Calories to Joules

Convert calories to joules. Live result, plus a quick-reference table for common values.

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⇆ Convert Joules to Calories instead

Frequently asked questions

How do I convert calories to joules?

Multiply the calorie value by 4.184. So 1 calorie = 4.184 J, and the calculator above does it instantly for any number.

How many joules are in a calorie?

There are 4.184 joules in one calorie. The reference table shows the conversion for common values.

Is this cal to J converter free?

Yes, completely free, no sign-up, and it runs entirely in your browser, so nothing is uploaded.