Unit converters

Length, weight, volume, area, temperature, speed, pressure, energy, data size and fuel economy — with a table of every unit. Plus shoe sizes.

11 tools

• Length converter

  Convert length and distance between US and metric units: inches, feet, yards, miles, millimeters, centimeters, meters and kilometers.

• Weight converter

  Convert weight between pounds, ounces, stones, US and UK tons, kilograms, grams, metric tons and carats.

• Volume converter

  Convert volume between US and UK gallons, quarts, pints, cups, fluid ounces, tablespoons, teaspoons, liters, milliliters and cubic units.

• Area converter

  Convert area between square feet, square yards, acres, square miles, square meters, hectares and square kilometers.

• Temperature converter

  Convert temperatures between Fahrenheit, Celsius and Kelvin — for recipes, weather forecasts or science homework.

• Speed converter

  Convert speed between miles per hour, kilometers per hour, meters per second, feet per second and knots.

• Pressure converter

  Convert pressure between psi, bar, atmospheres, kilopascals, pascals, mmHg and inches of mercury — for tires, gauges and weather.

• Energy converter

  Convert energy between kilowatt-hours, BTUs, kilocalories (food Calories), kilojoules and joules.

• Data size converter

  Convert data sizes between bits, bytes, kilobytes, megabytes, gigabytes and terabytes — decimal units and binary ones (KiB, MiB, GiB).

• Fuel economy converter

  Convert fuel economy between US mpg, UK mpg, liters per 100 km and kilometers per liter.

• Shoe size converter

  Convert adult shoe sizes between US men's, US women's, UK and European systems, and see the matching foot length in centimeters.