A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
Kilojoules to Gigajoules
Convert Kilojoule (kJ) to Gigajoule (GJ) instantly with an exact formula, conversion table, and FAQ.
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Convert kilojoules (kJ) to gigajoules (GJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
GJ = kJ × 0.000001
Results update instantly for Kilojoules to Gigajoules conversions.
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Formula
GJ = kJ × 0.000001
kJ = GJ × 1000000
Conversion table
| 1 kJ | 0.000001 GJ |
| 5 kJ | 0.000005 GJ |
| 10 kJ | 0.000010 GJ |
| 20 kJ | 0.000020 GJ |
| 50 kJ | 0.000050 GJ |
| 100 kJ | 0.000100 GJ |
| 500 kJ | 0.000500 GJ |
| 1000 kJ | 0.001000 GJ |
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How the formula works
Both kilojoule and gigajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in kilojoules by 0.000001 to get gigajoules. To reverse the conversion, multiply a gigajoule value by 1000000 to get back to kilojoules.
Frequently asked questions
What is Kilojoule (kJ)?
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
What is Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
How do I convert kilojoules to gigajoules?
Multiply the kilojoule value by 0.000001 to get the equivalent in gigajoules. For example, 5 kJ × 0.000001 = 0.000005 GJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.000001 is an exact, non-rounded value.
Can I convert gigajoules back to kilojoules?
Yes. Divide the gigajoule value by 0.000001, or multiply it by 1000000, to get kilojoules.
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About converting kilojoules to gigajoules
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States. A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Use this calculator to move between kilojoules and gigajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.