Energy converter
Convert food, electricity, heating and physics energy units.
100 Kilocalories (food Calories) = 418.4 Kilojoules
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About these units
Energy is the capacity to do work or produce heat. The SI unit is the joule. Electricity is billed in kilowatt-hours: one kWh is exactly 3.6 megajoules.
Food energy is given in kilocalories (the "Calories" on labels) or kilojoules. There are two calories: the thermochemical calorie of exactly 4.184 J, used for food, and the International Table calorie of 4.1868 J, used in engineering. Gas and heating in the US and UK use British thermal units and therms.
Popular conversions
- Kilocalories (food Calories) to Kilojoules
- Kilojoules to Kilocalories (food Calories)
- Joules to Calories (thermochemical)
- Calories (thermochemical) to Joules
- Kilowatt-hours to Joules
- Joules to Kilowatt-hours
- Kilowatt-hours to British thermal units
- British thermal units to Kilowatt-hours
- Kilowatt-hours to Megajoules
- Megajoules to Kilowatt-hours
- Kilowatt-hours to Kilocalories (food Calories)
- Kilocalories (food Calories) to Kilowatt-hours
- British thermal units to Joules
- Joules to British thermal units
- Kilojoules to Joules
- Joules to Kilojoules
- Watt-hours to Kilowatt-hours
- Kilowatt-hours to Watt-hours
- Megawatt-hours to Kilowatt-hours
- Kilowatt-hours to Megawatt-hours
- Therms to Kilowatt-hours
- Kilowatt-hours to Therms
- Kilocalories (food Calories) to Joules
- Joules to Kilocalories (food Calories)
- Kilocalories (food Calories) to Calories (thermochemical)
- Calories (thermochemical) to Kilocalories (food Calories)
- British thermal units to Kilojoules
- Kilojoules to British thermal units
- Electronvolts to Joules
- Joules to Electronvolts
- Foot-pounds to Joules
- Joules to Foot-pounds
- Gigajoules to Kilowatt-hours
- Kilowatt-hours to Gigajoules
- Watt-hours to Joules
- Joules to Watt-hours
- British thermal units to Kilocalories (food Calories)
- Kilocalories (food Calories) to British thermal units
- Kilocalories (International Table) to Kilojoules
- Megajoules to Kilocalories (food Calories)
Questions people ask
How many kilojoules are in a kilocalorie?
Exactly 4.184 kJ for the food (thermochemical) kilocalorie, as used on EU and US nutrition labels.
How many joules is a kWh?
Exactly 3 600 000 joules: 1000 watts for 3600 seconds.
Is a food Calorie the same as a calorie?
No. A food Calorie with a capital C is a kilocalorie, 1000 small calories.
Factors checked 19 October 2026.