Joule to Kilocalorie Converter
Convert joule to kilocalorie instantly.
Standard energy units
kilojoule 0.1
calorie 23.901
kilocalorie 0.0239
watt-hour 0.0278
kilowatt-hour 0
BTU 0.0948
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 joule to kilocalorie
Enter your energy value in joule and see the result in kilocalorie instantly. Key reference points: 1 food Calorie equals 1 kcal (4.184 kJ), and 1 kilowatt-hour equals 3600 kJ (860 kcal).
Joule is the SI energy unit; kilocalorie (kcal) is the food Calorie used on nutrition labels. One kilocalorie equals 4184 joules.
Need the opposite direction? Convert kilocalorie to joule just as easily, or explore all our energy conversions.
Common joule to kilocalorie conversions
| Joule (J) | Kilocalorie (kcal) |
|---|---|
| 1 | 0.000239006 |
| 5 | 0.00119503 |
| 10 | 0.00239006 |
| 25 | 0.00597514 |
| 50 | 0.0119503 |
| 100 | 0.0239006 |
| 500 | 0.119503 |
| 1000 | 0.239006 |
Frequently asked questions
1 joule equals 0.000239006 kilocalorie.
Multiply by 0.000239006. For example, 5 J = 0.00119503 kcal.
4184 joules equals exactly 1 kilocalorie (1 food Calorie).
1 kilocalorie equals 4184 joule.
100 joule equals 0.0239006 kilocalorie.