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 Kilocalories
Convert Nanojoule (nJ) to Kilocalorie (kcal) instantly with an exact formula, conversion table, and FAQ.
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Convert nanojoules (nJ) 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 = nJ × 2.390057361e-13
Results update instantly for Nanojoules to Kilocalories conversions.
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Formula
kcal = nJ × 2.390057361e-13
nJ = kcal × 4184000000000
Conversion table
| 1 nJ | 2.390057e-13 kcal |
| 5 nJ | 1.195029e-12 kcal |
| 10 nJ | 2.390057e-12 kcal |
| 20 nJ | 4.780115e-12 kcal |
| 50 nJ | 1.195029e-11 kcal |
| 100 nJ | 2.390057e-11 kcal |
| 500 nJ | 1.195029e-10 kcal |
| 1000 nJ | 2.390057e-10 kcal |
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How the formula works
Both nanojoule and kilocalorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in nanojoules by 2.390057361e-13 to get kilocalories. To reverse the conversion, multiply a kilocalorie value by 4184000000000 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 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 nanojoules to kilocalories?
Multiply the nanojoule value by 2.390057361e-13 to get the equivalent in kilocalories. For example, 5 nJ × 2.390057361e-13 = 1.195029e-12 kcal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 2.390057361e-13 is an exact, non-rounded value.
Can I convert kilocalories back to nanojoules?
Yes. Divide the kilocalorie value by 2.390057361e-13, or multiply it by 4184000000000, to get nanojoules.
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About converting nanojoules to kilocalories
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 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 nanojoules 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.