How many kilocalories are in a kilojoule?

1 kJ = 0.239006 kcal. To convert any amount, multiply by 0.239006.

How do you convert kilojoules to kilocalories?

Multiply the number of kilojoules by 0.239006 to get kilocalories. The formula is shown in the "How it's calculated" section above.

Where does the conversion factor come from?

It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.

Unit converter — Energy

Kilojoules to kilocalories converter

Convert kilojoules (kJ) to kilocalories (kcal). Source-cited conversion factor, exact to the displayed precision.

Results are mathematically exact for the displayed precision. How we calculate.

How it's calculated

Convert kilojoules to kilocalories— the formula

Kilojoules convert to kilocalories by multiplying by the published conversion factor. The factor below is exact to the precision shown, sourced from the citation under the formula.

kcal = kJ × 0.239006

kJ = kcal × 4.184

Joule: SI derived. 1 cal (thermochemical) = 4.184 J exactly; 1 kcal = 1000 cal. 1 kWh = 3,600,000 J exactly. 1 BTU (IT) = 1055.05585262 J (NIST SP 811).

Questions

Frequently asked questions

How many kilocalories are in a kilojoule?
1 kJ = 0.239006 kcal. To convert any amount, multiply by 0.239006.
How do you convert kilojoules to kilocalories?
Multiply the number of kilojoules by 0.239006 to get kilocalories. The formula is shown in the "How it's calculated" section above.
Where does the conversion factor come from?
It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.