Unit Converter API

Convert a value between units of length, mass, temperature, volume, area, speed, data, time, energy, pressure or fuel economy. Leave out `to` to get every unit in the category.

Convert length, weight, temperature, volume, area, speed, data size, time, energy, pressure and fuel economy, with every unit for your value in one table.

Input

Send these as a JSON object. Unknown fields are rejected.

value

The value to convert. (number, required)

from

Unit id to convert from. Length: nm, um, mm, cm, m, km, in, ft, yd, mi, nmi. Mass and weight: mg, g, kg, t, oz, lb, st, us-ton, uk-ton. Temperature: celsius, fahrenheit, kelvin, rankine. Volume: ml, l, m3, metric-tsp, metric-tbsp, metric-cup, us-tsp, us-tbsp, us-fl-oz, us-cup, us-pint, us-quart, us-gallon, imp-fl-oz, imp-cup, imp-pint, imp-quart, imp-gallon, in3, ft3. Area: mm2, cm2, m2, ha, km2, in2, ft2, yd2, acre, mi2. Speed: mps, kph, mph, knot, fps. Data size: bit, kbit, mbit, gbit, byte, kb, mb, gb, tb, pb, kib, mib, gib, tib, pib. Time: ns, us, ms, s, min, h, day, week, month, year. Energy: j, kj, cal, kcal, wh, kwh, btu, ev, ft-lbf. Pressure: pa, hpa, kpa, mpa, mbar, bar, atm, psi, torr, mmhg, inhg. Fuel economy: l-per-100km, km-per-l, mpg-us, mpg-uk. (string, one of nm, um, mm, cm, m, km, in, ft, yd, mi, nmi, mg, g, kg, t, oz, lb, st, us-ton, uk-ton, celsius, fahrenheit, kelvin, rankine, ml, l, m3, metric-tsp, metric-tbsp, metric-cup, us-tsp, us-tbsp, us-fl-oz, us-cup, us-pint, us-quart, us-gallon, imp-fl-oz, imp-cup, imp-pint, imp-quart, imp-gallon, in3, ft3, mm2, cm2, m2, ha, km2, in2, ft2, yd2, acre, mi2, mps, kph, mph, knot, fps, bit, kbit, mbit, gbit, byte, kb, mb, gb, tb, pb, kib, mib, gib, tib, pib, ns, us, ms, s, min, h, day, week, month, year, j, kj, cal, kcal, wh, kwh, btu, ev, ft-lbf, pa, hpa, kpa, mpa, mbar, bar, atm, psi, torr, mmhg, inhg, l-per-100km, km-per-l, mpg-us, mpg-uk, required)

to

Unit id to convert to, in the same category as from. Omit to convert to every unit in the category. (string, one of nm, um, mm, cm, m, km, in, ft, yd, mi, nmi, mg, g, kg, t, oz, lb, st, us-ton, uk-ton, celsius, fahrenheit, kelvin, rankine, ml, l, m3, metric-tsp, metric-tbsp, metric-cup, us-tsp, us-tbsp, us-fl-oz, us-cup, us-pint, us-quart, us-gallon, imp-fl-oz, imp-cup, imp-pint, imp-quart, imp-gallon, in3, ft3, mm2, cm2, m2, ha, km2, in2, ft2, yd2, acre, mi2, mps, kph, mph, knot, fps, bit, kbit, mbit, gbit, byte, kb, mb, gb, tb, pb, kib, mib, gib, tib, pib, ns, us, ms, s, min, h, day, week, month, year, j, kj, cal, kcal, wh, kwh, btu, ev, ft-lbf, pa, hpa, kpa, mpa, mbar, bar, atm, psi, torr, mmhg, inhg, l-per-100km, km-per-l, mpg-us, mpg-uk)