Small and large calories
Calories can be small or large.
- A large calorie estimates the amount of energy needed to raise the temperature of 1 kg (2.2 pounds) of water by 1°C (34°F).
- A small calorie estimates the amount of energy it takes to raise the temperature of 1 gram (0.035 ounces) of water by 1°C (34°F)
This means that 1 large calorie = 1,000 small calories, as 1 kg = 1,000 grams.
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