Convert kilojoule (kJ) to calorie (cal).
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Calorie to Kilojoule Converter (cal to kJ)
Convert calorie (cal) to kilojoule (kJ).Unit Converter · Energy
Quick answer
1 calorie (cal) is equal to 0.004184 kilojoules (kJ). 1 kilojoule (kJ) is approximately equal to 239.0057 calories (cal).
To convert cal to kJ, multiply the value in calories by 0.004184. For example, 10 cal = 0.04184 kJ, and 100 cal = 0.4184 kJ.
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Quick reference — calorie to kilojoule
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How to convert calories to kilojoules
How many kilojoules are in a calorie? 1 calorie is 0.004184 kilojoules. This free cal to kJ converter and calorie to kilojoule calculator gives the answer instantly for any value.
To convert calorie (cal) to kilojoule (kJ), multiply the value in calories by 0.004184.
kJ = cal × 0.004184
- 1
Take the value in calories
For example, 25 cal.
- 2
Multiply by 0.004184
25 × 0.004184.
- 3
Read the answer in kilojoules
25 cal = 0.1046 kJ.
Calorie to Kilojoule conversion table
Common values from 1 to 1,000 calories converted to kilojoules.
| Calorie (cal) | Kilojoule (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 |
| 15 cal | 0.06276 kJ |
| 20 cal | 0.08368 kJ |
| 25 cal | 0.1046 kJ |
| Calorie (cal) | Kilojoule (kJ) |
|---|---|
| 30 cal | 0.12552 kJ |
| 40 cal | 0.16736 kJ |
| 50 cal | 0.2092 kJ |
| 60 cal | 0.25104 kJ |
| 70 cal | 0.29288 kJ |
| 75 cal | 0.3138 kJ |
| 80 cal | 0.33472 kJ |
| 90 cal | 0.37656 kJ |
| 100 cal | 0.4184 kJ |
| 250 cal | 1.046 kJ |
| 500 cal | 2.092 kJ |
| 1,000 cal | 4.184 kJ |
About calories and kilojoules
Calorie (cal)
A calorie (cal) here is the thermochemical calorie, exactly 4.184 joules. Food "Calories" are kilocalories, a thousand times larger.
Kilojoule (kJ)
A kilojoule (kJ) is 1,000 joules. Food energy on nutrition labels is often shown in kJ as well as kcal.
cal to kJ: common questions
- How many kilojoules are in 1 calorie?
- 1 calorie (cal) is equal to 0.004184 kilojoules (kJ). In short: 1 cal = 0.004184 kJ.
- How do I convert calories to kilojoules?
- To convert cal to kJ, multiply the value in calories by 0.004184. For example, 5 cal = 0.02092 kJ.
- How do I convert kilojoules to calories?
- Use the Kilojoule to Calorie converter, which applies the exact reverse factor.
- What is 10 cal in kJ, and what is 100 cal?
- 10 cal = 0.04184 kJ, and 100 cal = 0.4184 kJ. The table above lists more values from 1 to 1,000.
- Is this cal to kJ converter accurate?
- Yes. It uses the exact conversion factor and shows results to as many as 8 decimal places, so you can rely on it for study, work and everyday measuring.
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