A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Gigajoules to Decijoules
Convert Gigajoule (GJ) to Decijoule (dJ) instantly with an exact formula, conversion table, and FAQ.
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Convert gigajoules (GJ) 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 = GJ × 10000000000
Results update instantly for Gigajoules to Decijoules conversions.
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Formula
dJ = GJ × 10000000000
GJ = dJ × 1.000000000e-10
Conversion table
| 1 GJ | 1.000000e+10 dJ |
| 5 GJ | 5.000000e+10 dJ |
| 10 GJ | 1.000000e+11 dJ |
| 20 GJ | 2.000000e+11 dJ |
| 50 GJ | 5.000000e+11 dJ |
| 100 GJ | 1.000000e+12 dJ |
| 500 GJ | 5.000000e+12 dJ |
| 1000 GJ | 1.000000e+13 dJ |
Related conversions
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How the formula works
Both gigajoule and decijoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in gigajoules by 10000000000 to get decijoules. To reverse the conversion, multiply a decijoule value by 1.000000000e-10 to get back to gigajoules.
Frequently asked questions
What is Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
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 gigajoules to decijoules?
Multiply the gigajoule value by 10000000000 to get the equivalent in decijoules. For example, 5 GJ × 10000000000 = 5.000000e+10 dJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 10000000000 is an exact, non-rounded value.
Can I convert decijoules back to gigajoules?
Yes. Divide the decijoule value by 10000000000, or multiply it by 1.000000000e-10, to get gigajoules.
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About converting gigajoules to decijoules
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix. 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 gigajoules 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.