A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
Exajoules to Kilocalories
Convert Exajoule (EJ) to Kilocalorie (kcal) instantly with an exact formula, conversion table, and FAQ.
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Convert exajoules (EJ) to kilocalories (kcal) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
kcal = EJ × 239005736137667
Results update instantly for Exajoules to Kilocalories conversions.
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Formula
kcal = EJ × 239005736137667
EJ = kcal × 4.184000000e-15
Conversion table
| 1 EJ | 2.390057e+14 kcal |
| 5 EJ | 1.195029e+15 kcal |
| 10 EJ | 2.390057e+15 kcal |
| 20 EJ | 4.780115e+15 kcal |
| 50 EJ | 1.195029e+16 kcal |
| 100 EJ | 2.390057e+16 kcal |
| 500 EJ | 1.195029e+17 kcal |
| 1000 EJ | 2.390057e+17 kcal |
Related conversions
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How the formula works
Both exajoule and kilocalorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in exajoules by 239005736137667 to get kilocalories. To reverse the conversion, multiply a kilocalorie value by 4.184000000e-15 to get back to exajoules.
Frequently asked questions
What is Exajoule (EJ)?
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
What is Kilocalorie (kcal)?
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
How do I convert exajoules to kilocalories?
Multiply the exajoule value by 239005736137667 to get the equivalent in kilocalories. For example, 5 EJ × 239005736137667 = 1.195029e+15 kcal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 239005736137667 is an exact, non-rounded value.
Can I convert kilocalories back to exajoules?
Yes. Divide the kilocalorie value by 239005736137667, or multiply it by 4.184000000e-15, to get exajoules.
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About converting exajoules to kilocalories
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix. A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
Use this calculator to move between exajoules and kilocalories accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.