What are kilojoules?
Kilojoules (kJ) are similar to calories. They are both used to measure the energy value of food as well as the amount of energy our bodies burn during various activities like exercising. The main difference between kilojoules and calories is that kilojoules are a smaller unit of measurement. One calorie equals about 4 kilojoules. For example, a small apple has about 53 calories or 222 kilojoules.
How to quickly estimate kilojoules
If you know the number of kilojoules, you can quickly estimate the number of calories by dividing by four, and if you know the number of calories, simply multiply by four to get the approximate number of kilojoules.
Kilojoules / 4 = Calories
4 x Calories = Kilojoules
The table below lists some common food items along with their calories and kilojoules.
Calories and Kilojoules
|hard boiled egg||78||326|
|1 slice bread||66||276|
|3 oz chicken breast||142||594|