Everything in its units.

Convert plane angles among degrees, radians, gradians, turns and multiples of π, with an exact degrees-minutes-second...

Convert density among kg/m³, g/cm³, kg/L, g/L, lb/ft³, lb/in³ and oz/in³ using NIST-derived exact base-unit relations...

Convert energy among joules, kJ, MJ, Wh, kWh, thermochemical calories, kcal, Btu (IT) and foot-pound-force using NIST...

Convert force among newtons, kilonewtons, dynes, kilogram-force, pound-force, ounce-force and poundals using NIST def...

Convert power among watts, kW, MW, mechanical hp, metric PS, Btu (IT)/h, kcal/h and foot-pound-force per second.

Convert pressure among Pa, kPa, MPa, bar, mbar, atmosphere, psi, torr, mmHg, inHg and kgf/cm² using named NIST factors.

Convert torque among newton-metres, pound-feet, pound-inches, kilogram-force metres and dyne-centimetres using NIST f...

Convert within absorbed dose, equivalent dose, or radioactivity units while keeping gray, sievert and becquerel quant...