Energy Converter
Convert between joules, calories, watt-hours, kWh and BTU.
Enter values
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The formula
result = value × (factorₓ / factorᵧ)
All calculations run locally in your browser and update instantly as you type.
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Frequently asked questions
How many joules in a calorie?+
One (thermochemical) calorie equals 4.184 joules.
All calculations run locally in your browser. Nothing you type is sent to a server.