Unit reference

Every spelling below is checked against a real engine when this page is built, so anything listed here parses and carries the unit it names. Units are case-sensitive throughout: m is metres and M is the millions suffix, MB is megabytes and Mb is megabits.

Where a unit has an American and a British spelling, both are read, an answer shows back the one that was typed, and the row is headed by the British one (kilometre, with kilometer among its spellings). A unit that is typed only as a code, such as mps or kmpl, is headed by its name in words; the Spellings column is always what to type.

5 metre // 5.00 metre
5 meter // 5.00 meter
1 mps // 1.00 mps

100 cm + 2 m // 300.00 cm
5 km to miles // 3.11 miles
1 KiB in bytes // 1,024.00 bytes

See converting units for how conversion and unit arithmetic work. This page is only the vocabulary.

The relative size column is each unit measured against the measure’s base unit, shown to six significant figures for readability. The engine itself uses the full stored value.

Angle

Measured against radian.

Unit	Spellings	Relative size
revolution	revolutions	6.28319
radian	radians, rad, rads	1
degree	degrees, deg, degs	0.0174533
gradian	gradians, gon, gons, grad, grads	0.015708
arcminute	arcminutes, minutes of arc, arcmin, arcmins	0.000290888
arcsecond	arcseconds, seconds of arc, arcsec, arcsecs	0.00000484814

Area

Measured against square metre.

Unit	Spellings	Relative size
square petametre	square petameter, square petameters, square petametres, Pm², Pm2	1e+30
square terametre	square terameter, square terameters, square terametres, Tm², Tm2	1e+24
square gigametre	square gigameter, square gigameters, square gigametres, Gm², Gm2	1000000000000000000
square megametre	square megameter, square megameters, square megametres, Mm², Mm2	1000000000000
square mile	square miles, sq mi, mi², mi2	2589990
square kilometre	square kilometer, square kilometers, square kilometres, km², km2	1000000
square hectometre	square hectometer, square hectometers, square hectometres, hm², hm2, hectare, hectares, ha	10000
acre	acres, ac	4046.86
decare	decares, daa	1000
mu	mu	666.667
square decametre	square decameter, square decameters, square decametres, dam², dam2	100
deciare	deciares, da	10
square metre	square meter, square meters, square metres, m², m2, centiare, centiares, ca	1
square yard	square yards, sq yd, yd², yd2	0.836127
square foot	square feet, sq ft, ft², ft2	0.092903
square decimetre	square decimeter, square decimeters, square decimetres, dm², dm2	0.01
square inch	square inches, sq in, in², in2	0.00064516
square centimetre	square centimeter, square centimeters, square centimetres, cm², cm2	0.0001
square millimetre	square millimeter, square millimeters, square millimetres, mm², mm2	0.000001
square micrometre	square micrometer, square micrometers, square micrometres, μm², µm², μm2, µm2	1e-12
square nanometre	square nanometer, square nanometers, square nanometres, nm², nm2	1e-18
square picometre	square picometer, square picometers, square picometres, pm², pm2	1e-24
square femtometre	square femtometer, square femtometers, square femtometres, fm², fm2	1e-30

Data

Measured against bit.

Unit	Spellings	Relative size
pebibyte	pebibytes, PiB	9007200000000000
petabyte	petabytes, PB	8000000000000000
pebibit	pebibits, Pib	1125900000000000
petabit	petabits, Pb	1000000000000000
tebibyte	tebibytes, TiB	8796093022208
terabyte	terabytes, TB	8000000000000
tebibit	tebibits, Tib	1099511627776
terabit	terabits, Tb	1000000000000
gibibyte	gibibytes, GiB	8589934592
gigabyte	gigabytes, GB	8000000000
gibibit	gibibits, Gib	1073741824
gigabit	gigabits, Gb	1000000000
mebibyte	mebibytes, MiB	8388608
megabyte	megabytes, MB	8000000
mebibit	mebibits, Mib	1048576
megabit	megabits, Mb	1000000
kibibyte	kibibytes, KiB	8192
KB	kilobyte, kilobytes, kB	8000
kibibit	kibibits, Kib	1024
Kb	kilobit, kilobits, kb	1000
hectobyte	hectobytes, hB	800
hectobit	hectobits, hb	100
decabyte	decabytes, daB	80
hextet	hextets	16
decabit	decabits, dab	10
byte	bytes, octect, octects, B	8
nibble	nibbles, semioctet, semioctets, halfbyte, halfbytes	4
bit	bits, b	1
decibyte	decibytes, dB	0.8
decibit	decibits, db	0.1
centibyte	centibytes, cB	0.08
centibit	centibits, cb	0.01
millibyte	millibytes, mB	0.008
millibit	millibits, mb	0.001
microbyte	microbytes, μB, µB	0.000008
microbit	microbits, μb, µb	0.000001
nanobyte	nanobytes, nB	8e-9
nanobit	nanobits, nb	1e-9
picobyte	picobytes, pB	8e-12
picobit	picobits, pb	1e-12
femtobyte	femtobytes, fB	8e-15
femtobit	femtobits, fb	1e-15

Energy

Measured against joule.

Unit	Spellings	Relative size
petawatt-hour	petawatt-hours, PW h, PWh	3600000000000000000
terawatt-hour	terawatt-hours, TW h, TWh	3600000000000000
petajoule	petajoules, PJ	1000000000000000
gigawatt-hour	gigawatt-hours, GW h, GWh	3600000000000
terajoule	terajoules, TJ	1000000000000
megawatt-hour	megawatt-hours, MW h, MWh	3600000000
gigajoule	gigajoules, GJ	1000000000
therm	therms	105506000
kilowatt-hour	kilowatt-hours, kW h, kWh	3600000
megajoule	megajoules, MJ	1000000
hectowatt-hour	hectowatt-hours, hW h, hWh	360000
decawatt-hour	decawatt-hours, daW h, daWh	36000
kcal	kilocalorie, kilocalories, Cal, Calorie, Calories	4184
watt-hour	W h, Wh	3600
BTU	Btu	1055.06
kilojoule	kilojoules, kJ	1000
deciwatt-hour	deciwatt-hours, dW h, dWh	360
hectojoule	hectojoules, hJ	100
centiwatt-hour	centiwatt-hours, cW h, cWh	36
decajoule	decajoules, daJ	10
cal	calorie, calories	4.184
milliwatt-hour	milliwatt-hours, mW h, mWh	3.6
joule	joules, J	1
decijoule	decijoules, dJ	0.1
centijoule	centijoules, cJ	0.01
microwatt-hour	microwatt-hours, μW h, µW h, μWh, µWh	0.0036
millijoule	millijoules, mJ	0.001
nanowatt-hour	nanowatt-hours, nW h, nWh	0.0000036
microjoule	microjoules, μJ, µJ	0.000001
picowatt-hour	picowatt-hours, pW h, pWh	3.6e-9
nanojoule	nanojoules, nJ	1e-9
GeV	GeV	1.60218e-10
femtowatt-hour	femtowatt-hours, fW h, fWh	3.6e-12
picojoule	picojoules, pJ	1e-12
MeV	MeV	1.60218e-13
femtojoule	femtojoules, fJ	1e-15
keV	keV	1.60218e-16
eV	eV	1.60218e-19

Force

Measured against newton.

Unit	Spellings	Relative size
petanewton	petanewtons, PN	1000000000000000
teranewton	teranewtons, TN	1000000000000
giganewton	giganewtons, GN	1000000000
meganewton	meganewtons, MN	1000000
tonne-force	metric ton-force, megagram-force, megapond, tf, Mp	9806.65
kip	klb, kipf, klbf	4448.22
kilonewton	kilonewtons, kN	1000
hectonewton	hectonewtons, hN	100
decanewton	decanewtons, daN	10
kilogram-force	kilopond, kiloponds, kgf, kp	9.80665
pound of force	pound-force, lbf	4.44822
newton	newtons, N	1
poundal	poundals, pdl	0.138255
decinewton	decinewtons, dN	0.1
centinewton	centinewtons, cN	0.01
millinewton	millinewtons, mN	0.001
dyne	dynes, dyn	0.00001
micronewton	micronewtons, μN, µN	0.000001
nanonewton	nanonewtons, nN	1e-9
piconewton	piconewtons, pN	1e-12
femtonewton	femtonewtons, fN	1e-15

Frequency

Measured against hertz.

Unit	Spellings	Relative size
petahertz	PHz	1000000000000000
terahertz	THz	1000000000000
gigahertz	GHz	1000000000
megahertz	MHz	1000000
kilohertz	kHz	1000
hectohertz	hHz	100
decahertz	daHz	10
hertz	Hz	1
decihertz	dHz	0.1
rpm	RPM	0.0166667
centihertz	cHz	0.01
millihertz	mHz	0.001
microhertz	μHz, µHz	0.000001
nanohertz	nHz	1e-9
picohertz	pHz	1e-12
femtohertz	fHz	1e-15

Illuminance

Measured against lux.

Unit	Spellings	Relative size
petalux	Plx	1000000000000000
teralux	Tlx	1000000000000
gigalux	Glx	1000000000
megalux	Mlx	1000000
phot	ph	10000
kilolux	klx	1000
hectolux	hlx	100
foot-candle	foot candle, fc, ft-c	10.764
decalux	dalx	10
lux	lx, lumen per square meter	1
decilux	dlx	0.1
centilux	clx	0.01
millilux	mlx	0.001
microlux	μlx, µlx	0.000001
nanolux	nlx	1e-9
picolux	plx	1e-12
femtolux	flx	1e-15

Length

Measured against metre.

Unit	Spellings	Relative size
parsec	parsecs, pc	30856800000000000
light-year	light-years, ly	9460730000000000
petametre	petameter, petameters, petametres, Pm	1000000000000000
terametre	terameter, terameters, terametres, Tm	1000000000000
AU	AU	149597870700
gigametre	gigameter, gigameters, gigametres, Gm	1000000000
megametre	megameter, megameters, megametres, Mm	1000000
league	leagues	4828.03
nautical mile	nautical miles, NM, nmi	1852
mile	miles, mi	1609.34
kilometre	kilometer, kilometers, kilometres, km	1000
furlong	furlongs	201.168
cable	cables	185.2
hectometre	hectometer, hectometers, hectometres, hm	100
chain	chains	20.1168
decametre	decameter, decameters, decametres, dam	10
rod	rods	5.0292
metre	meter, meters, metres, m	1
yard	yards, yd	0.9144
US survey foot	US survey feet	0.304801
foot	feet, ft	0.3048
hand	hands	0.1016
decimetre	decimeter, decimeters, decimetres, dm	0.1
inch	inches, in	0.0254
centimetre	centimeter, centimeters, centimetres, cm	0.01
pica	picas	0.00423333
millimetre	millimeter, millimeters, millimetres, mm	0.001
typographic point	typographic points	0.000352778
mil	mils	0.0000254
micrometre	micrometer, micrometers, micrometres, μm, µm	0.000001
nanometre	nanometer, nanometers, nanometres, nm	1e-9
picometre	picometer, picometers, picometres	1e-12
femtometre	femtometer, femtometers, femtometres, fm	1e-15

Luminance

Measured against candela per square metre.

Unit	Spellings	Relative size
petacandela per square metre	petacandela per square meter, petacandelas per square meter, petacandelas per square metre, Pcd/m2, Pcd/m²	1000000000000000
teracandela per square metre	teracandela per square meter, teracandelas per square meter, teracandelas per square metre, Tcd/m2, Tcd/m²	1000000000000
gigacandela per square metre	gigacandela per square meter, gigacandelas per square meter, gigacandelas per square metre, Gcd/m2, Gcd/m²	1000000000
megacandela per square metre	megacandela per square meter, megacandelas per square meter, megacandelas per square metre, Mcd/m2, Mcd/m²	1000000
kilocandela per square metre	kilocandela per square meter, kilocandelas per square meter, kilocandelas per square metre, kcd/m2, kcd/m²	1000
hectocandela per square metre	hectocandela per square meter, hectocandelas per square meter, hectocandelas per square metre, hcd/m2, hcd/m²	100
decacandela per square metre	decacandela per square meter, decacandelas per square meter, decacandelas per square metre, dacd/m2, dacd/m²	10
candela per square metre	candela per square meter, candelas per square meter, candelas per square metre, cd/m2, cd/m², nit, nits, nt	1
decicandela per square metre	decicandela per square meter, decicandelas per square meter, decicandelas per square metre, dcd/m2, dcd/m²	0.1
centicandela per square metre	centicandela per square meter, centicandelas per square meter, centicandelas per square metre, ccd/m2, ccd/m²	0.01
millicandela per square metre	millicandela per square meter, millicandelas per square meter, millicandelas per square metre, mcd/m2, mcd/m²	0.001
microcandela per square metre	microcandela per square meter, microcandelas per square meter, microcandelas per square metre, μcd/m2, µcd/m2, μcd/m², µcd/m²	0.000001
nanocandela per square metre	nanocandela per square meter, nanocandelas per square meter, nanocandelas per square metre, ncd/m2, ncd/m²	1e-9
picocandela per square metre	picocandela per square meter, picocandelas per square meter, picocandelas per square metre, pcd/m2, pcd/m²	1e-12
femtocandela per square metre	femtocandela per square meter, femtocandelas per square meter, femtocandelas per square metre, fcd/m2, fcd/m²	1e-15

Luminous intensity

Measured against candela.

Unit	Spellings	Relative size
petacandela	Pcd	1000000000000000
teracandela	Tcd	1000000000000
gigacandela	Gcd	1000000000
megacandela	Mcd	1000000
kilocandela	kcd	1000
hectocandela	hcd	100
decacandela	dacd	10
candela	cd, candlepower, cp, CP	1
hefnerkerze	HK	0.92
decicandela	dcd	0.1
centicandela	ccd	0.01
millicandela	mcd	0.001
microcandela	μcd, µcd	0.000001
nanocandela	ncd	1e-9
picocandela	pcd	1e-12
femtocandela	fcd	1e-15

Mass

Measured against gram.

Unit	Spellings	Relative size
petagram	petagrams, Pg, gigatonne, gigatonnes, Gt	1000000000000000
teragram	teragrams, Tg, megatonne, megatonnes, Mt	1000000000000
gigagram	gigagrams, Gg, kilotonne, kilotonnes, kt	1000000000
long ton	long tons, imperial ton, imperial tons, displacement ton, displacement tons	1016050
megagram	megagrams, Mg, tonne, tonnes, metric ton, metric tons, t	1000000
short ton	short tons, US ton, US tons	907185
centner	centners	100000
long hundredweight	imperial hundredweight, cwt	50800
short hundredweight	cental	45360
stone	stones, st	6350.29
kilogram	kilograms, kg	1000
pound	pounds, lb, lbs	453.592
hectogram	hectograms, hg	100
troy ounce	oz t, toz	31.1035
ounce	ounces, oz	28.3495
decagram	decagrams, dag	10
gram	grams, g	1
carat	carats	0.2
decigram	decigrams, dg	0.1
grain	grains, gr	0.0647989
centigram	centigrams, cg	0.01
milligram	milligrams, mg	0.001
microgram	micrograms, μg, µg, mcg	0.000001
nanogram	nanograms, ng	1e-9
picogram	picograms, pg	1e-12
femtogram	femtograms, fg	1e-15

Power

Measured against watt.

Unit	Spellings	Relative size
petawatt	petawatts, PW	1000000000000000
terawatt	terawatts, TW	1000000000000
gigawatt	gigawatts, GW	1000000000
megawatt	megawatts, MW	1000000
kilowatt	kilowatts, kW	1000
horsepower	mechanical horsepower, hp	745.7
hectowatt	hectowatts, hW	100
decawatt	decawatts, daW	10
watt	watts, W	1
deciwatt	deciwatts, dW	0.1
centiwatt	centiwatts, cW	0.01
milliwatt	milliwatts, mW	0.001
microwatt	microwatts, μW, µW	0.000001
nanowatt	nanowatts, nW	1e-9
picowatt	picowatts, pW	1e-12
femtowatt	femtowatts, fW	1e-15

Pressure

Measured against pascal.

Unit	Spellings	Relative size
petabar	petabars, Pbar	100000000000000000000
terabar	terabars, Tbar	100000000000000000
petapascal	petapascals, PPa	1000000000000000
gigabar	gigabars, Gbar	100000000000000
terapascal	terapascals, TPa	1000000000000
megabar	megabars, Mbar	100000000000
gigapascal	gigapascals, GPa	1000000000
kilobar	kilobars, kbar	100000000
hectobar	hectobars, hbar	10000000
megapascal	megapascals, MPa, decabar, decabars, dabar	1000000
atmosphere	atmospheres, atm	101325
bar	bars	100000
decibar	decibars, dbar	10000
pound per square inch	pounds per square inch, psi, lbf/in2, lbf/in²	6894.76
inch of mercury	inches of mercury, inHg, Hg	3386.39
kilopascal	kilopascals, kPa, centibar, centibars, cbar	1000
inch of water	inches of water, inAq, Aq	249.089
mmHg	mmHg	133.322
torr	torrs, Torr	133.322
hectopascal	hectopascals, hPa, millibar, millibars, mbar	100
decapascal	decapascals, daPa	10
pascal	pascals, Pa	1
millitorr	mTorr	0.133322
decipascal	decipascals, dPa, microbar, microbars, μbar, µbar	0.1
centipascal	centipascals, cPa	0.01
millipascal	millipascals, mPa	0.001
nanobar	nanobars, nbar	0.0001
micropascal	micropascals, μPa, µPa	0.000001
picobar	picobars, pbar	1e-7
nanopascal	nanopascals, nPa	1e-9
femtobar	femtobars, fbar	1e-10
picopascal	picopascals, pPa	1e-12
femtopascal	femtopascals, fPa	1e-15

Temperature

Measured against kelvin.

Unit	Spellings	Relative size
petakelvin	petakelvins, PK	1000000000000000
terakelvin	terakelvins, TK	1000000000000
gigakelvin	gigakelvins, GK	1000000000
megakelvin	megakelvins, MK	1000000
kilokelvin	kilokelvins, kK	1000
hectokelvin	hectokelvins, hK	100
decakelvin	decakelvins, daK	10
kelvin	kelvins, K	1
celsius	C, °C	1
rankine	rankine	0.555556
fahrenheit	F, °F	0.555556
decikelvin	decikelvins, dK	0.1
centikelvin	centikelvins, cK	0.01
millikelvin	millikelvins, mK	0.001
microkelvin	microkelvins, μK, µK	0.000001
nanokelvin	nanokelvins, nK	1e-9
picokelvin	picokelvins, pK	1e-12
femtokelvin	femtokelvins, fK	1e-15

Some of these share a degree size but not a zero point, which the column above cannot show. Celsius and kelvin step alike and start 273.15 apart, and Fahrenheit and Rankine do the same.

Time

Measured against second.

Unit	Spellings	Relative size
petasecond	petaseconds, Ps	1000000000000000
terasecond	teraseconds, Ts	1000000000000
millennium	millennia	31536000000
century	centuries	3153600000
gigasecond	gigaseconds, Gs	1000000000
decade	decades	315360000
year	years, yr, yrs	31536000
month	months, mo	2592000
fortnight	fortnights, fn	1209600
megasecond	megaseconds, Ms	1000000
week	weeks, wk, wks	604800
day	days, d	86400
hour	hours, h, hr, hrs	3600
kilosecond	kiloseconds, ks	1000
hectosecond	hectoseconds, hs	100
milliday	millidays, md	86.4
minute	minutes, min, mins	60
decasecond	decaseconds, das	10
second	seconds, s, sec, secs	1
decisecond	deciseconds, ds	0.1
centisecond	centiseconds, cs	0.01
time unit	TU	0.001024
millisecond	milliseconds, ms	0.001
microsecond	microseconds, μs, µs	0.000001
nanosecond	nanoseconds, ns	1e-9
picosecond	picoseconds, ps	1e-12
svedberg	svedbergs	1e-13
femtosecond	femtoseconds, fs	1e-15

Volume

Measured against cubic metre.

Unit	Spellings	Relative size
cubic petameter	cubic petameters, Pm3, Pm³	1e+45
cubic terameter	cubic terameters, Tm3, Tm³	1e+36
cubic gigameter	cubic gigameters, Gm3, Gm³	1e+27
cubic megameter	cubic megameters, Mm3, Mm³	1000000000000000000
petalitre	petaliter, petaliters, petalitres, Pl, PL	1000000000000
cubic mile	cubic miles, cu mi, mi3, mi³	4168180000
cubic kilometer	cubic kilometers, km3, km³, teraliter, teraliters, teralitre, teralitres, Tl, TL	1000000000
cubic hectometer	cubic hectometers, hm3, hm³, gigaliter, gigaliters, gigalitre, gigalitres, Gl, GL	1000000
acre-foot	acre-feet, ac ft	1233.48
cubic decameter	cubic decameters, dam3, dam³, megaliter, megaliters, megalitre, megalitres, Ml, ML	1000
measurement ton	measurement tons, MTON	1.133
cubic metre	cubic meter, cubic meters, cubic metres, stere, steres, m³, m3, kiloliter, kiloliters, kilolitre, kilolitres, kl, kL	1
cubic yard	cubic yards, cu yd, yd3, yd³	0.764555
imperial barrel	imperial barrels, imp bbl	0.163659
US dry barrel	US dry barrels, US dry bbl	0.1156
hectolitre	hectoliter, hectoliters, hectolitres, hl, hL	0.1
imperial bushel	imperial bushels, imp bsh, imp bu	0.0363687
US bushel	US bushels, US bsh, US bu	0.0352391
cubic foot	cubic feet, cu ft, ft3, ft³	0.0283168
decalitre	decaliter, decaliters, decalitres, dal, daL	0.01
imperial peck	imperial pecks, pk, imp pk	0.00909218
US peck	US pk	0.00880977
imperial gallon	imperial gallons, imp gal	0.00454609
US dry gallon	US dry gal	0.00440488
gallon	gallons, US liquid gallon, US liquid gallons, gal	0.00378541
board foot	board feet	0.00235974
imperial quart	imperial quarts, imp qt	0.00113652
US dry quart	US dry qt	0.00110122
cubic decimeter	cubic decimeters, dm3, dm³, liter, liters, litre, litres, l, L	0.001
quart	quarts, US liquid quart, US liquid quarts, qt	0.000946353
imperial pint	imperial pints, imp pt	0.000568261
US dry pint	US dry pt	0.00055061
pint	pints, US liquid pint, US liquid pints, pt	0.000473176
imperial cup	imperial cups	0.000284131
metric cup	metric cups	0.00025
US legal cup	US legal cups, US lc	0.00024
cup	cups, US cup, US cups	0.000236588
decilitre	deciliter, deciliters, decilitres, dl, dL	0.0001
US fluid ounce	US fluid ounces, fl oz	0.0000295735
imperial fluid ounce	imperial fluid ounces, imp fl oz	0.0000284131
cubic inch	cubic inches, cu in, in3, in³	0.0000163871
tablespoon	tablespoons, US tablespoon, US tablespoons, tbsp	0.0000147868
centilitre	centiliter, centiliters, centilitres, cl, cL	0.00001
teaspoon	teaspoons, US teaspoon, US teaspoons, tsp	0.00000492892
cubic centimeter	cubic centimeters, cm3, cm³, milliliter, milliliters, millilitre, millilitres, ml, mL	0.000001
cubic millimeter	cubic millimeters, mm3, mm³, microliter, microliters, microlitre, microlitres, μl, µl, μL, µL	1e-9
nanolitre	nanoliter, nanoliters, nanolitres, nl, nL	1e-12
picolitre	picoliter, picoliters, picolitres, pl, pL	1e-15
cubic micrometer	cubic micrometers, μm3, µm3, μm³, µm³, femtoliter, femtoliters, femtolitre, femtolitres, fl, fL	1e-18
cubic nanometer	cubic nanometers, nm3, nm³	1e-27
cubic picometer	cubic picometers, pm3, pm³	1e-36
cubic femtometer	cubic femtometers, fm3, fm³	1e-45

Speed

Measured against metre per second.

Unit	Spellings	Relative size
metre per second	mps	1
knot	kn, knots	0.514444
mile per hour	mph	0.44704
foot per second	ft_s	0.3048
kilometre per hour	kph	0.277778

Pace

Measured against one second per metre, which no spelling here names on its own.

Unit	Spellings	Relative size
minute per kilometre	min_km	0.06
minute per mile	min_mi	0.0372823

Data rate

Measured against bit per second.

Unit	Spellings	Relative size
terabit per second	Tbps	1000000000000
gigabyte per second	GBps	8000000000
gigabit per second	Gbps	1000000000
megabyte per second	MBps	8000000
megabit per second	Mbps	1000000
kilobyte per second	kBps	8000
kilobit per second	kbps	1000
bit per second	bps	1

Css length

Measured against CSS pixel.

Unit	Spellings	Relative size
root em	rem	16
CSS pixel	px	1

Voltage

Measured against volt.

Unit	Spellings	Relative size
kilovolt	kV	1000
volt	V, volts	1
millivolt	mV	0.001

Current

Measured against ampere.

Unit	Spellings	Relative size
kiloampere	kA	1000
ampere	A, amp, amps, amperes	1
milliampere	mA	0.001

Resistance

Measured against ohm.

Unit	Spellings	Relative size
MΩ	MΩ	1000000
kΩ	kΩ	1000
ohm	ohms, Ω, Ω	1

Charge

Measured against coulomb.

Unit	Spellings	Relative size
Ah	Ah	3600
mAh	mAh	3.6
coulomb	coulombs	1

Apparent power

Measured against volt-ampere.

Unit	Spellings	Relative size
megavolt-ampere	MVA	1000000
kilovolt-ampere	kVA	1000
volt-ampere	VA	1

Reactive power

Measured against one var, which no spelling here names on its own.

Unit	Spellings	Relative size
megavar	Mvar	1000000
kilovar	kvar	1000

Reactive energy

Measured against var-hour.

Unit	Spellings	Relative size
megavar-hour	Mvarh	1000000
kilovar-hour	kvarh	1000
var-hour	varh	1

Volume flow rate

Measured against cubic metre per second.

Unit	Spellings	Relative size
cubic metre per second	m3s	1
cubic foot per second	cfs	0.0283168
litre per second	lps	0.001
cubic metre per hour	m3h	0.000277778
US gallon per minute	gpm	0.0000630902
litre per minute	lpm	0.0000166667

Fuel economy

Measured against kilometre per litre.

Unit	Spellings	Relative size
kilometre per litre	kmpl	1
mile per US gallon	mpg	0.425144
mile per imperial gallon	mpg imperial, imperial mpg, mpg uk, mpg UK, UK mpg	0.354006

Fuel consumption

Measured against one litre per kilometre, which no spelling here names on its own.

Unit	Spellings	Relative size
litre per 100 kilometres	l100km	0.01

Parts per

Measured against one whole, which no spelling here names on its own.

Unit	Spellings	Relative size
permille	permille	0.001
part per million	ppm	0.000001
part per billion	ppb	1e-9
part per trillion	ppt	1e-12

Amount of substance

Measured against mol.

Unit	Spellings	Relative size
mol	mol	1
mmol	mmol	0.001

Spellings that are not listed

The conversion tables carry 1583 spellings in total, and 49 of them are missing above. Most carry a character an expression cannot type as part of a unit, such as the dot in W⋅h or the full stops in fl. oz., and a few are ordinary words the lexer leaves to English, such as turn and point. The tables can resolve them but an expression cannot spell them, so they are excluded here rather than listed and quietly broken.