How to convert calories to kilojoules
Multiply the value in calories by 0.004184 (or divide by 239.0057361) to get kilojoules.
1 cal = 0.004184 kJ
Example
To convert 10 calories to kilojoules: 10 × 0.004184 = 0.04184 kJ.
cal to kJ conversion chart
| Calories (cal) | Kilojoules (kJ) |
|---|---|
| 0.1 cal | 0.0004184 kJ |
| 0.25 cal | 0.001046 kJ |
| 0.5 cal | 0.002092 kJ |
| 1 cal | 0.004184 kJ |
| 2 cal | 0.008368 kJ |
| 3 cal | 0.012552 kJ |
| 4 cal | 0.016736 kJ |
| 5 cal | 0.02092 kJ |
| 6 cal | 0.025104 kJ |
| 7 cal | 0.029288 kJ |
| 8 cal | 0.033472 kJ |
| 9 cal | 0.037656 kJ |
| 10 cal | 0.04184 kJ |
| 12 cal | 0.050208 kJ |
| 15 cal | 0.06276 kJ |
| 20 cal | 0.08368 kJ |
| 25 cal | 0.1046 kJ |
| 30 cal | 0.12552 kJ |
| 40 cal | 0.16736 kJ |
| 50 cal | 0.2092 kJ |
| 75 cal | 0.3138 kJ |
| 100 cal | 0.4184 kJ |
| 250 cal | 1.046 kJ |
| 500 cal | 2.092 kJ |
| 1,000 cal | 4.184 kJ |
About the units
Calorie (small) (cal)
A (thermochemical) calorie is 4.184 joules — the energy to heat 1 g of water by 1 °C.
Kilojoule (kJ)
A kilojoule is 1,000 joules, used on food labels in Australia and Europe.
Related conversions
Kilojoules to calories · Joules to kilojoules · Calories to joules · Calories to kilocalories · Calories to kilowatt-hours · Calories to BTU · Kilocalories to kilojoules · Kilowatt-hours to kilojoules · BTU to kilojoules · All energy units