- How many kJ should I eat per dayLabels use a single reference day, but your body has its own number. Here is how the reference works and how to estimate your own.
- Read a nutrition label (kJ and kcal)The energy line is the easiest part of a label to misread. Here is how to read a nutrition label correctly, and how to convert what you find.
- kJ in common foodsApproximate energy for everyday foods, shown in both kilojoules and calories.
Last updated 11 Oct 2026. How we calculate.