A calorie (cal) is a unit of energy, while a kilocalorie (kcal) is equal to 1,000 calories. In nutrition and food science, when people refer to "calories," they are actually talking about kilocalories. This can sometimes lead to confusion, which is why understanding the conversion between these units is important.
| Calories (cal) | Kilocalories (kcal) |
|---|---|
| 1,000 | 1 |
| 2,000 | 2 |
| 5,000 | 5 |
| 10,000 | 10 |
To convert calories to kilocalories, divide the number of calories by 1,000:
Formula: kcal = cal ÷ 1,000
Let's convert 2,500 calories to kilocalories:
2,500 cal ÷ 1,000 = 2.5 kcal
Understanding the relationship between calories and kilocalories is particularly important in:
When reading food labels: