Convert calories to joules and joules to calories instantly. Bidirectional energy converter with formula and common values.
Multiply the calorie value by 4.184 to get joules. The thermochemical calorie was originally defined as the energy needed to raise 1 gram of water by 1 degree Celsius. The modern definition ties it to the joule: 1 cal = 4.184 J exactly.
| Calories | Joules |
|---|---|
| 25 | 104.6 |
| 100 | 418.4 |
| 250 | 1,046.0 |
| 500 | 2,092.0 |
| 1,000 | 4,184.0 |
| 5,000 | 20,920.0 |
| 15,000 | 62,760.0 |
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One thermochemical calorie equals exactly 4.184 joules. This is the internationally accepted definition since 1956.
No. Food labels use kilocalories (kcal), also written as Calories with a capital C. One food Calorie equals 1,000 thermochemical calories, or 4,184 joules.
Joules are standard in physics, engineering, and most scientific work. Calories are still widely used in nutrition, chemistry, and some biological sciences.
Multiply 350 by 4.184. So 350 cal = 1,464.4 J.