Calorie to Joule
Convert cal to J instantly — free, no sign-up.
—
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.
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.
How to convert cal to J
- Enter the value in cal in the box above.
- The J equivalent updates instantly.
- Use the swap button to convert J back to cal just as easily.