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.
Microjoules to Rontojoules
Convert Microjoule (uJ) to Rontojoule (rJ) instantly with an exact formula, conversion table, and FAQ.
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Convert microjoules (uJ) to rontojoules (rJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
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.
rJ = uJ × 1.000000000e+21
Results update instantly for Microjoules to Rontojoules conversions.
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Formula
rJ = uJ × 1.000000000e+21
uJ = rJ × 1.000000000e-21
Conversion table
| 1 uJ | 1.000000e+21 rJ |
| 5 uJ | 5.000000e+21 rJ |
| 10 uJ | 1.000000e+22 rJ |
| 20 uJ | 2.000000e+22 rJ |
| 50 uJ | 5.000000e+22 rJ |
| 100 uJ | 1.000000e+23 rJ |
| 500 uJ | 5.000000e+23 rJ |
| 1000 uJ | 1.000000e+24 rJ |
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How the formula works
Both microjoule and rontojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in microjoules by 1.000000000e+21 to get rontojoules. To reverse the conversion, multiply a rontojoule value by 1.000000000e-21 to get back to microjoules.
Frequently asked questions
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.
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.
How do I convert microjoules to rontojoules?
Multiply the microjoule value by 1.000000000e+21 to get the equivalent in rontojoules. For example, 5 uJ × 1.000000000e+21 = 5.000000e+21 rJ.
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 rontojoules back to microjoules?
Yes. Divide the rontojoule value by 1.000000000e+21, or multiply it by 1.000000000e-21, to get microjoules.
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About converting microjoules to rontojoules
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. 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.
Use this calculator to move between microjoules and rontojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.