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 Decijoules
Convert Joule (J) to Decijoule (dJ) instantly with an exact formula, conversion table, and FAQ.
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Convert joules (J) to decijoules (dJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A decijoule (dJ) is a metric-prefixed unit of energy equal to 10-1 joules, a fraction of a single joule, using the SI deci prefix.
dJ = J × 10
Results update instantly for Joules to Decijoules conversions.
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Formula
dJ = J × 10
J = dJ × 0.1
Conversion table
| 1 J | 10 dJ |
| 5 J | 50 dJ |
| 10 J | 100 dJ |
| 20 J | 200 dJ |
| 50 J | 500 dJ |
| 100 J | 1000 dJ |
| 500 J | 5000 dJ |
| 1000 J | 10000 dJ |
Related conversions
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How the formula works
Both joule and decijoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in joules by 10 to get decijoules. To reverse the conversion, multiply a decijoule value by 0.1 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 Decijoule (dJ)?
A decijoule (dJ) is a metric-prefixed unit of energy equal to 10-1 joules, a fraction of a single joule, using the SI deci prefix.
How do I convert joules to decijoules?
Multiply the joule value by 10 to get the equivalent in decijoules. For example, 5 J × 10 = 50 dJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 10 is an exact, non-rounded value.
Can I convert decijoules back to joules?
Yes. Divide the decijoule value by 10, or multiply it by 0.1, to get joules.
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About converting joules to decijoules
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 decijoule (dJ) is a metric-prefixed unit of energy equal to 10-1 joules, a fraction of a single joule, using the SI deci prefix.
Use this calculator to move between joules and decijoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.