1 kilocalorie in kilojoule

4.184 kilojoule

1 kcal = 4.184 kJ · factor

Nutrition packaging often lists both kcal and kJ. This tool applies a fixed conversion ratio only.

Common values

kilojoule to kilocalorie 2 kilocalories in kilojoule 5 kilocalories in kilojoule 10 kilocalories in kilojoule 20 kilocalories in kilojoule 25 kilocalories in kilojoule 50 kilocalories in kilojoule 75 kilocalories in kilojoule 100 kilocalories in kilojoule 120 kilocalories in kilojoule 150 kilocalories in kilojoule

Same amount, other units

1 kilocalorie → cal 1 kilocalorie → kWh 1 kilocalorie → BTU 1 kilocalorie → MJ 1 kilocalorie → J 1 kilocalorie → Wh

Formula: kilocalorie to kilojoule

kJ = kcal × 4.184 (1 KCAL = 4.184 KJ)

Reference values: kilocalorie → kilojoule

kcal	kJ
1 kcal	4.184 kJ
100 kcal	418.4 kJ
200 kcal	836.8 kJ
500 kcal	2092 kJ
1000 kcal	4184 kJ
2000 kcal	8368 kJ

All amounts for this pair

FAQ for kcal → kJ

1 kilocalorie in kilojoule

1 kilocalorie is 4.184 kilojoule using the standard food-energy factor on NiftyRecipe.

Package labels, recipe macros and fitness apps often jump between kilocalories and smaller calorie units (or kilojoules). Here the ratio stays constant: 1 kilocalorie = 4.184 kilojoule, so 1 kilocalorie always maps to 4.184 kilojoule until you change the input. The reverse figure is 1 kilojoule ≈ 0.239006 kilocalorie.

Use the field above to try another portion size, scale a recipe, or match two apps that print different units. Everything on this page stays inside nutrition-style energy units-no length, temperature or other measures mixed in.