How many megajoules are in 1 kilocalorie?

1 kilocalorie equals 0.004184 MJ.

How do I convert megajoules back to kilocalories?

Use the reverse converter: 1 megajoule equals 239.006 kcal.

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

To convert kilocalories to megajoules, multiply the value by 0.004184.

MJ = kcal × 0.004184

40 kcal × 0.004184 = 0.1674 MJ

Kilocalorie (kcal): The "food calorie" on nutrition labels. Equal to 4,184 joules.
Megajoule (MJ): 1,000,000 joules; used for fuel and industrial energy.

How do I convert kilocalories to megajoules?: To convert kilocalories to megajoules, multiply the value by 0.004184.
How many megajoules are in 1 kilocalorie?: 1 kilocalorie equals 0.004184 MJ.
How many megajoules are in 10 kilocalories?: 10 kcal equals 0.04184 MJ.
How do I convert megajoules back to kilocalories?: Use the reverse converter: 1 megajoule equals 239.006 kcal.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.