Energy Converter

Convert between Energy units. Choose from 20 different units including Joules, Kilojoules, Megajoules.

Popular Conversions

Joules → Calories Calories → Joules Kilojoules → Kilocalories Kilocalories → Kilojoules Kilowatt-Hours → Joules Joules → Kilowatt-Hours BTU → Joules Joules → BTU Kilowatt-Hours → Megajoules Electron Volts → Joules Ergs → Joules Foot-Pounds → Joules Megajoules → Kilowatt-Hours Kilocalories → BTU Therms → Kilowatt-Hours Horsepower-Hours → Kilowatt-Hours Calories → Kilojoules Kilojoules → BTU Megawatt-Hours → Kilowatt-Hours

All Units

FromJoules (J)
Joules (J)1
Kilojoules (kJ)1000
Megajoules (MJ)1000000
Gigajoules (GJ)1000000000
Millijoules (mJ)0.001
Watt-Hours (Wh)3600
Kilowatt-Hours (kWh)3600000
Megawatt-Hours (MWh)3600000000
Calories (cal)4.184
Kilocalories (kcal)4184
Calories (nutritional) (Cal)4184
BTU (BTU)1055.06
Therms (therm)105506000
Ergs (erg)1e-7
Electron Volts (eV)1.602e-19
Kiloelectron Volts (keV)1.602e-16
Megaelectron Volts (MeV)1.602e-13
Foot-Pounds (ft·lbf)1.35582
Horsepower-Hours (hp·h)2684520
Tons of TNT (tTNT)4184000000