Convert kilocalories to joules
1 kcal = 4184 J — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
4184J
1 kcal = 4184 J
How to convert kilocalories to joules
Multiply the number of kilocalories by 4184 to get joules.
The exact factor is 4184 .
Kilocalorie: The Calorie on food labels — 1000 small calories.
Kilocalorie to Joule conversion table
| Kilocalories (kcal) | Joules (J) |
|---|---|
| 1 kcal | 4184 |
| 2 kcal | 8368 |
| 3 kcal | 12 552 |
| 5 kcal | 20 920 |
| 10 kcal | 41 840 |
| 20 kcal | 83 680 |
| 25 kcal | 104 600 |
| 50 kcal | 209 200 |
| 100 kcal | 418 400 |
| 250 kcal | 1 046 000 |
| 500 kcal | 2 092 000 |
| 1000 kcal | 4 184 000 |
Joule to Kilocalorie conversion table
| Joules (J) | Kilocalories (kcal) |
|---|---|
| 1 J | 0.000 239 005 74 |
| 2 J | 0.000 478 011 47 |
| 3 J | 0.000 717 017 21 |
| 5 J | 0.001 195 028 7 |
| 10 J | 0.002 390 057 4 |
| 20 J | 0.004 780 114 7 |
| 25 J | 0.005 975 143 4 |
| 50 J | 0.011 950 287 |
| 100 J | 0.023 900 574 |
| 250 J | 0.059 751 434 |
| 500 J | 0.119 502 87 |
| 1000 J | 0.239 005 74 |
Frequently asked
How many joules are in a kilocalorie?
One kilocalorie equals 4184 joules (kcal → J). That figure is exact, not rounded.
How do you convert kilocalories to joules?
Multiply the number of kilocalories by 4184 to get joules.
What is 1 J in kilocalories?
One joule is 0.0002390057361 kilocalories.
What is 10 kcal in J?
10 kcal = 41 840 J.
What exactly is a kilocalorie?
The Calorie on food labels — 1000 small calories.