A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Gigajoules to Ronnajoules
Convert Gigajoule (GJ) to Ronnajoule (RJ) instantly with an exact formula, conversion table, and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Energy calculator
Energy Converter
Convert gigajoules (GJ) to ronnajoules (RJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A ronnajoule (RJ) is a metric-prefixed unit of energy equal to 1027 joules, using the SI ronna prefix.
RJ = GJ × 1.000000000e-18
Results update instantly for Gigajoules to Ronnajoules conversions.
Reserved above the conversion cards and below the converter.
Formula
RJ = GJ × 1.000000000e-18
GJ = RJ × 1.000000000e+18
Conversion table
| 1 GJ | 1.000000e-18 RJ |
| 5 GJ | 5.000000e-18 RJ |
| 10 GJ | 1.000000e-17 RJ |
| 20 GJ | 2.000000e-17 RJ |
| 50 GJ | 5.000000e-17 RJ |
| 100 GJ | 1.000000e-16 RJ |
| 500 GJ | 5.000000e-16 RJ |
| 1000 GJ | 1.000000e-15 RJ |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both gigajoule and ronnajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in gigajoules by 1.000000000e-18 to get ronnajoules. To reverse the conversion, multiply a ronnajoule value by 1.000000000e+18 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 Ronnajoule (RJ)?
A ronnajoule (RJ) is a metric-prefixed unit of energy equal to 1027 joules, using the SI ronna prefix.
How do I convert gigajoules to ronnajoules?
Multiply the gigajoule value by 1.000000000e-18 to get the equivalent in ronnajoules. For example, 5 GJ × 1.000000000e-18 = 5.000000e-18 RJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-18 is an exact, non-rounded value.
Can I convert ronnajoules back to gigajoules?
Yes. Divide the ronnajoule value by 1.000000000e-18, or multiply it by 1.000000000e+18, to get gigajoules.
Reserved between the FAQ and the article so the page stays balanced.
About converting gigajoules to ronnajoules
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix. A ronnajoule (RJ) is a metric-prefixed unit of energy equal to 1027 joules, using the SI ronna prefix.
Use this calculator to move between gigajoules and ronnajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.