Calorie & kJ Converter
UNIT CONVERTERS
Calorie & kJ Converter
Switch between food calories and kilojoules.
UNDERSTAND YOUR RESULT
How it works
Kilocalories and kilojoules are two units of energy. A food Calorie means a kilocalorie.
THE CALCULATION1 kcal = 4.184 kJ
Using this calculator
Enter an amount and choose the source unit. The result uses the thermochemical conversion constant.
What to keep in mind
Do not confuse a small calorie (cal) with a food Calorie (kcal): one kilocalorie equals 1,000 small calories.
Frequently asked questions
Are my entries saved?
No. Calculator inputs remain in the current page and are cleared when you reload or leave. The tools do not upload your entries.
Why are results rounded?
The display is rounded for readability. Calculations use unrounded intermediate values. An estimate should not be interpreted as an exact measurement.