Quick Answer:
1 joule = 0.239006 calories. To convert joules to calories, multiply the joule value by 0.239006.
Joules and calories measure energy in physics, nutrition, and chemistry.
Detailed Overview: Joules to Calories
A joule is the SI unit of energy. A calorie (small calorie) is the energy to raise 1 gram of water by 1°C. 1 calorie = 4.184 joules. 1 joule = 0.239006 calories. A kilocalorie (food Calorie) is 1,000 small calories. Multiply joules by 0.239006 for calories. Multiply calories by 4.184 for joules.
Conversion Reference Table
1 J = 0.2390 cal, 10 J = 2.3901 cal, 100 J = 23.9006 cal, 500 J = 119.5029 cal, 1000 J = 239.0057 cal, 4184 J = 1 kcal
Practical Calculation Example
Convert 2,000 joules: calories = 2,000 × 0.239006 = 478.01 cal. Food Calories: 2,000 / 4,184 = 0.478 kcal
Key Takeaways
1 joule = 0.239006 calories. 1 calorie = 4.184 joules. 1 food Calorie (kcal) = 4,184 joules.
THE AUTORANK Editorial Note: Nutrition labels use kcal (food Calories), so always multiply by 4,184 for dietary calculations.
Frequently Asked Questions
Q: What is the difference between calorie and Calorie?
A: A small calorie (cal) is 4.184 joules, while a food Calorie (kcal) is 1,000 small calories.
A: A small calorie (cal) is 4.184 joules, while a food Calorie (kcal) is 1,000 small calories.
Q: How many joules are in a food Calorie?
A: One food Calorie (kcal) equals 4,184 joules.
A: One food Calorie (kcal) equals 4,184 joules.
The joule-to-calorie factor of 0.239006 is essential for energy and nutrition calculations.
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