A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix.
Exajoules to Calories
Convert Exajoule (EJ) to Calorie (cal) instantly with an exact formula, conversion table, and FAQ.
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Convert exajoules (EJ) to calories (cal) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C.
cal = EJ × 2.390057361e+17
Results update instantly for Exajoules to Calories conversions.
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Formula
cal = EJ × 2.390057361e+17
EJ = cal × 4.184000000e-18
Conversion table
| 1 EJ | 2.390057e+17 cal |
| 5 EJ | 1.195029e+18 cal |
| 10 EJ | 2.390057e+18 cal |
| 20 EJ | 4.780115e+18 cal |
| 50 EJ | 1.195029e+19 cal |
| 100 EJ | 2.390057e+19 cal |
| 500 EJ | 1.195029e+20 cal |
| 1000 EJ | 2.390057e+20 cal |
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How the formula works
Both exajoule and calorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in exajoules by 2.390057361e+17 to get calories. To reverse the conversion, multiply a calorie value by 4.184000000e-18 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 Calorie (cal)?
A (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C.
How do I convert exajoules to calories?
Multiply the exajoule value by 2.390057361e+17 to get the equivalent in calories. For example, 5 EJ × 2.390057361e+17 = 1.195029e+18 cal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 2.390057361e+17 is an exact, non-rounded value.
Can I convert calories back to exajoules?
Yes. Divide the calorie value by 2.390057361e+17, or multiply it by 4.184000000e-18, to get exajoules.
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About converting exajoules to calories
A exajoule (EJ) is a metric-prefixed unit of energy equal to 1018 joules, using the SI exa prefix. A (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C.
Use this calculator to move between exajoules and calories accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.