Joules to Calories
One joule equals 0.239006 calories.
Calories = joules ÷ 4.184
By Piero Nanni · Last checked
Joules to Calories Calculator
Common Conversions
How to Convert Joules to Calories
Formula:
Calories = joules ÷ 4.184
Worked example:
1000 joules ÷ 4.184 = 239.0057 calories
Joules to Calories Conversion Table
| J | cal |
|---|---|
| 1 | 0.239 |
| 2 | 0.478 |
| 2.5 | 0.5975 |
| 5 | 1.195 |
| 7.5 | 1.7925 |
| 10 | 2.3901 |
| 20 | 4.7801 |
| 25 | 5.9751 |
| 50 | 11.9503 |
| 75 | 17.9254 |
| 100 | 23.9006 |
| 200 | 47.8011 |
| 250 | 59.7514 |
| 500 | 119.5029 |
| 750 | 179.2543 |
| 1000 | 239.0057 |
| 2000 | 478.0115 |
| 2500 | 597.5143 |
| 4184 | 1000 |
| 5000 | 1195.0287 |
| 7500 | 1792.543 |
| 10000 | 2390.0574 |
| 20000 | 4780.1147 |
| 25000 | 5975.1434 |
| 50000 | 11950.2868 |
| 75000 | 17925.4302 |
| 100000 | 23900.5736 |
About This Conversion
Joules to calories divides by 4.184. It is the conversion used to read a scientific or engineering energy figure in the units nutrition labels and older heating specifications use.
Outside the United States, food labels usually give kilojoules first: a 1,000 kJ portion is 239 kcal. Dividing kilojoules by 4.184 gives kilocalories directly, which is the same arithmetic one step up.
The calorie used here is the thermochemical calorie, defined as exactly 4.184 J. Engineering tables sometimes use the International Table calorie of 4.1868 J instead, a 0.07 percent difference that only matters in precise work. The food Calorie, with a capital C, is a kilocalorie: 4,184 J.
Frequently Asked Questions
How many calories is one joule?
One joule is about 0.239 calories.
How many calories is 1000 joules?
1,000 joules is about 239 small calories, or 0.239 food Calories.
How do I convert kilojoules to Calories?
Divide kilojoules by 4.184. A 1,000 kJ portion is 239 kcal.
How many joules is one food Calorie?
One food Calorie is 4,184 joules, or 4.184 kilojoules.
Sources
Worth Knowing
Related Conversions
Converting the other way? Calories to Joules
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