1 J
0.0002388 kcal
Joules to kcal Converter (Joules to Kilocalories)
1 joule = 0.0002388458966 kilocalories. To convert J to kcal, multiply by 0.0002388458966, or divide by 4,186.8.
1 kcal
4,186.8 J
10 J
0.002388 kcal
100 J
0.02388 kcal
How to convert Joules to kcal
1 joule equals 0.0002388458966 kilocalories, so the conversion is a single multiplication.
kcal = J × 0.0002388458966
Example: 150 J × 0.0002388458966 = 0.03583 kcal.
About the kilocalorie (food Calorie)
Kilocalorie (food Calorie) (kcal)
The kilocalorie is the “Calorie” on food labels. It's roughly the energy needed to warm 1 kg of water by 1 °C.
1 joule in every energy unit
Kilocalories0.0002388 kcal
Kilojoules0.001 kJ
Kilowatt-Hours2.778e-7 kWh
Calories0.2388 cal
British Thermal Units0.0009478 Btu
Watt-Hours0.0002778 Wh
Megajoules0.000001 MJ
Gigajoules1e-9 GJ
Megawatt-Hours2.778e-10 MWh
Therms (US)9.48e-9 thm
Electronvolts6.242e18 eV
Foot-Pounds0.7376 ft·lbf
Ergs10,000,000 erg
Related conversions
Joules to kcal FAQ
How many kilocalories are in a joule?
1 joule = 0.0002388458966 kilocalories.
How many joules are in a kilocalorie (food Calorie)?
1 kilocalorie (food Calorie) = 4,186.8 joules.
How do I convert J to kcal?
Use kcal = J × 0.0002388458966. For example, 10 J = 0.002388 kcal.
Can I print this Joules to kcal chart?
Yes. Use "Print / Save PDF" next to the converter for a one-page chart, or "Download CSV" to open it in Excel or Google Sheets.