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This article was co-authored by Jesse Pichardo and by wikiHow staff writer, Sophia Bell. Jesse Pichardo is a Personal Trainer and Nutrition expert based in Fresno, California. He is a Certified Personal Trainer with the National Academy of Sports Medicine. He is also a Certified Nutrition Coach through Precision Nutrition’s Level 2 Master Health Coaching Certification. He is also a Personal Trainer on staff at Fresno Athletic Training Center, a stat-of-the-art training center for personal training, bootcamps, sports-specific coaching, and athletic event training. Jesse helps clients with motivation and accountability, providing a structured and personalized fitness program for each person. No matter where a customer is in their fitness journey, Jesse prioritizes moving them up to the next level and helping them achieve their goals.
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Both kiloJoules (kJ) and calories (cal) are units that measure energy, usually in the context of nutrition. Luckily, it’s easy to convert between them so you can figure out exactly how much nutritional energy various foods contain.
Steps
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![Step 1 Start with the number of kilojoules (kJ).]()
Start with the number of kilojoules (kJ). Nutritional energy is often measured in kilojoules, but you can convert kJ to calories (cal) in a few simple steps.[1]- For instance, let’s say you want to convert 5 kJ.
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![Step 2 Multiply the kilocalories (kJ) by 1,000 to get the number of joules (J).]()
Multiply the kilocalories (kJ) by 1,000 to get the number of joules (J). Note that 1 kilojoule is equal to 1,000 joules. So, to convert from kilojoules to joules, multiply the number by 1,000.[2]- For example, multiply 5 kJ by 1,000 to equal 5,000 J.
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![Step 3 Multiply the number of joules (J) by 0.239 to get the number of calories (cal).]()
Multiply the number of joules (J) by 0.239 to get the number of calories (cal). Note that 1 kJ = 0.239 calories. So, to convert from joules to calories, all you have to do is multiply by 0.239.[3]- For example, multiply 5,000 J by 0.239 to get 1,195 cal. Therefore, 5 kJ = 1,195 calories.
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![Step 4 Convert the calories (cal) into kilocalories (kcal) if desired.]()
Convert the calories (cal) into kilocalories (kcal) if desired. Simply divide the number of calories by 1,000 to get the number of kilocalories.[4]- For example, divide 1,195 cal by 1,000 to get 1.195 kilocalories. Therefore, 5kJ = 1.195 kcal.
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![Step 1 Divide the number of calories (cal) by 1,000 to find the number of kilocalories (kcal).]()
Divide the number of calories (cal) by 1,000 to find the number of kilocalories (kcal). If you haven’t already, convert the number of calories to kilocalories.[5]- For instance, if you have 25 calories, divide this number by 1,000 to get 0.025 kcal.
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![Step 2 Multiply the kilocalories (kcal) by 4.185 to find the number of kilojoules (kJ).]()
Multiply the kilocalories (kcal) by 4.185 to find the number of kilojoules (kJ). Note that 1 kcal = 4.184 kJ. So, to convert from kilocalories to kilojoules, multiply by 4.185.[6]- For example, multiply 0.025 kcal by 4.184 to get 0.105 kJ. So, 25 calories is equal to 0.105 kilojoules.
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![Step 3 Convert the kilojoules (kJ) to joules (J) if desired.]()
Convert the kilojoules (kJ) to joules (J) if desired. If you need to know the number of joules, rather than kilojoules, simply multiply by 1,000.[7]- For example, multiply 0.105 kJ by 1,000 to get 105 joules. Therefore, 25 cal = 105 J.
Expert Q&A
Tips
References
- ↑ https://sciencing.com/how-5135082-convert-kilojoules-kilocalories.html
- ↑ https://sciencing.com/how-5135082-convert-kilojoules-kilocalories.html
- ↑ https://sciencing.com/how-5135082-convert-kilojoules-kilocalories.html
- ↑ https://sciencing.com/how-5135082-convert-kilojoules-kilocalories.html
- ↑ http://www.fao.org/docrep/006/Y5022E/y5022e04.htm
- ↑ http://www.fao.org/docrep/006/Y5022E/y5022e04.htm
- ↑ http://www.fao.org/docrep/006/Y5022E/y5022e04.htm
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