Units

Just enter a value and pick a unit to instantly convert between meters, centimeters, inches, feet, shaku, nautical miles, light-years and more. A single table shows the value in every other unit at once.

Convert between m², acres, hectares, square feet, and Japanese units like tsubo and jo. Enter a value, pick a unit, and see every conversion at once.

Enter a value and pick a unit to convert at once between mL, L, m³, cubic inches, cubic feet, US/UK gallons, pints and quarts, plus the Japanese go, sho, to and koku.

Convert weight and mass between grams, kilograms, tonnes, pounds, ounces, and more. Enter a value, pick its unit, and see a full conversion table instantly.

Just pick a value and unit to convert across the major pressure units at once: Pa, kPa, MPa, hPa, bar, atm, mmHg, psi, kgf/cm² and meters of water. Handy for weather, plumbing, tire pressure and more.

Convert W, kW, MW, horsepower (PS/hp), kcal/h, BTU/h, and erg/s all at once. Just enter a value and pick a unit to see a full conversion table.

Convert energy units like joules, calories, kWh, and electronvolts all at once just by entering a value. Great for estimating electricity costs and studying physics and nutrition.

Free speed unit converter for km/h, m/s, mph, knots, ft/s, and Mach. Enter a value, pick its unit, and see every conversion in one table.

Convert between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur all at once. Just enter a value and pick its unit to see the full conversion table.

Convert between degrees, radians, gradians, arcminutes, arcseconds, and revolutions. Just enter a value and pick a unit to see the conversion to every unit in one table.

Just enter a value and pick a unit to instantly convert between nanoseconds, milliseconds, seconds, minutes, hours, days, weeks, months, years, and centuries. See every unit at once in a single table.