Calories to Kilojoules
Convert cal to kJ. 1 calorie = 0.004184 kJ, and 1 kilojoule = 239.005736138 cal.
Formula Multiply the value in calories by 0.004184. Calories to Kilojoules table
1 calorie in every unit
| Joules | 4.184 | J |
|---|---|---|
| Kilojoules | 0.004184 | kJ |
| Megajoules | 0.000004184 | MJ |
| Kilocalories | 0.001 | kcal |
| Watt-hours | 0.001162222222 | Wh |
| Kilowatt-hours | 0.000001162222 | kWh |
| British thermal units | 0.003965666831 | BTU |
| Foot-pounds | 3.08596003258 | ft·lbf |
| Electronvolts | 2.611447e+19 | eV |
Food labels write kilocalories (kcal) as "Calories". Calories here are thermochemical: 1 cal = 4.184 J.
How to convert calories to kilojoules
Multiply the value in calories by 0.004184.
For example, 10 cal = 0.04184 kJ, and 10 kJ = 2,390.05736138 cal.
Frequently asked questions
How many kilojoules are in one calorie?
1 calorie = 0.004184 kJ.
What is 10 cal in kJ?
10 cal = 0.04184 kJ.
How do I convert kJ back to cal?
Multiply the value in kilojoules by 239.005736138. 1 kilojoule = 239.005736138 cal.
Calories to Kilojoules table
| Calories (cal) | Kilojoules (kJ) |
|---|---|
| 0.1 | 0.0004184 |
| 0.5 | 0.002092 |
| 1 | 0.004184 |
| 2 | 0.008368 |
| 3 | 0.012552 |
| 4 | 0.016736 |
| 5 | 0.02092 |
| 6 | 0.025104 |
| 7 | 0.029288 |
| 8 | 0.033472 |
| 9 | 0.037656 |
| 10 | 0.04184 |
| 15 | 0.06276 |
| 20 | 0.08368 |
| 25 | 0.1046 |
| 30 | 0.12552 |
| 50 | 0.2092 |
| 75 | 0.3138 |
| 100 | 0.4184 |
| 250 | 1.046 |
| 500 | 2.092 |
| 1,000 | 4.184 |
Related conversions
Every tool runs in your browser. Nothing you type or upload is sent to a server.