Quick Answer
1 kilocalorie equals 4,184 joules. To convert kilocalories to joules, multiply the value by this factor.
Key Facts
- Reverse: 1 joule = 0.000239006 kilocalories.
Kilocalories to Joules Converter
Free instant kcal → J converter. No signup, no uploads — everything is calculated privately in your browser.
1 kcal = 4,184 joules
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Kilocalories to Joules Formula
Formula: value × 4,184
Prefer to skip the math? Type any value in the converter above and it converts instantly.
Kilocalories to Joules Conversion Table
| Kilocalories (kcal) | Joules (J) |
|---|---|
| 1 kcal | 4,184 J |
| 2 kcal | 8,368 J |
| 5 kcal | 20,920 J |
| 10 kcal | 41,840 J |
| 25 kcal | 104,600 J |
| 50 kcal | 209,200 J |
| 100 kcal | 418,400 J |
| 250 kcal | 1,046,000 J |
| 500 kcal | 2,092,000 J |
| 1,000 kcal | 4,184,000 J |
Frequently Asked Questions
How do I convert kilocalories to joules?
Enter the value above and the result appears instantly — the calculation runs entirely in your browser. Formula: value × 4,184.
What is the exact kilocalories to joules conversion factor?
1 kilocalorie = 4,184 joules (shown to 6 significant figures — the converter itself computes at full precision). The reverse factor is 1 joule = 0.000239006 kilocalories.
What are some common kilocalories to joules conversions?
1 kcal = 4,184 J; 10 kcal = 41,840 J; 100 kcal = 418,400 J. Use the full conversion table below for more reference values.
Is a calorie the same as a food Calorie?
No — and the capital letter matters. A food Calorie (with a capital C) is a kilocalorie: 1,000 small calories. This converter treats them correctly: 1 kcal = 4.184 kJ = 1,000 cal. Energy labels on food almost always mean kilocalories, even where the label just says "calories".
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