Unit Converter
Convert length, weight, temperature, volume, data size and more.
Units
Length
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Exact conversions
- Factors from their definitions: 1 inch is exactly 2.54 cm, 1 pound exactly 0.45359237 kg, 1 US gallon exactly 3.785411784 litres. Results are calculated with exact decimals and rounded only for display.
- Feet and inches together: Type 5 ft 11 in, 5'11" or 1 lb 8 oz: each part is converted exactly and added.
- Temperatures are offsets: Celsius and Fahrenheit do not start at zero together, so 72 °F is 22.2 °C. Values below absolute zero are flagged.
- MB is not MiB: A megabyte is 1,000,000 bytes, a mebibyte 1,048,576. Both are offered and never mixed.
Frequently asked questions
Which gallon, cup and pint are used?
US customary ones unless you choose the imperial gallon, pint or fluid ounce, which are larger.
Can I convert cups of flour to grams?
Not here: that depends on the ingredient and how it is packed. Cups convert to millilitres and other volumes exactly.
Can I type the conversion in the search?
Yes. "10 miles to km" or "72 f to c" is answered right in the search.