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), dyne (dyn), poundforce (lbf)
Energy	joule (J), erg, Wh, BTU, electronvolt (eV)
Power	watt (W), hp
Pressure	Pa, psi, atm
Electricity and Magnetism	ampere (A), coulomb (C), watt (W), volt (V), ohm, farad (F), weber (Wb), tesla (T), henry (H), siemens (S), electronvolt (eV)
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.

Surface and volume units can alternatively be expressed in terms of length units raised to a power, for example 100 in^2 instead of 100 sqin.

The following decimal prefixes are available.

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