Unit converters
Unit converters: 16 free calculators & tools, including Length converter and Area converter. Explore formulas, examples and visual explanations.
Unit converters
Length converter
Convert metric, imperial and nautical lengths using named unit definitions.
Area converter
Convert surface areas between metric, imperial and land-measurement units.
Mass and weight converter
Convert mass units while keeping ordinary ounces and troy ounces distinct.
Volume converter
Convert volumes with explicit distinctions between US and imperial liquid units.
Speed converter
Compare speeds expressed in metric, imperial and nautical units.
Energy converter
Compare joules, watt-hours, calories and other supported energy units.
Power converter
Convert power units with separate definitions for mechanical and metric horsepower.
Pressure converter
Convert pressure units while preserving your chosen absolute or gauge reference.
Temperature converter
Convert absolute temperatures or temperature differences across Celsius, Fahrenheit and Kelvin.
Force converter
Convert force between newtons, pounds-force, kilogram-force and dynes.
Torque converter
Convert torque between N·m, N·cm, N·mm, lb·ft, lb·in and kgf·m.
Acceleration converter
Convert acceleration between SI, feet per second squared and standard gravity.
Volume flow-rate converter
Convert liquid volume per time, including distinct US and Imperial gallons.
Angle converter
Convert degrees, radians, gradians and turns with an angle diagram.
Density, mass and volume
Solve for density, mass or volume, or convert density units.
