100 kJ to Calories

The working

Shown to 2 decimal places, as the app shows it. One food Calorie (kcal) is 4.184 kilojoules.

kJ, Calories and kcal

Kilojoules (kJ) are the metric unit of energy, and food labels in Australia, New Zealand, the UK and the EU give energy in them. A food Calorie, written Cal here and also called kcal, is the other common unit. 100 kJ is 23.9 Cal, so a label that says 100 kJ and a tracker that says 23.9 Cal describe the same energy.

This is a small amount of energy, closer to a single piece of fruit or a drink than to a meal.

For scale, half of this amount is 50 kJ, which is 11.95 Cal. Twice it is 200 kJ, which is 47.8 Cal.

Foods with about this much energy

• About the same as a carrotOne serving is 25 Cal (104.6 kJ).
• About the same as a tomatoOne serving is 22 Cal (92.05 kJ).
• About the same as a cucumberOne serving is 30 Cal (125.52 kJ).

These are everyday single-serving estimates from the app's food list, not nutrition labels. Recipes and portions vary. See the whole list.

Walking guide

2 to 8 min of walking.

Adult reference guide: 45 to 120 kg at a reference walking pace. Actual times may be outside this range. The exercise page lists the other activities.

Nearby values

• 50 kJ is 11.95 Cal
• 150 kJ is 35.85 Cal
• 200 kJ is 47.8 Cal

• Previous: 50 kJ
• Next: 150 kJ
• The other way: 25 Calories to kJ
• All conversions