How do I convert kilojoules back to kilocalories?

Use the reverse converter: 1 kilojoule equals 0.239006 kcal.

Is this converter accurate?

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert kilocalories to kilojoules, multiply the value by 4.184.

kJ = kcal × 4.184

40 kcal × 4.184 = 167.36 kJ

Kilocalorie (kcal): The "food calorie" on nutrition labels. Equal to 4,184 joules.
Kilojoule (kJ): 1,000 joules; used for food energy in Australia, New Zealand and much of Europe.

How do I convert kilocalories to kilojoules?: To convert kilocalories to kilojoules, multiply the value by 4.184.
How many kilojoules are in 1 kilocalorie?: 1 kilocalorie equals 4.184 kJ.
How many kilojoules are in 10 kilocalories?: 10 kcal equals 41.84 kJ.
How do I convert kilojoules back to kilocalories?: Use the reverse converter: 1 kilojoule equals 0.239006 kcal.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.