Unit Converters

Free length and distance converter between metric and imperial units: kilometers, miles, meters, centimeters, millimeters, yards, feet and inches. Enter a value and convert instantly.

Free weight and mass converter between metric and imperial units: kilograms, pounds, grams, milligrams, tonnes, ounces and stones. Enter a value and convert instantly.

Free temperature converter between Celsius (°C), Fahrenheit (°F) and Kelvin (K). Enter a temperature and convert instantly, with the exact formulas explained.

Free size converter for shoes and clothing between US, EU and UK sizes, plus foot length in cm. Pick your size and see every equivalent instantly.

Free speed converter between km/h, mph, m/s, knots and ft/s. Enter a value, pick the units and get an instant, accurate conversion for driving, running, sailing and physics.

Free area converter between square metres, square feet, hectares, acres, km², cm² and square yards. Enter a value, pick the units and get an instant, accurate surface-area conversion.

Free volume converter for liters, US gallons, milliliters, cubic meters, quarts, pints, cups and fluid ounces. Enter a value and convert between any two units instantly.

Free data storage converter for bytes, KB, MB, GB, TB plus the binary units MiB and GiB and bits. Understand the difference between decimal (MB) and binary (MiB) units and convert instantly.

Free time converter between hours, minutes, seconds, days, weeks and milliseconds. Enter a value and convert any duration between time units instantly.

Free pressure converter between bar, psi, pascals (Pa), kilopascals (kPa), atmospheres (atm) and millimeters of mercury (mmHg). Enter a value and convert instantly.

Free energy converter between joules (J), kilojoules (kJ), calories (cal), kilocalories (kcal), watt-hours (Wh), kilowatt-hours (kWh) and BTU. Enter a value and convert instantly.

Free power converter between watts (W), kilowatts (kW), mechanical horsepower (hp), metric horsepower (CV) and BTU per hour (BTU/h). Enter a value and convert instantly.

Free angle converter between degrees (°), radians (rad), gradians (grad), arcminutes (arcmin) and arcseconds (arcsec). Enter a value and convert instantly.

Free fuel consumption converter between L/100km, mpg (US), mpg (UK) and km/L. Enter a value and convert instantly between metric and imperial fuel economy figures.