100 Calories to kJ

The working

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

kJ, Calories and kcal

Calories are the unit most recipes and fitness apps use. A food Calorie, written Cal here and also called kcal, is 4.184 kJ, and kilojoules (kJ) are what many food labels show. 100 Cal is 418.4 kJ, so a tracker that says 100 Cal and a label that says 418.4 kJ describe the same energy.

This is a modest amount of energy, the size of a snack or a small drink.

For scale, half of this amount is 50 Cal, which is 209.2 kJ. Twice it is 200 Cal, which is 836.8 kJ.

Foods with about this much energy

• About the same as a pearOne serving is 100 Cal (418.4 kJ).
• About the same as an ear of cornOne serving is 100 Cal (418.4 kJ).
• About the same as a handful of roasted chestnutsOne serving is 100 Cal (418.4 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

11 to 31 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

• 80 Cal is 334.72 kJ
• 90 Cal is 376.56 kJ
• 110 Cal is 460.24 kJ
• 120 Cal is 502.08 kJ

• Previous: 90 Cal
• Next: 110 Cal
• The other way: 400 kJ to Calories
• All conversions