A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
Watt hours to Microjoules
Convert Watt-hour (Wh) to Microjoule (uJ) instantly with an exact formula, conversion table, and FAQ.
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Convert watt hours (Wh) to microjoules (uJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A microjoule (uJ) is a metric-prefixed unit of energy equal to 10-6 joules, a fraction of a single joule, using the SI micro prefix.
uJ = Wh × 3600000000
Results update instantly for Watt hours to Microjoules conversions.
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Formula
uJ = Wh × 3600000000
Wh = uJ × 2.777777778e-10
Conversion table
| 1 Wh | 3.600000e+09 uJ |
| 5 Wh | 1.800000e+10 uJ |
| 10 Wh | 3.600000e+10 uJ |
| 20 Wh | 7.200000e+10 uJ |
| 50 Wh | 1.800000e+11 uJ |
| 100 Wh | 3.600000e+11 uJ |
| 500 Wh | 1.800000e+12 uJ |
| 1000 Wh | 3.600000e+12 uJ |
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How the formula works
Both watt-hour and microjoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in watt hours by 3600000000 to get microjoules. To reverse the conversion, multiply a microjoule value by 2.777777778e-10 to get back to watt hours.
Frequently asked questions
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.
What is Microjoule (uJ)?
A microjoule (uJ) is a metric-prefixed unit of energy equal to 10-6 joules, a fraction of a single joule, using the SI micro prefix.
How do I convert watt hours to microjoules?
Multiply the watt-hour value by 3600000000 to get the equivalent in microjoules. For example, 5 Wh × 3600000000 = 1.800000e+10 uJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 3600000000 is an exact, non-rounded value.
Can I convert microjoules back to watt hours?
Yes. Divide the microjoule value by 3600000000, or multiply it by 2.777777778e-10, to get watt hours.
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About converting watt hours to microjoules
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules. A microjoule (uJ) is a metric-prefixed unit of energy equal to 10-6 joules, a fraction of a single joule, using the SI micro prefix.
Use this calculator to move between watt hours and microjoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.