Calories are a unit of energy. We often associate calories with food, but in fact they apply to anything that contains energy. For example, 4 liters of gasoline contains about 3. 1 10 million calories.

Simply put, the energy or heat of 1 calorie can raise the temperature of 1 gram of water by 1 degree Celsius at one atmospheric pressure. 1 calorie is about 4. 186 joules.

Commonly used conversions:

1 kj = 1000 kj

1 kcal =4 186 kj =4. 186 kj

1 kcal = 1000 kcal

Therefore:

1000 kj = 1000÷4. 186 kcal ≈238.89 15 kcal =23889 15 kcal