[[unit]]
id = "bar"
name = "Bar"
aliases = []
dim = [1, -1, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "100000/1"
offset = "0/1"
exactness = "defined"
prefixes = "si"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (bar = 100 kPa)"
note = "bar = 1e5 Pa by definition"
[[unit]]
id = "atm"
name = "Standard atmosphere"
aliases = []
dim = [1, -1, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "101325/1"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (standard atmosphere); 10th CGPM (1954), Resolution 4"
note = "standard atmosphere = 101325 Pa exactly"
[[unit]]
id = "g_n"
name = "Standard gravity"
aliases = []
dim = [0, 1, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "196133/20000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (standard acceleration of gravity); 3rd CGPM (1901), Declaration (980.665 cm/s^2)"
note = "standard acceleration of gravity 9.80665 m/s^2 exactly"
[[unit]]
id = "lbf"
name = "Pound-force"
aliases = []
dim = [1, 1, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "8896443230521/2000000000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (pound-force)"
note = "lbf = lb * g_n = 0.45359237 kg * 9.80665 m/s^2"
[[unit]]
id = "psi"
name = "Pound-force per square inch"
aliases = []
dim = [1, -1, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "8896443230521/1290320000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (pound-force per square inch)"
note = "psi = lbf/in^2 = (0.45359237 * 9.80665) / 0.0254^2 Pa, derived exactly from lb, g_n and in"
[[unit]]
id = "mmHg"
name = "Millimetre of mercury"
aliases = []
dim = [1, -1, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "26664477483/200000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (conventional millimeter of mercury); NIST SP 811, Chapter 5, Table 9 (1 mmHg ~ 133.322 Pa)"
note = "conventional mercury density 13595.1 kg/m^3 * g_n * 1 mm = 133.322387415 Pa; distinct from torr"
[[unit]]
id = "torr"
name = "Torr"
aliases = []
dim = [1, -1, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "20265/152"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (torr = 101325/760 Pa)"
note = "torr = atm/760 exactly; differs from mmHg by about 1.4e-7 relative"
[[unit]]
id = "cal_th"
name = "Thermochemical calorie"
aliases = []
dim = [1, 2, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "523/125"
offset = "0/1"
exactness = "defined"
prefixes = "si"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (calorie_th)"
note = "thermochemical calorie = 4.184 J exactly"
[[unit]]
id = "cal_IT"
name = "International Table calorie"
aliases = []
dim = [1, 2, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "10467/2500"
offset = "0/1"
exactness = "defined"
prefixes = "si"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (calorie_IT); 5th International Conference on the Properties of Steam (1956)"
note = "International Table calorie = 4.1868 J exactly"
[[unit]]
id = "Btu_IT"
name = "International Table British thermal unit"
aliases = []
dim = [1, 2, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "52752792631/50000000"
offset = "0/1"
exactness = "defined"
prefixes = "si"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (Btu_IT)"
note = "Btu_IT = cal_IT/g * lb * (5/9 K) = 4.1868 * 453.59237 / 1.8 J = 1055.05585262 J, derived exactly"
[[unit]]
id = "Btu_th"
name = "Thermochemical British thermal unit"
aliases = []
dim = [1, 2, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "23722880951/22500000"
offset = "0/1"
exactness = "defined"
prefixes = "si"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (Btu_th)"
note = "Btu_th = cal_th/g * lb * (5/9 K) = 4.184 * 453.59237 / 1.8 J, derived exactly (about 1054.3503 J)"
[[unit]]
id = "hp_mech"
name = "Mechanical horsepower"
aliases = []
dim = [1, 2, -3, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "37284993579113511/50000000000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (horsepower, 550 ft lbf/s)"
note = "mechanical horsepower = 550 ft lbf/s = 550 * 0.3048 * 0.45359237 * 9.80665 W"
[[unit]]
id = "hp_metric"
name = "Metric horsepower"
aliases = []
dim = [1, 2, -3, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "588399/800"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (horsepower, metric = 7.354 988 E+02 W; 75 kgf m/s with kgf = 9.806 65 N)"
note = "metric horsepower = 75 kgf m/s = 75 * 9.80665 W = 735.49875 W"
[[unit]]
id = "in"
name = "Inch"
aliases = []
dim = [0, 1, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "127/5000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "International yard and pound agreement (1959); NIST SP 811 (2008), Appendix B"
note = "inch = 0.0254 m exactly"
[[unit]]
id = "ft"
name = "Foot"
aliases = []
dim = [0, 1, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "381/1250"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "International yard and pound agreement (1959); NIST SP 811 (2008), Appendix B"
note = "international foot = 0.3048 m exactly"
[[unit]]
id = "yd"
name = "Yard"
aliases = []
dim = [0, 1, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "1143/1250"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "International yard and pound agreement (1959); NIST SP 811 (2008), Appendix B"
note = "international yard = 0.9144 m exactly"
[[unit]]
id = "mi"
name = "Mile"
aliases = []
dim = [0, 1, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "201168/125"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "International yard and pound agreement (1959); NIST SP 811 (2008), Appendix B"
note = "international mile = 5280 ft = 1609.344 m; the US survey mile is mi_us_survey"
[[unit]]
id = "nmi"
name = "Nautical mile"
aliases = []
dim = [0, 1, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "1852/1"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (nautical mile); BIPM SI Brochure, 9th ed. (2019), ch. 4, Table 8 and note (k) (1st Extraordinary International Hydrographic Conference, 1929)"
note = "international nautical mile = 1852 m exactly"
[[unit]]
id = "ft_us_survey"
name = "US survey foot"
aliases = []
dim = [0, 1, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "1200/3937"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (foot, U.S. survey); NIST SP 811 (2008), Appendix B.6 (1200/3937 m)"
note = "US survey foot = 1200/3937 m; deprecated by NIST and NGS from 2023-01-01, kept for legacy data"
[[unit]]
id = "mi_us_survey"
name = "US survey mile"
aliases = []
dim = [0, 1, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "6336000/3937"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (mile, U.S. statute)"
note = "US statute mile = 5280 US survey feet"
[[unit]]
id = "lb"
name = "Pound"
aliases = []
dim = [1, 0, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "45359237/100000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "International yard and pound agreement (1959); NIST SP 811 (2008), Appendix B"
note = "avoirdupois pound = 0.45359237 kg exactly"
[[unit]]
id = "oz_av"
name = "Avoirdupois ounce"
aliases = []
dim = [1, 0, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "45359237/1600000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "International yard and pound agreement (1959); NIST SP 811 (2008), Appendix B"
note = "avoirdupois ounce = lb/16 (mass)"
[[unit]]
id = "oz_troy"
name = "Troy ounce"
aliases = []
dim = [1, 0, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "19439673/625000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (ounce, troy or apothecary)"
note = "troy ounce = 480 grains, grain = 64.79891 mg, so 31.1034768 g exactly"
[[unit]]
id = "ton_short"
name = "Short ton"
aliases = []
dim = [1, 0, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "45359237/50000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (ton, short, 2000 lb)"
note = "short ton = 2000 lb = 907.18474 kg"
[[unit]]
id = "ton_long"
name = "Long ton"
aliases = []
dim = [1, 0, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "317514659/312500"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (ton, long, 2240 lb)"
note = "long ton = 2240 lb = 1016.0469088 kg"
[[unit]]
id = "gal_us"
name = "US liquid gallon"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "473176473/125000000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (gallon, U.S. = 3.785 412 E-03 m^3); NIST Handbook 44, Appendix C (231 in^3)"
note = "US liquid gallon = 231 in^3 = 3.785411784 L exactly"
[[unit]]
id = "gal_imp"
name = "Imperial gallon"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "454609/100000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "UK Weights and Measures Act 1985, Schedule 1, Part VI (4.54609 dm^3); NIST SP 811 (2008), Appendix B (gallon, Canadian and U.K.)"
note = "imperial gallon = 4.54609 L exactly"
[[unit]]
id = "pt_us"
name = "US liquid pint"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "473176473/1000000000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (pint, U.S. liquid)"
note = "US liquid pint = gal_us/8; the dry pint is a different unit and not included"
[[unit]]
id = "pt_imp"
name = "Imperial pint"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "454609/800000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "UK Weights and Measures Act 1985, Schedule 1, Part IV (pint = 0.568 261 25 dm^3)"
note = "imperial pint = gal_imp/8"
[[unit]]
id = "lbmol"
name = "Pound-mole"
aliases = []
dim = [0, 0, 0, 0, 0, 1, 0]
kind = "plain"
shape = "linear"
factor = "45359237/100000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "derived from the pound definition (International yard and pound agreement (1959); NIST SP 811 (2008), Appendix B); standard process-engineering convention"
note = "pound-mole = 1 lb expressed in grams as a number of moles = 453.59237 mol exactly; kmol is k + mol"
[[unit]]
id = "degF"
name = "Degree Fahrenheit"
symbol = "°F"
aliases = ["°F"]
dim = [0, 0, 0, 0, 1, 0, 0]
kind = "absolute_temperature"
shape = "affine"
factor = "5/9"
offset = "45967/180"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (degree Fahrenheit)"
note = "K = (degF + 459.67) * 5/9; absolute temperature"
[[unit]]
id = "degR"
name = "Degree Rankine"
symbol = "°R"
aliases = ["°R"]
dim = [0, 0, 0, 0, 1, 0, 0]
kind = "absolute_temperature"
shape = "linear"
factor = "5/9"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (degree Rankine)"
note = "K = degR * 5/9; absolute temperature, linear (zero at absolute zero)"
[[unit]]
id = "delta_degF"
name = "Degree Fahrenheit difference"
symbol = "Δ°F"
aliases = ["Δ°F"]
dim = [0, 0, 0, 0, 1, 0, 0]
kind = "temperature_difference"
shape = "linear"
factor = "5/9"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (degree Fahrenheit, temperature interval)"
note = "temperature difference of 1 degF = 5/9 K"
[[unit]]
id = "delta_degR"
name = "Degree Rankine difference"
symbol = "Δ°R"
aliases = ["Δ°R"]
dim = [0, 0, 0, 0, 1, 0, 0]
kind = "temperature_difference"
shape = "linear"
factor = "5/9"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (degree Rankine, temperature interval)"
note = "temperature difference of 1 degR = 5/9 K"
[[unit]]
id = "week"
name = "Week"
aliases = ["wk", "w"]
dim = [0, 0, 1, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "604800/1"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "ISO 8601-1:2019 (week of 7 days); BIPM SI Brochure, 9th ed. (2019), ch. 4, Table 8 (day = 86 400 s)"
note = "week = 7 d"
[[unit]]
id = "yr_common"
name = "Common year"
aliases = []
dim = [0, 0, 1, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "31536000/1"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (year, 365 days)"
note = "common year = 365 d; the bare words yr and year are ambiguous and rejected"
[[unit]]
id = "yr_julian"
name = "Julian year"
aliases = []
dim = [0, 0, 1, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "31557600/1"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "IAU Style Manual (1989), Julian year a = 365.25 d; BIPM SI Brochure, 9th ed. (2019), ch. 4, Table 8 (day = 86 400 s)"
note = "Julian year = 365.25 d, the astronomical year; the bare words yr and year are ambiguous and rejected"
[[unit]]
id = "ly"
name = "Light year"
aliases = []
dim = [0, 1, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "9460730472580800/1"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "IAU Style Manual (1989) (light year = c x Julian year); BIPM SI Brochure, 9th ed. (2019), ch. 2, Table 1 (c = 299 792 458 m/s)"
note = "light year = 299 792 458 m/s * 31 557 600 s = 9 460 730 472 580 800 m"
[[unit]]
id = "acre_int"
name = "International acre"
aliases = []
dim = [0, 2, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "316160658/78125"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B.6 (160 rd^2 = 1 acre = 43 560 ft^2); International yard and pound agreement (1959)"
note = "acre = 43 560 ft^2 with the international foot (4046.8564224 m^2); acre_us_survey differs by about 2 ppm; the bare word acre is ambiguous and rejected"
[[unit]]
id = "acre_us_survey"
name = "US survey acre"
aliases = []
dim = [0, 2, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "62726400000/15499969"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (acre, based on U.S. survey foot); NIST SP 811 (2008), Appendix B.6"
note = "acre = 43 560 ft_us_survey^2 (about 4046.8726 m^2)"
[[unit]]
id = "kn"
name = "Knot"
aliases = []
dim = [0, 1, -1, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "463/900"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (knot = nautical mile per hour); BIPM SI Brochure, 9th ed. (2019), ch. 4, Table 8 and note (k)"
note = "knot = 1 nmi/h = 1852/3600 m/s"
[[unit]]
id = "fl_oz_us"
name = "US fluid ounce"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "473176473/16000000000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (fluid ounce, U.S. = 2.957 353 E-05 m^3); NIST Handbook 44, Appendix C (1 gallon = 128 fluid ounces)"
note = "US fluid ounce = gal_us/128 = 29.5735295625 mL"
[[unit]]
id = "cup_us"
name = "US cup"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "473176473/2000000000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (cup, U.S. liquid measure)"
note = "US cup = gal_us/16 = 8 fl_oz_us = 236.5882365 mL"
[[unit]]
id = "qt_us"
name = "US liquid quart"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "473176473/500000000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (quart, U.S. liquid)"
note = "US liquid quart = gal_us/4"
[[unit]]
id = "tbsp_us"
name = "US tablespoon"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "473176473/32000000000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (tablespoon, U.S.)"
note = "US tablespoon = fl_oz_us/2 = gal_us/256; the bare word tbsp is ambiguous and rejected"
[[unit]]
id = "tsp_us"
name = "US teaspoon"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "157725491/32000000000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (teaspoon, U.S.)"
note = "US teaspoon = tbsp_us/3 = gal_us/768; the bare word tsp is ambiguous and rejected"
[[unit]]
id = "fl_oz_imp"
name = "Imperial fluid ounce"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "454609/16000000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "UK Weights and Measures Act 1985, Schedule 1, Part VI (fluid ounce = 1/20 pint)"
note = "imperial fluid ounce = gal_imp/160 = 28.4130625 mL"
[[unit]]
id = "qt_imp"
name = "Imperial quart"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "454609/400000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "UK Weights and Measures Act 1985, Schedule 1, Part VI (quart = 1/4 gallon)"
note = "imperial quart = gal_imp/4 = 1.1365225 L"
[[unit]]
id = "grain"
name = "Grain"
aliases = []
dim = [1, 0, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "6479891/100000000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (grain, 1/7000 pound avoirdupois)"
note = "grain = lb/7000 = 64.79891 mg"
[[unit]]
id = "carat"
name = "Metric carat"
aliases = []
dim = [1, 0, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "1/5000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (carat, metric = 2.0 E-04 kg)"
note = "metric carat = 200 mg"
[[unit]]
id = "erg"
name = "Erg"
aliases = []
dim = [1, 2, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "1/10000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (erg)"
note = "erg = 1e-7 J (CGS)"
[[unit]]
id = "dyn"
name = "Dyne"
aliases = []
dim = [1, 1, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "1/100000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (dyne)"
note = "dyne = 1e-5 N (CGS)"
[[unit]]
id = "kgf"
name = "Kilogram-force"
aliases = []
dim = [1, 1, -2, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "196133/20000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (kilogram-force)"
note = "kilogram-force = 1 kg * g_n = 9.80665 N"
[[unit]]
id = "grad"
name = "Gradian"
aliases = ["gon"]
dim = [0, 0, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "1/200 pi"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (grade); ISO 80000-3:2019 (gon)"
note = "grad (gon) = pi/200 rad, exact (ADR-018); 100 grad = 90 deg"
[[unit]]
id = "P"
name = "Poise"
aliases = ["poise"]
dim = [1, -1, -1, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "1/10"
offset = "0/1"
exactness = "defined"
prefixes = "si"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B.8 (poise = 1.0 E-01 Pa s)"
note = "dynamic viscosity, CGS; 1 P = 1 g/(cm s) = 0.1 Pa s; cP is the SI prefix c on P"
[[unit]]
id = "St"
name = "Stokes"
aliases = ["stokes"]
dim = [0, 2, -1, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "1/10000"
offset = "0/1"
exactness = "defined"
prefixes = "si"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B.8 (stokes = 1.0 E-04 m^2/s)"
note = "kinematic viscosity, CGS; 1 St = 1 cm^2/s; cSt is the SI prefix c on St"
[[unit]]
id = "bbl"
name = "Oil barrel"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "plain"
shape = "linear"
factor = "9936705933/62500000000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B.8 (barrel [for petroleum, 42 gallons (U.S.)] = 1.589 873 E-01 m^3); NIST Handbook 44, Appendix C (231 in^3 per gallon)"
note = "petroleum (oil) barrel = 42 gal_us = 42 * 231 in^3 = 158.987294928 L exactly. The US liquid barrel (31.5 gal) and the dry barrel (7056 in^3) are different units and not included, so read bbl as the oil barrel only"
[[unit]]
id = "psig"
name = "Pound-force per square inch gauge"
aliases = []
dim = [1, -1, -2, 0, 0, 0, 0]
kind = "gauge_pressure"
shape = "linear"
factor = "8896443230521/1290320000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (pound-force per square inch); gauge pressure is measured from the ambient pressure (ADR-013)"
note = "same size as psi; the value is relative to the ambient pressure, which is not part of the unit, so psig converts only to other gauge units (barg, Pag) and never to absolute pressure"
conditions = "gauge: measured from the local ambient pressure, which is not part of the unit"
[[unit]]
id = "barg"
name = "Bar gauge"
aliases = []
dim = [1, -1, -2, 0, 0, 0, 0]
kind = "gauge_pressure"
shape = "linear"
factor = "100000/1"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (bar = 100 kPa); gauge pressure is measured from the ambient pressure (ADR-013)"
note = "same size as bar; gauge reference, see psig"
conditions = "gauge: measured from the local ambient pressure, which is not part of the unit"
[[unit]]
id = "Pag"
name = "Pascal gauge"
aliases = []
dim = [1, -1, -2, 0, 0, 0, 0]
kind = "gauge_pressure"
shape = "linear"
factor = "1/1"
offset = "0/1"
exactness = "defined"
prefixes = "si"
namespace = "si"
source = "BIPM SI Brochure (2019), Table 4 (pascal); gauge pressure is measured from the ambient pressure (ADR-013)"
note = "same size as Pa; gauge reference, see psig. kPag and MPag are SI prefixes on Pag"
conditions = "gauge: measured from the local ambient pressure, which is not part of the unit"
[[unit]]
id = "Nm3"
name = "Normal cubic metre"
symbol = "Nm³"
aliases = ["Nm³"]
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "normal_volume"
shape = "linear"
factor = "1/1"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "DIN 1343 (1990), normal condition: 273.15 K and 101 325 Pa"
note = "normal cubic metre: one m^3 of gas at 273.15 K and 101 325 Pa (ADR-013). Some users mean 20 °C or 15 °C; those are not this unit. Converts only to units with the same reference (Nm3/h to Nm3/min); to m3 or scf it is refused because that needs the actual state and a gas model (ADR-001)"
conditions = "273.15 K (0 °C), 101 325 Pa (DIN 1343 normal condition)"
[[unit]]
id = "scf"
name = "Standard cubic foot"
aliases = []
dim = [0, 3, 0, 0, 0, 0, 0]
kind = "standard_volume"
shape = "linear"
factor = "55306341/1953125000"
offset = "0/1"
exactness = "defined"
prefixes = "none"
namespace = "std"
source = "NIST SP 811 (2008), Appendix B (foot, so the cubic foot is 0.3048^3 m^3); reference state 60 degF and 14.696 psia per GPA Standard 2145 (edition not checked)"
note = "standard cubic foot = ft^3 of gas at 60 degF and 14.696 psia (ADR-013). Some contracts use 14.73 psia; that is not this unit. Converts only within its own reference (scf/min to scf/h); to m3, ft3 or Nm3 it is refused (ADR-001)"
conditions = "60 °F (288.706 K, rounded), 14.696 psia"