Convert Calories (cal) to Kilocalories (kcal)
Enter a value below to convert Calories (cal) to Kilocalories (kcal).
Conversion:
1 Calories (cal) = 0.001 Kilocalories (kcal)
How to Convert Calories (cal) to Kilocalories (kcal)
1 cal = 0.001 kcal
1 kcal = 1000 cal
Example: convert 15 Calories (cal) to Kilocalories (kcal):
25 cal = 0.025 kcal
Calories (cal) to Kilocalories (kcal) Conversion Table
| Calories (cal) | Kilocalories (kcal) |
|---|---|
| 0.01 cal | 0.00001 kcal |
| 0.1 cal | 0.0001 kcal |
| 1 cal | 0.001 kcal |
| 2 cal | 0.002 kcal |
| 3 cal | 0.003 kcal |
| 5 cal | 0.005 kcal |
| 10 cal | 0.01 kcal |
| 20 cal | 0.02 kcal |
| 50 cal | 0.05 kcal |
| 100 cal | 0.1 kcal |
| 1000 cal | 1 kcal |
Calories (cal)
Definition
A calorie (cal), also known as a small calorie or gram calorie, is defined as the amount of heat energy needed to raise the temperature of one gram of water by one degree Celsius. It equals approximately 4.184 joules.
History
The calorie was first defined by French chemist Nicolas Clément in 1824. It was widely used in chemistry and physiology before the joule became the official SI unit of energy.
Current use
Small calories are used in chemistry and physics for heat measurements. In everyday language, 'calorie' often refers to the kilocalorie (kcal) when discussing food energy.
Kilocalories (kcal)
Definition
A kilocalorie (kcal), also known as a food calorie or large calorie, equals 1,000 small calories or approximately 4,184 joules. It is the standard unit for measuring dietary energy.
History
The kilocalorie became the standard unit for food energy labeling in the United States and many other countries during the 20th century. Nutritionist Wilbur Olin Atwater pioneered its use in dietary science.
Current use
Kilocalories are the primary unit for food energy on nutrition labels in the US, Canada, and much of Asia. They are also used in exercise science, dietetics, and metabolic rate calculations.