The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
Joules to Decajoules
Convert Joule (J) to Decajoule (daJ) instantly with an exact formula, conversion table, and FAQ.
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Convert joules (J) to decajoules (daJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A decajoule (daJ) is a metric-prefixed unit of energy equal to 101 joules, using the SI deca prefix.
daJ = J × 0.1
Results update instantly for Joules to Decajoules conversions.
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Formula
daJ = J × 0.1
J = daJ × 10
Conversion table
| 1 J | 0.100000 daJ |
| 5 J | 0.500000 daJ |
| 10 J | 1 daJ |
| 20 J | 2 daJ |
| 50 J | 5 daJ |
| 100 J | 10 daJ |
| 500 J | 50 daJ |
| 1000 J | 100 daJ |
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How the formula works
Both joule and decajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in joules by 0.1 to get decajoules. To reverse the conversion, multiply a decajoule value by 10 to get back to joules.
Frequently asked questions
What is Joule (J)?
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
What is Decajoule (daJ)?
A decajoule (daJ) is a metric-prefixed unit of energy equal to 101 joules, using the SI deca prefix.
How do I convert joules to decajoules?
Multiply the joule value by 0.1 to get the equivalent in decajoules. For example, 5 J × 0.1 = 0.500000 daJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.1 is an exact, non-rounded value.
Can I convert decajoules back to joules?
Yes. Divide the decajoule value by 0.1, or multiply it by 10, to get joules.
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About converting joules to decajoules
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter. A decajoule (daJ) is a metric-prefixed unit of energy equal to 101 joules, using the SI deca prefix.
Use this calculator to move between joules and decajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.