Unit Converter
Convert between common units across length, weight, area, volume, time, data, and temperature.
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About this tool
Unit Converter converts between common units across 7 categories: length, weight, area, volume, time, data, and temperature. Type a value, pick from / to units, and read the result.
How conversion works
Each unit is anchored to a canonical base value (e.g. meter for length, gram for weight). The math behind the scene is just value × scale-to-base × scale-from-base. Temperature is the only category that’s non-linear (Fahrenheit and Celsius are offset scales), so we model it with explicit affine formulas.
Categories
- Length: mm, cm, m, km, in, ft, yd, mi, nmi, light-year.
- Weight: mg, g, kg, t (metric), oz, lb, stone.
- Area: m², cm², km², ha, in², ft², acre.
- Volume: ml, l, m³ + US teaspoon / tablespoon / cup / pint / gallon.
- Time: ms through light-year, plus month (30.4 d) and year (365.25 d).
- Data size: byte, KB, MB, GB, TB, PB — all in 1024-base, not 1000, to match what every operating system shows you.
- Temperature: °C, °F, K.
All-units view
Below the input form, the same value is shown in every unit in the active category. Quick for double-checking “is this 16 feet or 4.88 m?”.
Limits and gotchas
- Data units use 1024-binary (KiB / MiB / GiB in the SI sense), which matches what every OS file manager shows. Marketing MB uses 1000.
- Year / month averages: 365.25 d / 30.4 d, ignoring leap years and calendar months.
- Light-year is included for fun (9.46 petameters). Don’t actually need it? Convert to m first.
Privacy
Pure arithmetic, runs in your browser.