Calories to Joules (cal to J)
Free online calorie to joule converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.
ENERGY CONVERTER — INSTANT RESULT
Formula: multiply the calorie value by 4.184 — i.e. J = cal × 4.184
Quick check: 1 cal = 4.184 J
Quick check: 1 cal = 4.184 J
Calories to Joules conversion table
| Calories (cal) | Joules (J) |
|---|---|
| 1 cal | 4.184 J |
| 2 cal | 8.368 J |
| 3 cal | 12.552 J |
| 4 cal | 16.736 J |
| 5 cal | 20.92 J |
| 6 cal | 25.104 J |
| 7 cal | 29.288 J |
| 8 cal | 33.472 J |
| 9 cal | 37.656 J |
| 10 cal | 41.84 J |
| 15 cal | 62.76 J |
| 20 cal | 83.68 J |
| 25 cal | 104.6 J |
| 30 cal | 125.52 J |
| 40 cal | 167.36 J |
| 50 cal | 209.2 J |
| 75 cal | 313.8 J |
| 100 cal | 418.4 J |
| 250 cal | 1,046 J |
| 500 cal | 2,092 J |
| 1,000 cal | 4,184 J |
How to convert calories to joules
To convert calories to joules, multiply the amount in calories by 4.184. For example, 10 cal = 41.84 J. To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.
Convert between joules, calories, BTU, kilowatt-hours and foot-pounds. The joule is the SI unit of energy; the thermochemical calorie is defined as exactly 4.184 J.
Frequently asked questions
How many joules are in one calorie?
One calorie is exactly 4.184 joules.
How do I convert cal to J?
Multiply the cal value by 4.184 to get J. The converter at the top of this page does this automatically and works in both directions.
How much is 100 calories in joules?
100 calories equals 418.4 joules.