A rontojoule (rJ) is a metric-prefixed unit of energy equal to 10-27 joules, a fraction of a single joule, using the SI ronto prefix.
Rontojoules to Microjoules
Convert Rontojoule (rJ) to Microjoule (uJ) instantly with an exact formula, conversion table, and FAQ.
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Convert rontojoules (rJ) to microjoules (uJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A microjoule (uJ) is a metric-prefixed unit of energy equal to 10-6 joules, a fraction of a single joule, using the SI micro prefix.
uJ = rJ × 1.000000000e-21
Results update instantly for Rontojoules to Microjoules conversions.
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Formula
uJ = rJ × 1.000000000e-21
rJ = uJ × 1.000000000e+21
Conversion table
| 1 rJ | 1.000000e-21 uJ |
| 5 rJ | 5.000000e-21 uJ |
| 10 rJ | 1.000000e-20 uJ |
| 20 rJ | 2.000000e-20 uJ |
| 50 rJ | 5.000000e-20 uJ |
| 100 rJ | 1.000000e-19 uJ |
| 500 rJ | 5.000000e-19 uJ |
| 1000 rJ | 1.000000e-18 uJ |
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How the formula works
Both rontojoule and microjoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in rontojoules by 1.000000000e-21 to get microjoules. To reverse the conversion, multiply a microjoule value by 1.000000000e+21 to get back to rontojoules.
Frequently asked questions
What is Rontojoule (rJ)?
A rontojoule (rJ) is a metric-prefixed unit of energy equal to 10-27 joules, a fraction of a single joule, using the SI ronto prefix.
What is Microjoule (uJ)?
A microjoule (uJ) is a metric-prefixed unit of energy equal to 10-6 joules, a fraction of a single joule, using the SI micro prefix.
How do I convert rontojoules to microjoules?
Multiply the rontojoule value by 1.000000000e-21 to get the equivalent in microjoules. For example, 5 rJ × 1.000000000e-21 = 5.000000e-21 uJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.000000000e-21 is an exact, non-rounded value.
Can I convert microjoules back to rontojoules?
Yes. Divide the microjoule value by 1.000000000e-21, or multiply it by 1.000000000e+21, to get rontojoules.
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About converting rontojoules to microjoules
A rontojoule (rJ) is a metric-prefixed unit of energy equal to 10-27 joules, a fraction of a single joule, using the SI ronto prefix. A microjoule (uJ) is a metric-prefixed unit of energy equal to 10-6 joules, a fraction of a single joule, using the SI micro prefix.
Use this calculator to move between rontojoules and microjoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.