Kilojoules to Kilocalories

One kilojoule equals 0.239006 kilocalories.

Kilocalories = kilojoules ÷ 4.184

By Piero Nanni · Last checked 26 September 2026

Kilojoules to Kilocalories Calculator

From

Common Conversions

How to Convert Kilojoules to Kilocalories

Formula:

Kilocalories = kilojoules ÷ 4.184

Worked example:

1500 kilojoules ÷ 4.184 = 358.5086 kilocalories

Kilojoules to Kilocalories Conversion Table

kJ	kcal
100	23.9006
150	35.8509
200	47.8011
250	59.7514
300	71.7017
400	95.6023
500	119.5029
600	143.4034
700	167.304
750	179.2543
800	191.2046
900	215.1052
1000	239.0057
1500	358.5086
2000	478.0115
2500	597.5143
3000	717.0172
4000	956.0229
5000	1195.0287
6000	1434.0344
7000	1673.0402
7500	1792.543
8000	1912.0459
8700	2079.3499
9000	2151.0516
10000	2390.0574

About This Conversion

Kilojoules to kilocalories divides by 4.184, the conversion needed to read a European or Australian food label in the Calorie figures used in the US and UK.

A rough mental version is to divide by four and take off a little, which is accurate to about 4 percent: 500 kJ estimated as 125 kcal is really 119.5. For counting over a day the exact divisor is worth using, since the error compounds across every entry.

Australian and New Zealand labels give kilojoules only, which is where this conversion earns its keep. The reference daily intake printed on those labels, 8,700 kJ, is about 2,080 kcal. EU and UK labels print both figures per 100 g, and because each is rounded separately the pair will not always divide to exactly 4.184.