Unit converter
Length, weight, temperature, volume and more.
How to convert units
Choose the type of measurement, type a value and select the units you want to convert from and to. The result updates instantly, and below it you’ll find the same value converted into every other unit of that type, handy when you’re not sure which unit you need.
Most common conversions
| From | To | Formula |
|---|---|---|
| 1 inch | 2.54 cm | cm = in × 2.54 |
| 1 foot | 30.48 cm | m = ft × 0.3048 |
| 1 mile | 1.609 km | km = mi × 1.609344 |
| 1 pound | 0.4536 kg | kg = lb × 0.45359237 |
| °C to °F | — | °F = °C × 9/5 + 32 |
| 1 US gallon | 3.785 L | L = gal × 3.785411784 |
Metric vs imperial
Most of the world uses the metric system (meters, kilograms, liters), while the United States commonly uses US customary units (feet, pounds, gallons). This converter uses the exact international definitions: for example, an inch is exactly 2.54 cm and a pound is exactly 0.45359237 kg. Volume units such as cups, fluid ounces and gallons use US measures.
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 and add 32. For example, 25 °C × 9/5 + 32 = 77 °F. To go back, subtract 32 and multiply by 5/9.
How many centimeters is 5 feet 7 inches?
5 ft 7 in is 67 inches, and 67 × 2.54 = 170.18 cm.
What is the difference between MB and MiB?
A megabyte (MB) is 1,000,000 bytes, while a mebibyte (MiB) is 1,048,576 bytes. Operating systems often show MiB but label them “MB”, which is why a drive can look smaller than advertised.