The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage.
Therms to Joules
Convert US therm (therm) to Joule (J) 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 therms (therm) to joules (J) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
J = therm × 105480400
Results update instantly for Therms to Joules conversions.
Reserved above the conversion cards and below the converter.
Formula
J = therm × 105480400
therm = J × 9.480434280e-09
Conversion table
| 1 therm | 1.054804e+08 J |
| 5 therm | 5.274020e+08 J |
| 10 therm | 1.054804e+09 J |
| 20 therm | 2.109608e+09 J |
| 50 therm | 5.274020e+09 J |
| 100 therm | 1.054804e+10 J |
| 500 therm | 5.274020e+10 J |
| 1000 therm | 1.054804e+11 J |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both us therm and joule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in therms by 105480400 to get joules. To reverse the conversion, multiply a joule value by 9.480434280e-09 to get back to therms.
Frequently asked questions
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.
What is Joule (J)?
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
How do I convert therms to joules?
Multiply the us therm value by 105480400 to get the equivalent in joules. For example, 5 therm × 105480400 = 5.274020e+08 J.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 105480400 is an exact, non-rounded value.
Can I convert joules back to therms?
Yes. Divide the joule value by 105480400, or multiply it by 9.480434280e-09, to get therms.
Reserved between the FAQ and the article so the page stays balanced.
About converting therms to joules
The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage. The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
Use this calculator to move between therms and joules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.