Kilocalorie (kcal)
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A kilocalorie is the amount of heat needed to raise the temperature of 1 kilogram of water by 1°C; 1 kcal = 1,000 cal.
Detail
In nutrition and exercise contexts, the term "calorie" is frequently used for what is actually a kilocalorie (kcal). A kilocalorie is defined as the amount of heat needed to increase the temperature of 1 kilogram of water by 1° C. One kcal equals 1,000 cal.
Total caloric intake comes from the food and drink a person consumes. The carbohydrates, fats, and proteins in these foods contain energy that is expressed in terms of kcal.
Key facts
- 1 kcal = heat needed to raise 1 kg of water by 1°C.
- 1 kcal = 1,000 cal.
- The everyday "calorie" in nutrition usually means a kilocalorie.
Connections
- Caloric Balance (Energy Balance) — the unit used in the energy-balance equation.
- Macronutrients as Energy Sources — carbs, fats, and proteins supply kcal.
Sources
See how this applies in practice, with honest limits on what the plan changes.
Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.