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 Watt hours
Convert Nanojoule (nJ) to Watt-hour (Wh) instantly with an exact formula, conversion table, and FAQ.
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Convert nanojoules (nJ) to watt hours (Wh) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
Wh = nJ × 2.777777778e-13
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Formula
Wh = nJ × 2.777777778e-13
nJ = Wh × 3600000000000
Conversion table
| 1 nJ | 2.777778e-13 Wh |
| 5 nJ | 1.388889e-12 Wh |
| 10 nJ | 2.777778e-12 Wh |
| 20 nJ | 5.555556e-12 Wh |
| 50 nJ | 1.388889e-11 Wh |
| 100 nJ | 2.777778e-11 Wh |
| 500 nJ | 1.388889e-10 Wh |
| 1000 nJ | 2.777778e-10 Wh |
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How the formula works
Both nanojoule and watt-hour measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in nanojoules by 2.777777778e-13 to get watt hours. To reverse the conversion, multiply a watt-hour value by 3600000000000 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 Watt-hour (Wh)?
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
How do I convert nanojoules to watt hours?
Multiply the nanojoule value by 2.777777778e-13 to get the equivalent in watt hours. For example, 5 nJ × 2.777777778e-13 = 1.388889e-12 Wh.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 2.777777778e-13 is an exact, non-rounded value.
Can I convert watt hours back to nanojoules?
Yes. Divide the watt-hour value by 2.777777778e-13, or multiply it by 3600000000000, to get nanojoules.
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About converting nanojoules to watt hours
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 watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
Use this calculator to move between nanojoules and watt hours accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.