Calories to Joules Converter
Convert food energy calories to joules.
Result
0
Joules
1 Calories = 4.184 Joules
How to convert Calories to Joules?
How many Joules are in Calories? The relationship is:
- 1 cal = 4.184 J
- 1 J = 0.239006 cal
To convert Calories to Joules, multiply the value by 4.184.
Formula: Joules = Calories × 4.184
Step-by-Step Calculation
- Take the number of Calories you want to convert (e.g., 250).
- Multiply that value by 4.184.
- The result is the value in Joules. (Example: 250 × 4.184 = 1046 Joules).
How to use this converter?
Enter calories (cal) and get joules (J) instantly—useful for physics, chemistry, and energy unit comparisons (food Calories are often kcal).
Common Calories to Joules Conversions
Quick reference guide for popular calorie values.
1 cal = 4.184 J
10 cal = 41.84 J
50 cal = 209.2 J
100 cal = 418.4 J
250 cal = 1046 J
500 cal = 2092 J
1000 cal = 4184 J
2000 cal = 8368 J
5000 cal = 20920 J
10000 cal = 41840 J
History: Calories vs joules
The joule (J) is the SI unit of energy. The calorie (cal) is still used in some contexts, especially nutrition and older scientific references. Food “Calories” often refer to kilocalories (kcal).
Common Calories to Joules Conversions
| Calories Input | Joules Result |
|---|---|
| 1 cal | 4.184 J |
| 10 cal | 41.84 J |
| 50 cal | 209.2 J |
| 100 cal | 418.4 J |
| 250 cal | 1046 J |
| 500 cal | 2092 J |
| 1000 cal | 4184 J |
| 2000 cal | 8368 J |
| 5000 cal | 20920 J |
| 10000 cal | 41840 J |
Frequently Asked Questions
How do I convert calories to joules?
Multiply calories by 4.184 to get joules.
How many joules is 100 calories?
100 calories equals 418.4 joules.
How many joules is 1000 calories?
1000 calories equals 4184 joules.
How do I convert joules back to calories?
Divide joules by 4.184 (or multiply by 0.239006) to get calories.
Are “Calories” on food labels the same as calories (cal)?
Usually no—food labels use kilocalories (kcal), where 1 kcal = 1000 cal.