What's the difference between 'calorie' and 'Calorie'?

A food Calorie (capital C) is actually a kilocalorie — 1,000 small calories — which is why nutrition labels use kcal.

Energy Converter

Convert an energy value in joules to calories, kilocalories (food calories), and kilowatt-hours.

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Formula

1 J = 0.239 cal = 0.000239 kcal = 2.778×10⁻⁷ kWh

Prefer a quick-reference chart instead? Joules to Calories

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How joules convert to kilowatt-hours, and PSI converts to bar, with real utility-bill and tire-pressure examples.

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