Unit converter
Convert between metric and imperial units, with every unit in the category shown at once.
Converting units
Most conversions multiply by a fixed factor. This tool converts through a base unit (meters for length, kilograms for mass, and so on), so any unit can be converted to any other without a separate formula for each pair.
Temperature is different
Celsius, Fahrenheit, and Kelvin do not share a common zero, so converting needs an offset as well as a scale. For example, °F = °C × 9/5 + 32 and K = °C + 273.15.
US and metric units
Gallons, pints, cups, and fluid ounces here are US customary units. Imperial (UK) units of the same names are different sizes. A year is taken as 365.25 days, and kilobyte means 1,000 bytes while kibibyte means 1,024.
Significant figures
Results show up to eight significant digits. In a lab or class report, round to the precision of your original measurement using the significant figures calculator.