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Energy
Calories to Kilojoules
Convert calories (cal) to kilojoules (kJ). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 cal = 0.004184 kJ
Calories to Kilojoules Conversion Table
Common values, ready to copy:
| calories | kilojoules |
|---|---|
| 1 cal | 0.004184 kJ |
| 2 cal | 0.008368 kJ |
| 5 cal | 0.02092 kJ |
| 10 cal | 0.04184 kJ |
| 25 cal | 0.1046 kJ |
| 50 cal | 0.2092 kJ |
| 100 cal | 0.4184 kJ |
| 1,000 cal | 4.184 kJ |
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Formula
kilojoules = calories × 0.004184
Energy uses the SI joule. Food calories (kcal) are 1,000 small calories: 1 kcal = 4,184 J. 1 kWh = 3.6 MJ = 3,600,000 J. 1 BTU = 1,055.06 J.
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