Joule to Calorie
Convert J to cal instantly — free, no sign-up.
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About the Joule (J)
The Joule is the SI unit of energy, defined as the work done by one newton of force over one meter — a single joule is roughly the energy released dropping an apple one meter.
About the Calorie (cal)
The Calorie is the small (thermochemical) calorie, defined as the energy needed to raise 1 gram of water by 1°C — not the unit on food labels, which uses the much larger kilocalorie.
How to convert J to cal
- Enter the value in J in the box above.
- The cal equivalent updates instantly.
- Use the swap button to convert cal back to J just as easily.