Energy Converter
Convert between joules, calories, kilowatt-hours, BTU, electron volts, foot-pounds, and more
All processing happens in your browser. No data is uploaded.
Energy Converter
Convert between joules, calories, kilowatt-hours, BTU, electron volts, foot-pounds, and more
🔒All processing happens in your browser. No data is uploaded.
Joules (J)
Kilojoules (kJ)
Calories (cal)
Kilocalories (kcal)
Watt-hours (Wh)
Kilowatt-hours (kWh)
British Thermal Units (BTU)
Electron Volts (eV)
Foot-pounds (ft-lb)
Conversion Formulas
1 kJ = 1,000 J
1 cal = 4.184 J
1 kcal = 4,184 J
1 Wh = 3,600 J
1 kWh = 3,600,000 J
1 BTU = 1,055.06 J
1 eV = 1.602 x 10^-19 J
1 ft-lb = 1.355818 J