Calories to Joules Converter
Convert energy from calories (cal) to joules (J). Includes rounding controls, quick references, and input validation.
Enter calories and convert. Press Ctrl/Cmd + Enter.
Result will appear here.
| Reference | cal | J |
|---|
Privacy: runs locally in your browser. No inputs are stored or transmitted.
How it works
J = cal × 4.184
Reverse: cal = J ÷ 4.184
Examples
- 1 cal = 4.184 J
- 100 cal = 418.4 J
- 250 cal = 1046 J
FAQ
- 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.