cal / kJ

Calorie to Kilojoule converter

1 cal = 0.004184 kJ

This is the Calorie to Kilojoule converter. The factor is fixed: 1 cal = 0.004184 kJ. Open a common amount below, or type any value — only selected amounts are indexed.

Common values

kilojoule to calorie 2 calories in kilojoule 5 calories in kilojoule 10 calories in kilojoule 20 calories in kilojoule 25 calories in kilojoule 50 calories in kilojoule 75 calories in kilojoule 100 calories in kilojoule 120 calories in kilojoule 150 calories in kilojoule

Same amount, other units

1 calorie → kcal 1 calorie → BTU 1 calorie → kWh 1 calorie → MJ

Formula: calorie to kilojoule

kJ = cal × 0.004184 (1 CAL = 0.004184 KJ)

Reference values: calorie → kilojoule

cal	kJ
1 cal	0.004184 kJ
100 cal	0.4184 kJ
200 cal	0.8368 kJ
500 cal	2.092 kJ
1000 cal	4.184 kJ
2000 cal	8.368 kJ

Common conversions

1 cal → 0.004184 kJ 2 cal → 0.008368 kJ 5 cal → 0.02092 kJ 10 cal → 0.04184 kJ 20 cal → 0.08368 kJ 25 cal → 0.1046 kJ 50 cal → 0.2092 kJ 75 cal → 0.3138 kJ 100 cal → 0.4184 kJ 120 cal → 0.50208 kJ 150 cal → 0.6276 kJ 200 cal → 0.8368 kJ

FAQ for cal → kJ

Why do labels show both kcal and kJ?

Many regions require both. Roughly 1 kcal = 4.184 kJ. Use the calculator for any amount.

Is a food “Calorie” the same as a kilocalorie?

Yes. On labels, Calorie almost always means kilocalorie (kcal).

Manual conversion?

kJ = cal × 0.004184 (1 CAL = 0.004184 KJ)

Reverse conversion?

1 kilojoule ≈ 239.005736 calorie. Swap units in the form or use the reverse link.

How much is 1 calorie on a food label in kilojoule?

0.004184 kilojoule. Factor 1 calorie = 0.004184 kilojoule.

How the Calorie to Kilojoule converter works

This hub describes the pair, not a single number. Pages like 1, 10 or 100 Calorie answer exact searches.

NiftyRecipe uses thermochemical energy factors (for example 1 kcal = 4184 J). Results do not change with the time of day.