Conversions calculators

Precise unit conversions across metric and imperial systems, each showing the exact factor used in the calculation.

• Length ConverterConvert length and distance units including millimetres, metres, kilometres, inches, feet, yards and miles.
• Weight & Mass ConverterConvert mass units between grams, kilograms, tonnes, ounces, pounds and stones with exact factors.
• Volume ConverterConvert volume units between millilitres, litres, cubic metres, cups, pints and US gallons.
• Temperature ConverterConvert temperatures between Celsius, Fahrenheit and Kelvin with all three values shown side by side.
• Celsius to Fahrenheit ConverterConvert Celsius to Fahrenheit instantly, with the exact formula, the calculation steps and worked examples for common temperatures.
• Fahrenheit to Celsius ConverterConvert Fahrenheit to Celsius instantly with the exact formula, calculation steps, Kelvin equivalent and worked examples.
• Meters to Feet ConverterConvert meters to feet using the exact 0.3048 definition, with calculation steps, the reverse factor and worked examples.
• Feet to Meters ConverterConvert feet to meters with the exact 0.3048 factor, showing the calculation steps, the reverse factor and practical examples.
• Kilograms to Pounds ConverterConvert kilograms to pounds with the exact 0.45359237 factor, calculation steps, the reverse factor and everyday examples.
• Pounds to Kilograms ConverterConvert pounds to kilograms using the exact avoirdupois factor, with calculation steps, the reverse factor and worked examples.
• Miles to Kilometers ConverterConvert miles to kilometers with the exact 1.609344 factor, calculation steps, the reverse factor and running and driving examples.
• Kilometers to Miles ConverterConvert kilometers to miles with the exact factor, calculation steps, the reverse factor and race-distance examples.