Calorie vs kilocalorie?

Food labels say "Calories" with a capital C — those are kilocalories (kcal). 1 food Calorie = 1,000 thermodynamic calories = 4,184 J.

A British Thermal Unit is the energy to raise 1 lb of water by 1°F — about 1,055 J. It is common in heating and cooling specs.

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Energy Converter

Convert energy units: joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, and electronvolts.

Joules (J)

Kilojoules (kJ)

Calories (cal)

Kilocalories (kcal / Cal)

Watt-hours (Wh)

Kilowatt-hours (kWh)

BTU

Electronvolts (eV)