If you are given the amount of energy as kilojoules, don’t think you’re off the hook. Excess kilojoules can add pounds to the waistline just like calories – that’s because they are basically the same. Both kilojoules and calories refer to a unit of energy. Although most nutrition labels list calories (especially in the U.S.), if you find a nutritional label that lists kilojoules, here is any easy way to convert to calories!

1 calorie = 4.2 kilojoules

For example: Let’s say the nutrition label says there are 252 kilojoules in a half cup of orange juice. That would equal approximately 60 calories (252 divided by 4.2 = 60).