Units & measures

Online converters

Fast unit conversions with clear source values, useful equivalents, and exact relationships where they matter.

Conversion library

Conversion tools

19 focused converters for measurements and everyday unit changes.

19 converters available

Length Converter

Convert metric, US, imperial, and nautical length units.

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Weight Converter

Convert metric and US/imperial weight units, including distinct tons.

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Temperature Converter

Convert Celsius, Fahrenheit, Kelvin, and Rankine temperatures.

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Volume Converter

Convert metric, cubic, US liquid, and imperial volume units.

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Area Converter

Convert square metric and imperial units, acres, and hectares.

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Speed Converter

Convert mph, km/h, m/s, ft/s, and knots.

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Time Duration Converter

Convert milliseconds, seconds, minutes, hours, days, and weeks.

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Data Storage Converter

Convert bits, bytes, decimal storage units, and binary storage units.

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Fuel Economy Converter

Convert US and Imperial mpg, L/100 km, and km/L.

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Pressure Converter

Convert Pa, kPa, MPa, bar, psi, atm, and mmHg.

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Energy Converter

Convert joules, watt-hours, calories, BTU, and foot-pounds.

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Power Converter

Convert watts, horsepower, BTU per hour, and foot-pounds per second.

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Force Converter

Convert newtons, pound-force, kilogram-force, dynes, and poundals.

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Torque Converter

Convert newton-meters, pound-feet, pound-inches, and kilogram-force torque.

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Acceleration Converter

Convert metric, imperial, velocity-change, standard gravity, and Gal units.

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Density Converter

Convert metric and US customary mass-per-volume density units.

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Angle Converter

Convert degrees, radians, gradians, turns, arcminutes, and arcseconds.

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Frequency Converter

Convert hertz, SI frequency units, cycles per minute, RPM, and radians per second.

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Flow Rate Converter

Convert metric, US gallon, and cubic-feet-per-minute volume flow rates.

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Transparent conversions

Choose units and get the equivalent

These converters run entirely in your browser and use defined conversion factors, so no account, upload, or external lookup is required.

Each tool includes common reference values, a worked example, and notes about definitions or rounding that can affect the result.