Energy Converter

Convert between joules, kilowatt-hours, and calories (thermochemical or food).

Energy Converter

Value

From unit

To unit

Result

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How it works

1 kWh = 3.6e6 J. 1 cal (thermochemical) ≈ 4.184 J. Food calories are kilocalories (kcal).

When to use it

Use for physics, electricity bills, or nutrition.

Frequently asked questions

Food vs physics calories?

Food 'calories' are kilocalories (kcal) = 1000 cal. We label which we use.