Energy: kilojoules to kilocalories and kilowatt-hours

Convert energy between kilojoules, kilocalories and kilowatt-hours. Useful for food energy and electricity.

Food: kilojoules and kilocalories

1 kilojoule (kJ) kJ to kcal = 0.2388459 kilocalories
1 kilocalory (kcal) kcal to kJ = 4.1868 kilojoules
1 calory (cal) cal to J = 4.1868 joules

Electricity and engineering

1 kilowatt hour (kWh) kWh to MJ = 3.6 megajoules
1 megajoule (MJ) MJ to kWh = 0.27777778 kilowatt hours
1 watt hour (Wh) Wh to kJ = 3.6 kilojoules

Overview table

kilocalories kilojoules
50 209.34
100 418.68 small snack
250 1046.7
500 2093.4 hearty main meal
1000 4186.8
2000 8373.6 approx. daily intake of an adult
2500 10467

Other tables