Convert between metric, imperial and US units. Pick what you are measuring, the unit you have and the unit you want — the result also lists the value in every other unit of that kind.
Enter a value, choose the units, then press Convert.
| From | To |
|---|---|
| 1 inch | 2.54 cm |
| 1 foot | 30.48 cm |
| 1 mile | 1.609344 km |
| 1 pound | 0.45359237 kg |
| 1 ounce | 28.349523125 g |
| 1 US gallon | 3.785411784 L |
| 1 acre | 4,046.8564224 m² |
| 60 mph | 96.56064 km/h |
Exactly 1.609344 km. 5 miles = 8.04672 km.
About 2.20462 lb; one pound is exactly 0.45359237 kg.
°F = °C × 9/5 + 32. 100 °C = 212 °F and −40 °C = −40 °F.
Officially 1,000 (kB); 1,024 bytes is a kibibyte (KiB). Both are in the data list.
Factors are the exact international definitions (for example 1 inch = 2.54 cm). US and UK gallons differ and are listed separately.
Calculations people often need alongside this one.
Free calculators for maths, money, school, health, dates and more — no sign-up.
Kept in this browser only. Nothing is sent anywhere, and clearing your browser data removes it.
Your answer is stored in this browser only. It is not sent to us and no totals are counted.