A decajoule (daJ) is a metric-prefixed unit of energy equal to 101 joules, using the SI deca prefix.
Decajoules to Watt hours
Convert Decajoule (daJ) to Watt-hour (Wh) instantly with an exact formula, conversion table, and FAQ.
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Convert decajoules (daJ) 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 = daJ × 0.002777777778
Results update instantly for Decajoules to Watt hours conversions.
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Formula
Wh = daJ × 0.002777777778
daJ = Wh × 360
Conversion table
| 1 daJ | 0.002778 Wh |
| 5 daJ | 0.013889 Wh |
| 10 daJ | 0.027778 Wh |
| 20 daJ | 0.055556 Wh |
| 50 daJ | 0.138889 Wh |
| 100 daJ | 0.277778 Wh |
| 500 daJ | 1.388889 Wh |
| 1000 daJ | 2.777778 Wh |
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How the formula works
Both decajoule and watt-hour measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in decajoules by 0.002777777778 to get watt hours. To reverse the conversion, multiply a watt-hour value by 360 to get back to decajoules.
Frequently asked questions
What is Decajoule (daJ)?
A decajoule (daJ) is a metric-prefixed unit of energy equal to 101 joules, using the SI deca 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 decajoules to watt hours?
Multiply the decajoule value by 0.002777777778 to get the equivalent in watt hours. For example, 5 daJ × 0.002777777778 = 0.013889 Wh.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.002777777778 is an exact, non-rounded value.
Can I convert watt hours back to decajoules?
Yes. Divide the watt-hour value by 0.002777777778, or multiply it by 360, to get decajoules.
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About converting decajoules to watt hours
A decajoule (daJ) is a metric-prefixed unit of energy equal to 101 joules, using the SI deca 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 decajoules 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.