A nanojoule (nJ) is a metric-prefixed unit of energy equal to 10-9 joules, a fraction of a single joule, using the SI nano prefix.
Nanojoules to Calories
Convert Nanojoule (nJ) to Calorie (cal) instantly with an exact formula, conversion table, and FAQ.
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Convert nanojoules (nJ) 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 = nJ × 2.390057361e-10
Results update instantly for Nanojoules to Calories conversions.
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Formula
cal = nJ × 2.390057361e-10
nJ = cal × 4184000000
Conversion table
| 1 nJ | 2.390057e-10 cal |
| 5 nJ | 1.195029e-09 cal |
| 10 nJ | 2.390057e-09 cal |
| 20 nJ | 4.780115e-09 cal |
| 50 nJ | 1.195029e-08 cal |
| 100 nJ | 2.390057e-08 cal |
| 500 nJ | 1.195029e-07 cal |
| 1000 nJ | 2.390057e-07 cal |
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How the formula works
Both nanojoule and calorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in nanojoules by 2.390057361e-10 to get calories. To reverse the conversion, multiply a calorie value by 4184000000 to get back to nanojoules.
Frequently asked questions
What is Nanojoule (nJ)?
A nanojoule (nJ) is a metric-prefixed unit of energy equal to 10-9 joules, a fraction of a single joule, using the SI nano 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 nanojoules to calories?
Multiply the nanojoule value by 2.390057361e-10 to get the equivalent in calories. For example, 5 nJ × 2.390057361e-10 = 1.195029e-09 cal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 2.390057361e-10 is an exact, non-rounded value.
Can I convert calories back to nanojoules?
Yes. Divide the calorie value by 2.390057361e-10, or multiply it by 4184000000, to get nanojoules.
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About converting nanojoules to calories
A nanojoule (nJ) is a metric-prefixed unit of energy equal to 10-9 joules, a fraction of a single joule, using the SI nano 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 nanojoules 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.