Unit converter

Supported units

mm, cm, m, km, in, ft, yd, mi, nmi · mg, g, kg, t, oz, lb, st · ml, cl, dl, l, m3, tsp, tbsp, floz, cup, pt, qt, gal · mm2, cm2, m2, ha, km2, in2, ft2, yd2, acre, mi2 · m/s, km/h, mph, kn · C, F, K · B, KB, MB, GB, TB, KiB, MiB, GiB, TiB. Common spellings also work: miles, feet, inches, pounds, kilograms, liters or litres, gallons, Celsius and Fahrenheit.

Exact factors

Imperial units use their legal definitions: 1 inch is exactly 2.54 cm, 1 pound is exactly 0.45359237 kg, 1 mile is 1609.344 m. Volume units such as cup, pint, quart, gallon and fluid ounce are US customary units (1 US gallon = 3.785411784 litres); the UK gallon is about 20% larger. Results are rounded to 10 significant digits.

Temperature and data sizes

Temperatures are converted with offsets, not just factors: 0 °C is 32 °F and 273.15 K. For data, KB, MB and GB are decimal (1 MB = 1,000,000 bytes, as used by disk makers), while KiB, MiB and GiB are binary (1 MiB = 1,048,576 bytes, as shown by many operating systems). That difference is why a "1 TB" drive shows about 931 GiB.

Example

Four conversions pasted at once: distance, temperature, a cooking measure and a disk size.

Input

10 km to mi
72 F to C
2 cups to ml
1 TB to GiB

Output

10 km = 6.213711922 mi
72 F = 22.22222222 C
2 cups = 473.176473 ml
1 TB = 931.3225746 GiB

How to use

1. Type a number, a unit, the word "to" and the target unit, one conversion per line.
2. Read the result on the matching line.
3. Copy or download the whole list.

FAQ

How many miles is 10 km?

10 km is 6.213711922 miles. One mile is exactly 1.609344 km.

How do I convert Fahrenheit to Celsius?

Subtract 32, then multiply by 5/9. 72 °F is 22.2 °C. To go the other way, multiply by 9/5 and add 32.

Are cups US or metric cups?

US cups (236.59 ml). A metric cup is 250 ml, so for recipes written with metric cups multiply by 250 instead.

Is anything sent to a server?

No. The conversion is done by JavaScript in your browser.