 33 | g / [c]m^3, [k]g / m^3, 1.0e+03, true 34 | ozm / in^3, [k]g / m^3, 1.729994e+03, true 35 | ozm / uk_gal, [k]g / m^3, 6.236023e+00, true 36 | ozm / uk_gal, g / L, 6.236023e+00, true 37 | ozm / gal, [k]g / m^3, 7.489152e+00, true 38 | ozm / gal, g / L, 7.489152e+00, true 39 | lbm / ft^3, [k]g / m^3, 1.601846e+01, true 40 | lbm / in^3, [k]g / m^3, 2.767990e+04, true 41 | lbm / yd^3, [k]g / m^3, 5.932764e-01, true 42 | lbm / uk_gal, [k]g / m^3, 9.977637e+01, true 43 | lbm / uk_gal, [k]g / L, 9.977637e-02, true 44 | lbm / gal, [k]g / m^3, 1.198264e+02, true 45 | lbm / gal, [k]g / L, 1.198264e-01, true 46 | slug / ft^3, [k]g / m^3, 5.153788e+02, true 47 | uk_ton / yd^3, [k]g / m^3, 1.328939e+03, true 48 | ton / yd^3, [k]g / m^3, 1.186553e+03, true 49 | -------------------------------------------------------------------------------- /nist811/Power.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | erg / s, W, 1.0e-07, true 3 | ft lbf / hr, W, 3.766161e-04, true 4 | ft lbf / min, W, 2.259697e-02, true 5 | ft lbf / s, W, 1.355818e+00, true 6 | HP, W, 7.456999e+02, true 7 | erg / [c]m^2 s, W / m^2, 1.0e-03, true 8 | W / [c]m^2, W / m^2, 1.0e+04, true 9 | W / in^2, W / m^2, 1.550003e+03, true 10 | -------------------------------------------------------------------------------- /nist811/PressureAndStress.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | atm, Pa, 1.01325e+05, true 3 | atm, [k]Pa, 1.01325e+02, true 4 | bar, Pa, 1.0e+05, true 5 | bar, [k]Pa, 1.0e+02, true 6 | [c]mHg, Pa, 1.333224e+03, true 7 | [c]mH2O, Pa, 9.80665e+01, true 8 | dyn / [c]m^2, Pa, 1.0e-01, true 9 | ftHg, Pa, 4.063666e+04, true 10 | ftH2O, Pa, 2.989067e+03, true 11 | gf / [c]m^2 (gram-force / cm^2), Pa, 9.80665e+01, true 12 | inHg, Pa, 3.386389e+03, true 13 | inH2O, Pa, 2.490889e+02, true 14 | [k]gf / [c]m^2, Pa, 9.80665e+04, true 15 | [k]gf / m^2, Pa, 9.80665e+00, true 16 | [k]gf / [m]m^2, Pa, 9.80665e+06, true 17 | [k]lbf / in^2 (kip / in^2), Pa, 6.894757e+06, true 18 | [m]bar, Pa, 1.0e+02, true 19 | [m]mHg, Pa, 1.333224e+02, true 20 | [m]mH2O, Pa, 9.80665e+00, true 21 | pdl / ft^2, Pa, 1.488164e+00, true 22 | lbf / ft^2, Pa, 4.788026e+01, true 23 | lbf / in^2, Pa, 6.894757e+03, true 24 | psi, Pa, 6.894757e+03, true 25 | Torr, Pa, 1.333224e+02, true 26 | -------------------------------------------------------------------------------- /nist811/Radiology.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | Ci, Bq, 3.7e+10, true 3 | RAD (radiation absorbed dose), Gy, 1.0e-02, true 4 | rem, Sv, 1.0e-02, true 5 | R, C / [k]g, 2.58e-04, true 6 | -------------------------------------------------------------------------------- /nist811/TableInfo.md: -------------------------------------------------------------------------------- 1 | The following tables in CSV format are an abbreviated version of the NIST 2 | ["Special Publication 811: NIST Guide to the SI" Appendix B.9](https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b9). 3 | They are converted to a more easily machine readable format and are used for 4 | verifying conversion accuracy of units in the db.json file. 5 | 6 | They have the following basic format: 7 | 8 | | Convert From | Convert To | Multipy By | Supported | 9 | | ------------ | ---------- | ---------- | --------------- | 10 | | ft / s | m / s | 3.048e-01 | true | 11 | 12 | Which means that (1 ft / s) approximately equals (3.048e-01 m / s). The last 13 | row indicates if the conversion is supported by the units located in the 14 | `unitdata/db.json` database file. Non obvious or confusing units may have a 15 | full name included in parenthesis to avoid confusion. For example: 16 | 17 | | Convert From | Convert To | Multipy By | Supported | 18 | | ------------- | ---------- | ---------- | --------------- | 19 | | Gal (Galileo) | \[c\]m / s^2 | 1.0 | false | 20 | 21 | It is assumed that most people would easily confuse this unit with the more 22 | common "Gallon". So special notation is helpful. 23 | 24 | -------------------------------------------------------------------------------- /nist811/TemperatureDelta.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | deltaC, K, 1.0e+00, true 3 | deltaF, deltaC, 5.555556e-01, true 4 | deltaF, K, 5.555556e-01, true 5 | Ra, K, 5.555556e-01, true 6 | -------------------------------------------------------------------------------- /nist811/Time.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | day, s, 8.64e+04, true 3 | sidereal_day, s, 8.616409e+04, false 4 | hr, s, 3.6e+03, true 5 | sidereal_hr, s, 3.590170e+03, false 6 | min, s, 6.0e+01, true 7 | sidereal_min, s, 5.983617e+01, false 8 | sidereal_s, s, 9.972696e-01, false 9 | shake, s, 1.0e-08, true 10 | yr, s, 3.1536e+07, true 11 | sidereal_yr, s, 3.155815e+07, false 12 | tropical_yr, s, 3.155693e+07, false 13 | -------------------------------------------------------------------------------- /nist811/Velocity.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | ft / hr, m / s, 8.466667e-05, true 3 | ft / min, m / s, 5.08e-03, true 4 | ft / s, m / s, 3.048e-01, true 5 | in / s, m / s, 2.54e-02, true 6 | [k]m / hr, m / s, 2.777778e-01, true 7 | knot, m / s, 5.144444e-01, true 8 | mi / hr, m / s, 4.4704e-01, true 9 | mi / hr, [k]m / hr, 1.609344e+00, true 10 | mi / min, m / s, 2.68224e+01, true 11 | mi / s, m / s, 1.609344e+03, true 12 | rpm, rad / s, 1.047198e-01, true 13 | rev / min, rad / s, 1.047198e-01, true 14 | -------------------------------------------------------------------------------- /nist811/Viscosity.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | [c]P, Pa s, 1.0e-03, true 3 | P (poise), Pa s, 1.0e-01, true 4 | pdl s / ft^2, Pa s, 1.488164e+00, true 5 | lbf s / ft^2, Pa s, 4.788026e+01, true 6 | lbf s / in^2, Pa s, 6.894757e+03, true 7 | lbm / ft hr, Pa s, 4.133789e-04, true 8 | lbm / ft s, Pa s, 1.488164e+00, true 9 | rhe, 1 / Pa s, 1.0e+01, true 10 | slug / ft s, Pa s, 4.788026e+01, true 11 | [c]St (centistokes), m^2 /s, 1.0e-06, true 12 | ft^2 / s, m^2 / s, 9.290304e-02, true 13 | St (stokes), m^2 / s, 1.0e-04, true 14 | -------------------------------------------------------------------------------- /nist811/Volume.csv: -------------------------------------------------------------------------------- 1 | Convert From, Convert To, Multiply By, Supported 2 | acre survey_ft, m^3, 1.233489e+03, true 3 | bbl, m^3, 1.589873e-01, true 4 | bushel, m^3, 3.523907e-02, true 5 | cord, m^3, 3.624556e+00, false 6 | ft^3, m^3, 2.831685e-02, true 7 | in^3, m^3, 1.638706e-05, true 8 | mi^3, m^3, 4.168182e+09, true 9 | yd^3, m^3, 7.645549e-01, true 10 | cup, m^3, 2.365882E-04, true 11 | fl_oz, m^3, 2.957353e-05, true 12 | uk_gal, m^3, 4.54609e-03, true 13 | gal, m^3, 3.785412e-03, true 14 | uk_gill, m^3, 1.420653e-04, true 15 | gill, m^3, 1.182941e-04, true 16 | L, m^3, 1.0e-03, true 17 | uk_fl_oz, m^3, 2.841306e-05, true 18 | peck, m^3, 8.809768e-03, true 19 | dry_pt, m^3, 5.506105e-04, true 20 | pt (liquid), m^3, 4.731765e-04, true 21 | dry_qt, m^3, 1.101221e-03, true 22 | qt (liquid), m^3, 9.463529e-04, true 23 | stere (st), m^3, 1.0e+00, true 24 | tbs, m^3, 1.478676e-05, true 25 | tsp, m^3, 4.928922e-06, true 26 | GRT (register_ton), m^3, 2.831685e+00, true 27 | -------------------------------------------------------------------------------- /schema.json: -------------------------------------------------------------------------------- 1 | { 2 | "$schema": "http://json-schema.org/draft-07/schema", 3 | "description": "Schema for the unit database JSON file", 4 | "type": "object", 5 | "required": [ 6 | "prefixes", 7 | "units" 8 | ], 9 | "additionalProperties": {"type": "string"}, 10 | "properties": { 11 | "prefixes": { 12 | "description": "Prefixes that are prepended to units to modify magnitude", 13 | "type": "object", 14 | "additionalProperties": {"$ref": "#/definitions/prefix"} 15 | }, 16 | "units": { 17 | "description": "Unit definitions with information needed to use", 18 | "type": "object", 19 | "additionalProperties": {"$ref": "#/definitions/unit"} 20 | } 21 | }, 22 | "definitions": { 23 | "prefix": { 24 | "type": "object", 25 | "required": [ 26 | "name", 27 | "scale" 28 | ], 29 | "properties": { 30 | "name": {"type": "string"}, 31 | "scale": {"type": "string"} 32 | } 33 | }, 34 | "unit": { 35 | "description": "Schema for a single unit", 36 | "type": "object", 37 | "required": [ 38 | "name", 39 | "description", 40 | "scale", 41 | "dimensions", 42 | "category" 43 | ], 44 | "properties": { 45 | "name": {"type": "string"}, 46 | "description": {"type": "string"}, 47 | "scale": {"type": "string"}, 48 | "category": { 49 | "type": "string", 50 | "enum": [ 51 | "unitless", 52 | "mass", 53 | "length", 54 | "area", 55 | "volume", 56 | "time", 57 | "temperature", 58 | "velocity", 59 | "acceleration", 60 | "pressure", 61 | "force", 62 | "power", 63 | "energy", 64 | "insulation", 65 | "electricity and magnetism", 66 | "information", 67 | "substance", 68 | "luminosity", 69 | "rotation", 70 | "radiology", 71 | "miscellaneous" 72 | ] 73 | }, 74 | "offset": {"type": "string"}, 75 | "aliases": { 76 | "type": "array", 77 | "items": {"type": "string"} 78 | }, 79 | "dimensions": { 80 | "type": "object", 81 | "additionalProperties": false, 82 | "properties": { 83 | "mass": {"type": "integer"}, 84 | "length": {"type": "integer"}, 85 | "time": {"type": "integer"}, 86 | "temperature": {"type": "integer"}, 87 | "current": {"type": "integer"}, 88 | "substance": {"type": "integer"}, 89 | "luminosity": {"type": "integer"}, 90 | "information": {"type": "integer"} 91 | } 92 | } 93 | } 94 | } 95 | } 96 | } 97 | --------------------------------------------------------------------------------