Quick Answer
1 joule equals 0.239006 calories. To convert joules to calories, multiply the value by this factor.
Key Facts
- Reverse: 1 calorie = 4.184 joules.
Joules to Calories Converter
Free instant J → cal converter. No signup, no uploads — everything is calculated privately in your browser.
1 J = 0.239006 calories
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Joules to Calories Formula
Formula: value ÷ 4.184
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Joules to Calories Conversion Table
| Joules (J) | Calories (cal) |
|---|---|
| 1 J | 0.239006 cal |
| 2 J | 0.478011 cal |
| 5 J | 1.19503 cal |
| 10 J | 2.39006 cal |
| 25 J | 5.97514 cal |
| 50 J | 11.9503 cal |
| 100 J | 23.9006 cal |
| 250 J | 59.7514 cal |
| 500 J | 119.503 cal |
| 1,000 J | 239.006 cal |
Frequently Asked Questions
How do I convert joules to calories?
Enter the value above and the result appears instantly — the calculation runs entirely in your browser. Formula: value ÷ 4.184.
What is the exact joules to calories conversion factor?
1 joule = 0.239006 calories (shown to 6 significant figures — the converter itself computes at full precision). The reverse factor is 1 calorie = 4.184 joules.
What are some common joules to calories conversions?
1 J = 0.239006 cal; 10 J = 2.39006 cal; 100 J = 23.9006 cal. 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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