Kilojoule to Kilocalorie Converter

Energy Converter

27 units available

Decimals:

From

To

0.239006

1 kJ = 0.239006 kcal

Formula:

kcal = kJ × 0.2390057361

With your value: 1 kJ = 0.23900574 kcal

How big is that?

Everyday references on a logarithmic scale, all expressed in kilojoule so you can sanity-check the result.

Heartbeat (1/1.0e+3 your value)0.00100 kJ

Your value1.00 kJ

AA battery charge (10× your value)10.0 kJ

Slice of bread (2.8e+2× your value)280 kJ

Daily food intake (8.4e+3× your value)8.40e+3 kJ

Litre of petrol (3.4e+4× your value)3.42e+4 kJ

Other Kilojoule to Kilocalorie conversions

2 kJ to kcal 3 kJ to kcal 4 kJ to kcal 5 kJ to kcal 6 kJ to kcal 7 kJ to kcal 8 kJ to kcal

Kilojoule to Kilocalorie Conversion Table

Kilojoule (kJ)	Kilocalorie (kcal)
0.5	0.119503
1	0.239006
2	0.478011
5	1.195029
10	2.390057
15	3.585086
20	4.780115
25	5.975143
50	11.950287
100	23.900574
250	59.751434
500	119.502868
1000	239.005736

Kilocalorie to Kilojoule Conversion Table

Kilocalorie (kcal)	Kilojoule (kJ)
0.5	2.092
1	4.184
2	8.368
5	20.92
10	41.84
15	62.76
20	83.68
25	104.6
50	209.2
100	418.4
250	1,046
500	2,092
1000	4,184

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Kilojoule (kJ)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Kilocalorie (kcal)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Kilojoule to Kilocalorie

To convert from Kilojoule (kJ) to Kilocalorie (kcal), multiply the value by 0.2390057361.

Formula: kcal = kJ × 0.2390057361

Reverse: kJ = kcal × 4.184

Step-by-Step Example

Start with your value in Kilojoule. For example: 5 kJ
Multiply by the conversion factor: 5 x 0.2390057361
The result is: 1.195029 kcal

About Kilojoule

The kilojoule (kJ) is a unit of energy and work. One kilojoule equals 1000 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

About Kilocalorie

The kilocalorie (food Calorie) equals 1,000 calories or 4,184 joules. It is the standard unit for food energy content.

Common uses: nutrition, diet, food labeling.

Frequently Asked Questions

How many Kilocalorie are in 1 Kilojoule?

There are exactly 0.2390057361 Kilocalorie in 1 Kilojoule. This means the conversion factor from Kilojoule to Kilocalorie is 0.2390057361.

What is the formula to convert Kilojoule to Kilocalorie?

The formula to convert Kilojoule to Kilocalorie is: kcal = kJ × 0.2390057361. For example, to convert 10 Kilojoule to Kilocalorie, you would multiply 10 by 0.2390057361.

What is a Kilojoule?