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Converters
Energy Converter
Convert energy between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours and BTU. For nutrition, electricity bills and heating.
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Worked example
1 Joules = 0.001 Kilojoules
Units
Joules · Kilojoules · Calories · Kilocalories · Watt-hours · Kilowatt-hours · BTU
Frequently asked
Are food Calories kilocalories?
Yes — a dietary 'Calorie' is 1 kilocalorie (4,184 joules).
How many joules in a kWh?
3,600,000 joules.