kcal to kJ

Convert kilocalories to kilojoules with visual comparison bars

100 kcal × 4.184 = 418.400 kJ

Result

418.4 kJ

Kilocalories (kcal)100Kilojoules (kJ)418.4

About this calculator

Convert kilocalories (food Calories) to kilojoules instantly. Nutritional labels in many countries use kilojoules while others list kilocalories — this converter lets you switch between them with precision. One kilocalorie equals exactly 4.184 kilojoules by definition.

Common examples

  • 1 kcal = 4.184 kJ
  • 100 kcal = 418.400 kJ — a small snack
  • 250 kcal = 1046.000 kJ — a light meal
  • 500 kcal = 2092.000 kJ — a moderate meal
  • 2000 kcal = 8368.000 kJ — typical daily intake