Unit Converters

Convert between units of length, weight, temperature, speed, volume, area, data, time, pressure, energy, fuel efficiency, and angles.

12 tools

Length Converter

Convert between meters, feet, inches, centimeters, kilometers, miles, yards, and nautical miles instantly.

Unit Converters

Weight and Mass Converter

Convert between kilograms, pounds, ounces, grams, stones, milligrams, tons, and metric tons.

Unit Converters

Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin, and Rankine temperature scales instantly and accurately.

Unit Converters

Speed Converter

Convert between mph, km/h, m/s, knots, and ft/s speed units with instant accurate results.

Unit Converters

Volume Converter

Convert between liters, gallons, fluid ounces, milliliters, cups, tablespoons, teaspoons, pints, and quarts.

Unit Converters

Area Converter

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

Unit Converters

Data Storage Converter

Convert between bytes, KB, MB, GB, TB, PB, and EB digital storage units quickly and accurately.

Unit Converters

Time Duration Converter

Convert between seconds, minutes, hours, days, weeks, months, and years for any time duration.

Unit Converters

Pressure Converter

Convert between pascals, bar, psi, atmospheres, mmHg, and torr pressure units instantly.

Unit Converters

Energy Converter

Convert between joules, calories, kilowatt-hours, BTU, and electron volts energy units.

Unit Converters

Fuel Efficiency Converter

Convert between miles per gallon (mpg), liters per 100km (L/100km), and kilometers per liter (km/L).

Unit Converters

Angle Converter

Convert between degrees, radians, gradians, and turns for any angle measurement quickly.

Unit Converters

Picking the Right Unit Converter

Each converter here handles one kind of measurement, so start with what you are measuring. Distances go in the Length Converter. Body weight or parcel weight goes in the Weight and Mass Converter. Type a value, pick the units, and the result updates as you type.

A few units trip people up. File sizes are one. A gigabyte can mean 1,000,000,000 bytes or 1,073,741,824 bytes. The Data Storage Converter lists both the decimal units (KB, MB, GB) and the binary units (KiB, MiB, GiB), so you can see the gap. Months and years vary in length too. The Time Duration Converter uses average values, so one year counts as 365.25 days.

For tire pressure, weather maps or gauges, the Pressure Converter covers psi, bar, pascals, atmospheres, mmHg and torr. If you compare US and European car figures, use the Fuel Efficiency Converter. The two scales run in opposite directions. A higher mpg is better, but a lower L/100km is better.