kcal / kJ

Kilocalorie to Kilojoule converter

1 kcal = 4.184 kJ

This is the Kilocalorie to Kilojoule converter. The factor is fixed: 1 kcal = 4.184 kJ. Open a common amount below, or type any value — only selected amounts are indexed.

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

Common conversions

1 kcal → 4.184 kJ 2 kcal → 8.368 kJ 5 kcal → 20.92 kJ 10 kcal → 41.84 kJ 20 kcal → 83.68 kJ 25 kcal → 104.6 kJ 50 kcal → 209.2 kJ 75 kcal → 313.8 kJ 100 kcal → 418.4 kJ 120 kcal → 502.08 kJ 150 kcal → 627.6 kJ 200 kcal → 836.8 kJ

FAQ for kcal → kJ

Manual conversion?

kJ = kcal × 4.184 (1 KCAL = 4.184 KJ)

Reverse conversion?

1 kilojoule ≈ 0.239006 kilocalorie. Swap units in the form or use the reverse link.

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

4.184 kilojoule. Factor 1 kilocalorie = 4.184 kilojoule.

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).

How the Kilocalorie to Kilojoule converter works

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

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