mathjs/docs/reference/units.md

Unit reference

This page lists all available units and prefixes. How to use units is explained on the page Units.

Units

Math.js comes with the following built-in units.

Base	Unit
Length	meter (m), inch (in), foot (ft), yard (yd), mile (mi), link (li), rod (rd), chain (ch), angstrom, mil
Surface	m2, sqin, sqft, sqyd, sqmi, sqrd, sqch, sqmil
Volume	m3, litre (l, L, lt, liter), cc, cuin, cuft, cuyd, teaspoon, tablespoon
Liquid volume	minim (min), fluiddram (fldr), fluidounce (floz), gill (gi), cup (cp), pint (pt), quart (qt), gallon (gal), beerbarrel (bbl), oilbarrel (obl), hogshead, drop (gtt)
Angles	rad, deg, grad, cycle
Time	second (s), seconds, minute (minutes), hour (h, hours), day (days)
Mass	gram(g), tonne, ton, grain (gr), dram(dr), ounce (oz), poundmass (lbm, lb, lbs), hundredweight (cwt), stick, stone
Electric current	ampere (A)
Temperature	kelvin (K), celsius (degC), fahrenheit (degF), rankine (degR)
Amount of substance	mole (mol)
Luminous intensity	candela (cd)
Force	newton (N), poundforce (lbf)
Binary	bit (b), byte (B)

Note that all relevant units can also be written in plural form, for example 5 meters instead of 5 meter or 10 seconds instead of 10 second.

Prefixes

The following decimal prefixes are available.

Name	Abbreviation	Value
deca	da	1e1
hecto	h	1e2
kilo	k	1e3
mega	M	1e6
giga	G	1e9
tera	T	1e12
peta	P	1e15
exa	E	1e18
zetta	Z	1e21
yotta	Y	1e24

Name	Abbreviation	Value
deci	d	1e-1
centi	c	1e-2
milli	m	1e-3
micro	u	1e-6
nano	n	1e-9
pico	p	1e-12
femto	f	1e-15
atto	a	1e-18
zepto	z	1e-21
yocto	y	1e-24

The following binary prefixes are available. They can be used with units bit (b) and byte (B).

Name	Abbreviation	Value
kilo, kibi	k, Ki	1024
mega, mebi	M, Mi	1024^2
giga, gibi	G, Gi	1024^3
tera, tebi	T, Ti	1024^4
peta, pebi	P, Pi	1024^5
exa, exi	E, Ei	1024^6
zetta, zebi	Z, Zi	1024^7
yotta, yobi	Y, Yi	1024^8