How do you convert calories to joules?

Multiply calories by 4.184 to get joules.

No. This page uses small calories (cal), not kilocalories (kcal).

Are my inputs stored?

No. All calculations run locally in your browser.

Convert energy from calories (cal) to joules (J). Includes rounding controls, quick references, and input validation.

Energy (calories)

Enter calories and convert. Press Ctrl/Cmd + Enter.

Rounding

Result will appear here.

Reference	cal	J

Privacy: runs locally in your browser. No inputs are stored or transmitted.

J = cal × 4.184
Reverse: cal = J ÷ 4.184

How do you convert calories to joules?
Multiply calories by 4.184 to get joules.
What is 1 calorie in joules?
1 calorie equals 4.184 joules.
Is this kcal?
No. This page uses small calories (cal), not kilocalories (kcal).
Are my inputs stored?
No. All calculations run locally in your browser.