Energy Unit Converter

Convert joules, calories, kWh, BTU and watt-hours.

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How to use

Enter energy and convert between 7 units.

Are food calories the same as physics calories?

Food 'calories' are kilocalories: 1 food Cal = 1,000 physics cal = 4,184 J.

How many kWh in 1 BTU?

0.000293 kWh. One kWh = 3,412 BTU.

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