Calorie to Joule Converter
Convert calorie to joule instantly.
Standard energy units
joule 418.4
kilojoule 0.4184
kilocalorie 0.1
watt-hour 0.1162
kilowatt-hour 0.0001
BTU 0.3966
Fun comparisons
apples eaten 🍎~ Less than 0.01
hours of 100W bulb 💡~ Less than 0.01
marathons run 🏃~ Less than 0.01
full car tanks of fuel ⛽~ Less than 0.01
How to convert calorie to joule
Enter your energy value in calorie and see the result in joule instantly. Key reference points: 1 food Calorie equals 1 kcal (4.184 kJ), and 1 kilowatt-hour equals 3600 kJ (860 kcal).
Calorie (small calorie) is the heat unit used in chemistry and physics experiments; joule is the SI unit that has largely replaced it in science. One calorie equals exactly 4.184 joules.
Need the opposite direction? Convert joule to calorie just as easily, or explore all our energy conversions.
Common calorie to joule conversions
| Calorie (cal) | Joule (J) |
|---|---|
| 1 | 4.184 |
| 5 | 20.92 |
| 10 | 41.84 |
| 25 | 104.6 |
| 50 | 209.2 |
| 100 | 418.4 |
| 500 | 2092 |
| 1000 | 4184 |
Frequently asked questions
1 calorie equals 4.184 joule.
Multiply by 4.184. For example, 5 cal = 20.92 J.
100 calories equals 418.4 joules.
1 joule equals 0.239006 calorie.
100 calorie equals 418.4 joule.