Unit converters
Convert length, weight, volume, temperature, speed, energy, pressure and data sizes. Enter a value, pick your units and see the result in other common units as well.
- Units
Data storage converter
Convert decimal storage units (powers of 1,000) and binary units (powers of 1,024), such as GB to GiB. One byte is eight bits.
Open tool - Units
Data transfer time calculator
Estimate how long a download or upload takes from file size and connection speed. Uses eight bits per byte. Real transfers can take longer because of overhead or congestion.
Open tool - Units
Bandwidth converter
Convert bits per second and bytes per second, such as Mbps to MB/s. One byte is eight bits; k, M and G use powers of 1,000.
Open tool - Units
Length converter
Convert metric length and international inches, feet, yards and miles. One inch is exactly 0.0254 metres.
Open tool - Units
Area converter
Convert square metric units, international square feet and yards, acres and hectares. One hectare is 10,000 square metres.
Open tool - Units
Volume converter
Convert litres, cubic metres and US liquid measures, from gallons to teaspoons. A US cup is 8 US fluid ounces; these are not Imperial measures.
Open tool - Units
Mass converter
Convert metric mass, avoirdupois pounds and ounces. One pound is exactly 0.45359237 kilograms. This converts mass, not force.
Open tool - Units
Temperature converter
Convert Celsius, Fahrenheit and kelvin temperatures. Reject temperatures below absolute zero. Converts temperatures, not temperature differences.
Open tool - Units
Speed converter
Convert metres per second, kilometres per hour, miles per hour, knots and feet per second. One knot is one nautical mile per hour.
Open tool - Units
Energy converter
Convert energy in joules, watt-hours, thermochemical calories and International Table British thermal units (BTU). A food Calorie is one kilocalorie.
Open tool - Units
Power converter
Convert watts, kilowatts, megawatts and mechanical horsepower. Mechanical horsepower is 550 foot-pounds-force per second, about 745.7 watts.
Open tool - Units
Pressure converter
Convert absolute pressure in pascals, bar, atmospheres, psi and torr. This does not convert gauge pressure to absolute pressure.
Open tool - Units
Fuel economy converter
Convert fuel economy between US mpg, UK (Imperial) mpg, liters per 100 km and km per liter. Enter up to 100 values, one per line.
Open tool - Units
Angle converter
Convert an angle between degrees, radians, gradians, turns, arcminutes, arcseconds and degrees, minutes and seconds (DMS).
Open tool