Convert energy measurements between joules, calories, watt-hours, kilowatt-hours and BTU.
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Result
0.001 kJ
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This tool converts between energy units using fixed conversion factors, for example, 1 kilowatt-hour equals 3,600,000 joules, 3,412 BTU, or roughly 860 kilocalories. Enter a value in any supported unit and it's converted to all others using these standard ratios.
Joules and kilojoules are the SI standard used in physics and on food labels in many countries. Calories and kilocalories (the 'Calories' on US food labels) measure food energy. Kilowatt-hours are used for electricity billing, and BTU is common for rating heating, cooling and appliance energy use in the US.
Multiply kilowatt-hours by 3,600,000 to get joules, or use this converter for an instant result.
A food 'Calorie' (capital C) is actually a kilocalorie, equal to 1,000 small calories. This converter's 'calorie' and 'kilocalorie' units follow that same distinction.
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