kcal to kJ converter

1 kilocalory equals 4.184 kilojoules. Conversions use kJ = kcal × 4.184

kcal → 4.184 kJ

kJ = kcal × 4.184

Converter

Worked examples

1 kcal = 4.184 kJ
2 kcal = 8.368 kJ
5 kcal = 20.92 kJ
10 kcal = 41.84 kJ
100 kcal = 418.4 kJ

kilocalories (food calories) to kilojoules conversion table

kcal	kJ	Arithmetic
1 kcal	4.184 kJ	× 4.184
50 kcal	209.2 kJ	× 4.184
100 kcal	418.4 kJ	× 4.184
200 kcal	836.8 kJ	× 4.184
500 kcal	2,092 kJ	× 4.184
1000 kcal	4,184 kJ	× 4.184
2000 kcal	8,368 kJ	× 4.184
2500 kcal	10,460 kJ	× 4.184
2 kcal	8.368 kJ	× 4.184
3 kcal	12.552 kJ	× 4.184
4 kcal	16.736 kJ	× 4.184
5 kcal	20.92 kJ	× 4.184
6 kcal	25.104 kJ	× 4.184
8 kcal	33.472 kJ	× 4.184
10 kcal	41.84 kJ	× 4.184
12 kcal	50.208 kJ	× 4.184
15 kcal	62.76 kJ	× 4.184
20 kcal	83.68 kJ	× 4.184
25 kcal	104.6 kJ	× 4.184
30 kcal	125.52 kJ	× 4.184
40 kcal	167.36 kJ	× 4.184
60 kcal	251.04 kJ	× 4.184
70 kcal	292.88 kJ	× 4.184
80 kcal	334.72 kJ	× 4.184
90 kcal	376.56 kJ	× 4.184

How to convert kcal to kJ

Take your value in kilocalories (food calories).
Multiply by 4.184
That is your answer in kilojoules — no rounding needed until you choose a display precision.

Related conversions

kJ to kcal J to kJ kJ to J kJ to cal kJ to Wh kJ to kWh kJ to Btu cal to kJ kcal to J all energy units

Questions

How many kilojoules in 1 kilocalory?

Exactly 4.184 kJ. The factor follows from the definitions of both units, not from a measurement, so it is exact.

How do I convert kcal to kJ?

Multiply the kilocalories (food calories) figure by 4.184 — or use the converter above, which updates as you type.

Is kcal to kJ the same as kJ to kcal?

No — they are inverses. One kcal is 4.184 kJ, while one kJ is 0.23900574 kcal.

What is 1 kcal in kJ?

1 kcal = 4.184 kJ (see the value page for the full arithmetic).