SI Units¶

All SI base units and named derived units registered in quantia. Values are exact unless noted. Sources: NIST SP811 Table 2 and Table 4.

† Affine unit (temperature only in this section).

Angle¶

Symbol	Name	SI unit	Factor to SI
`arcmin`	arcminute	`rad`	0.000290888
`arcsec`	arcsecond	`rad`	4.84814e-06
`deg`	degree	`rad`	0.0174533
`rad`	radian	`rad`	1
`°`	degree	`rad`	0.0174533
`′`	arcminute	`rad`	0.000290888
`″`	arcsecond	`rad`	4.84814e-06

Symbol	Name	SI unit	Factor to SI
`F`	farad	`F`	1
`mF`	millifarad	`F`	0.001
`nF`	nanofarad	`F`	1e-09
`pF`	picofarad	`F`	1e-12
`uF`	microfarad	`F`	1e-06
`µF`	microfarad	`F`	1e-06

Symbol	Name	SI unit	Factor to SI
`A`	ampere	`A`	1
`mA`	milliampere	`A`	0.001
`nA`	nanoampere	`A`	1e-09
`uA`	microampere	`A`	1e-06
`µA`	microampere	`A`	1e-06

Symbol	Name	SI unit	Factor to SI
`A_h`	ampere-hour	`C`	3600
`C`	coulomb	`C`	1

Symbol	Name	SI unit	Factor to SI
`S`	siemens	`S`	1

Symbol	Name	SI unit	Factor to SI
`BOE`	barrel of oil equivalent	`J`	6.117e+09
`BTU_IT`	British thermal unit (International Table)	`J`	1055.06
`BTU_th`	British thermal unit (thermochemical)	`J`	1054.35
`cal_IT`	calorie (International Table)	`J`	4.1868
`cal_th`	calorie (thermochemical)	`J`	4.184
`erg`	erg	`J`	1e-07
`eV`	electronvolt	`J`	1.60218e-19
`ft_lbf`	foot pound-force	`J`	1.35582
`GJ`	gigajoule	`J`	1e+09
`J`	joule	`J`	1
`kcal_IT`	kilocalorie (International Table)	`J`	4186.8
`kcal_th`	kilocalorie (thermochemical)	`J`	4184
`kJ`	kilojoule	`J`	1000
`kWh`	kilowatt-hour	`J`	3.6e+06
`Mcfe`	thousand cubic feet equivalent	`J`	1.05506e+09
`MJ`	megajoule	`J`	1e+06
`MMBtu`	million BTU (IT)	`J`	1.05506e+09
`therm_EC`	therm (EC)	`J`	1.05506e+08
`therm_US`	therm (US)	`J`	1.0548e+08
`toe`	tonne of oil equivalent	`J`	4.1868e+10
`Wh`	watt-hour	`J`	3600

Symbol	Name	SI unit	Factor to SI
`dyn`	dyne	`N`	1e-05
`kgf`	kilogram-force	`N`	9.80665
`kip`	kip (1000 lbf)	`N`	4448.22
`kN`	kilonewton	`N`	1000
`lbf`	pound-force	`N`	4.44822
`MN`	meganewton	`N`	1e+06
`mN`	millinewton	`N`	0.001
`N`	newton	`N`	1
`ozf`	ounce-force	`N`	0.278014
`pdl`	poundal	`N`	0.138255
`uN`	micronewton	`N`	1e-06
`µN`	micronewton	`N`	1e-06

Symbol	Name	SI unit	Factor to SI
`GHz`	gigahertz	`Hz`	1e+09
`Hz`	hertz	`Hz`	1
`kHz`	kilohertz	`Hz`	1000
`MHz`	megahertz	`Hz`	1e+06
`THz`	terahertz	`Hz`	1e+12

Symbol	Name	SI unit	Factor to SI
`lx`	lux	`lx`	1

Symbol	Name	SI unit	Factor to SI
`H`	henry	`H`	1
`mH`	millihenry	`H`	0.001
`nH`	nanohenry	`H`	1e-09
`uH`	microhenry	`H`	1e-06
`µH`	microhenry	`H`	1e-06

Symbol	Name	SI unit	Factor to SI
`cm`	centimetre	`m`	0.01
`ft`	foot	`m`	0.3048
`in`	inch	`m`	0.0254
`km`	kilometre	`m`	1000
`ly`	light year	`m`	9.46073e+15
`m`	metre	`m`	1
`mi`	mile	`m`	1609.34
`mil`	mil (0.001 inch)	`m`	2.54e-05
`mm`	millimetre	`m`	0.001
`nm`	nanometre	`m`	1e-09
`nmi`	nautical mile	`m`	1852
`um`	micrometre	`m`	1e-06
`yd`	yard	`m`	0.9144
`Å`	ångström	`m`	1e-10

Symbol	Name	SI unit	Factor to SI
`lm`	lumen	`lm`	1

Symbol	Name	SI unit	Factor to SI
`mWb`	milliweber	`Wb`	0.001
`Mx`	maxwell	`Wb`	1e-08
`uWb`	microweber	`Wb`	1e-06
`Wb`	weber	`Wb`	1
`µWb`	microweber	`Wb`	1e-06

Symbol	Name	SI unit	Factor to SI
`G`	gauss	`T`	0.0001
`mT`	millitesla	`T`	0.001
`nT`	nanotesla	`T`	1e-09
`T`	tesla	`T`	1
`uT`	microtesla	`T`	1e-06
`µT`	microtesla	`T`	1e-06

Symbol	Name	SI unit	Factor to SI
`Da`	dalton	`kg`	1.66054e-27
`g`	gram	`kg`	0.001
`gr`	grain	`kg`	6.47989e-05
`kg`	kilogram	`kg`	1
`lb`	pound	`kg`	0.453592
`mg`	milligram	`kg`	1e-06
`oz`	ounce	`kg`	0.0283495
`slug`	slug	`kg`	14.5939
`t`	tonne	`kg`	1000
`ton_long`	long ton (2240 lb)	`kg`	1016.05
`ton_short`	short ton (2000 lb)	`kg`	907.185

Symbol	Name	SI unit	Factor to SI
`BTU_IT/h`	BTU (IT) per hour	`W`	0.293071
`GW`	gigawatt	`W`	1e+09
`hp`	horsepower (550 ft·lbf/s)	`W`	745.7
`kW`	kilowatt	`W`	1000
`MW`	megawatt	`W`	1e+06
`mW`	milliwatt	`W`	0.001
`uW`	microwatt	`W`	1e-06
`W`	watt	`W`	1
`µW`	microwatt	`W`	1e-06

Symbol	Name	SI unit	Factor to SI
`atm`	standard atmosphere	`Pa`	101325
`bara` †	bar (absolute)	`Pa`	100000
`barg` †	bar (gauge)	`Pa`	100000
`cmHg`	centimetre of mercury (conventional)	`Pa`	1333.22
`ftH2O`	foot of water (conventional)	`Pa`	2989.07
`GPa`	gigapascal	`Pa`	1e+09
`inH2O`	inch of water (conventional)	`Pa`	249.089
`inHg`	inch of mercury (conventional)	`Pa`	3386.39
`kg/cm2`	kilogram-force per square centimetre	`Pa`	98066.5
`kgf/cm2`	kilogram-force per square centimetre	`Pa`	98066.5
`kPa`	kilopascal	`Pa`	1000
`ksi`	kip per square inch	`Pa`	6.89476e+06
`mbar`	millibar	`Pa`	100
`mmHg`	millimetre of mercury (conventional)	`Pa`	133.322
`MPa`	megapascal	`Pa`	1e+06
`Pa`	pascal	`Pa`	1
`psi`	pound per square inch	`Pa`	6894.76
`psia` †	pound per square inch (absolute)	`Pa`	6894.76
`psig` †	pound per square inch (gauge)	`Pa`	6894.76
`torr`	torr	`Pa`	133.322
`uPa`	micropascal	`Pa`	1e-06
`µPa`	micropascal	`Pa`	1e-06

Symbol	Name	SI unit	Factor to SI
`Bq`	becquerel	`Hz`	1

Symbol	Name	SI unit	Factor to SI
`GΩ`	gigaohm	`Ω`	1e+09
`kΩ`	kiloohm	`Ω`	1000
`MΩ`	megaohm	`Ω`	1e+06
`Ω`	ohm	`Ω`	1

Symbol	Name	SI unit	Factor to SI
`sr`	steradian	`sr`	1

Symbol	Name	SI unit	Factor to SI
`K` †	kelvin	`K`	1
`°C` †	celsius	`K`	1
`°F` †	fahrenheit	`K`	0.555556
`°R` †	rankine	`K`	0.555556

Symbol	Name	SI unit	Factor to SI
`d`	day	`s`	86400
`day`	day	`s`	86400
`h`	hour	`s`	3600
`min`	minute	`s`	60
`ms`	millisecond	`s`	0.001
`s`	second	`s`	1
`us`	microsecond	`s`	1e-06
`week`	week	`s`	604800
`yr`	year (365 days)	`s`	3.1536e+07

Symbol	Name	SI unit	Factor to SI
`kV`	kilovolt	`V`	1000
`mV`	millivolt	`V`	0.001
`nV`	nanovolt	`V`	1e-09
`uV`	microvolt	`V`	1e-06
`V`	volt	`V`	1
`µV`	microvolt	`V`	1e-06