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 Therms
Convert Rontojoule (rJ) to US therm (therm) 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 rontojoules (rJ) to therms (therm) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage.
therm = rJ × 9.480434280e-36
Results update instantly for Rontojoules to Therms conversions.
Reserved above the conversion cards and below the converter.
Formula
therm = rJ × 9.480434280e-36
rJ = therm × 1.054804000e+35
Conversion table
| 1 rJ | 9.480434e-36 therm |
| 5 rJ | 4.740217e-35 therm |
| 10 rJ | 9.480434e-35 therm |
| 20 rJ | 1.896087e-34 therm |
| 50 rJ | 4.740217e-34 therm |
| 100 rJ | 9.480434e-34 therm |
| 500 rJ | 4.740217e-33 therm |
| 1000 rJ | 9.480434e-33 therm |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both rontojoule and us therm measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in rontojoules by 9.480434280e-36 to get therms. To reverse the conversion, multiply a us therm value by 1.054804000e+35 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 US therm (therm)?
The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage.
How do I convert rontojoules to therms?
Multiply the rontojoule value by 9.480434280e-36 to get the equivalent in therms. For example, 5 rJ × 9.480434280e-36 = 4.740217e-35 therm.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 9.480434280e-36 is an exact, non-rounded value.
Can I convert therms back to rontojoules?
Yes. Divide the us therm value by 9.480434280e-36, or multiply it by 1.054804000e+35, to get rontojoules.
Reserved between the FAQ and the article so the page stays balanced.
About converting rontojoules to therms
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. The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage.
Use this calculator to move between rontojoules and therms accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.