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Energy Converter

Convert energy units: joules, kilojoules, calories, kilocalories, kilowatt-hours, BTUs and more. Free and accurate.

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Energy Converter — joules, calories, kWh, BTU

Convert energy units: joules, kilojoules, calories, kilocalories, kilowatt-hours, BTUs and more. Free and accurate.

FAQ

How many calories in a kilocalorie?
1 kilocalorie (kcal) = 1,000 calories (cal).
How many joules in a kilowatt-hour?
1 kWh = 3,600,000 joules.
What is a BTU?
BTU = British Thermal Unit. 1 BTU = 1,055.06 joules.