Definition: A kilocalorie, often just called 'calorie' in dietary contexts, is the amount of energy required to raise the temperature of one kilogram of water by one degree Celsius.
History/origin: The calorie was originally defined in the 19th century as a unit of heat energy.
Current use: Kilocalories are commonly used to express the energy content of foods in many countries, especially in nutrition and dietetics.
Definition: A calorie is a unit of energy, defined as the amount of energy needed to raise the temperature of one gram of water by one degree Celsius.
History/origin: The calorie was first defined in the 19th century and is often used in chemistry and physics.
Current use: Calories are used to measure small amounts of energy, often in scientific contexts and older nutrition references.
| Kilocalories (kcal) | Calories (cal) |
|---|---|
| 1.000 | 1000 |
| 2.000 | 2000 |
| 5.000 | 5000 |
| 10.000 | 10000 |
| 15.000 | 15000 |
| 20.000 | 20000 |
| 0.500 | 500 |
| 0.100 | 100 |
| 7.500 | 7500 |
| 12.300 | 12300 |
1 kilocalorie = 1000 calories
1 calorie = 0.001 kilocalories
Example: convert 5 kilocalories to calories:
5 × 1000 = 5000 calories