energy converter
convert energy and work between joules, calories, kilocalories, kilowatt-hours and btu.
runs on your device · free · no sign-up
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frequently asked questions
is a food calorie the same as a calorie?
a food "calorie" is really a kilocalorie (kcal), which is 1,000 small calories or 4.184 kJ.
how many joules in a kWh?
3,600,000 joules.
what is a btu?
a british thermal unit, the heat to warm one pound of water by 1 °F, about 1,055 J.