Convert Kilocalories to Joules
Kilocalories to Joules conversion table
| Kilocalories (kcal) | Joules (J) |
|---|---|
| 1 kcal | 4184 J |
| 2 kcal | 8368 J |
| 5 kcal | 20920 J |
| 10 kcal | 41840 J |
| 25 kcal | 104600 J |
| 50 kcal | 209200 J |
| 100 kcal | 418400 J |
| 200 kcal | 836800 J |
| 500 kcal | 2092000 J |
| 1000 kcal | 4184000 J |
How to convert kilocalories to joules
Whether you need to express a value in J instead of kcal, this guide walks you through the exact steps. Energy conversions connect food nutrition labels (calories), electricity bills (kWh), and scientific measurements in joules or BTU.
Formula: Multiply the kilocalories value by 4184. In equation form: J = kcal × 4184.
One kilocalories equals approximately 4184 J. This means you can multiply any kcal value by 4184 to get the equivalent in J.
For instance, converting 10 kcal gives 41840 J. Try different values using the quick-value chips or type directly into the input field.
Common mistake: Food calories on nutrition labels are actually kilocalories (kcal), which confuses many people when comparing to joules or watt-hours.
Bookmark this page for quick kcal to J conversions, or use the swap button to reverse the direction and convert J back to kcal.
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Frequently asked questions
1 kcal equals 4184 J.
Multiply the kilocalories value by 4184.
10 kcal = 41840 J.