The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage.
Therms to Ergs
Convert US therm (therm) to Erg (erg) instantly with an exact formula, conversion table, and FAQ.
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Convert therms (therm) to ergs (erg) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
erg = therm × 1.054804000e+15
Results update instantly for Therms to Ergs conversions.
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Formula
erg = therm × 1.054804000e+15
therm = erg × 9.480434280e-16
Conversion table
| 1 therm | 1.054804e+15 erg |
| 5 therm | 5.274020e+15 erg |
| 10 therm | 1.054804e+16 erg |
| 20 therm | 2.109608e+16 erg |
| 50 therm | 5.274020e+16 erg |
| 100 therm | 1.054804e+17 erg |
| 500 therm | 5.274020e+17 erg |
| 1000 therm | 1.054804e+18 erg |
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How the formula works
Both us therm and erg measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in therms by 1.054804000e+15 to get ergs. To reverse the conversion, multiply a erg value by 9.480434280e-16 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 Erg (erg)?
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
How do I convert therms to ergs?
Multiply the us therm value by 1.054804000e+15 to get the equivalent in ergs. For example, 5 therm × 1.054804000e+15 = 5.274020e+15 erg.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.054804000e+15 is an exact, non-rounded value.
Can I convert ergs back to therms?
Yes. Divide the erg value by 1.054804000e+15, or multiply it by 9.480434280e-16, to get therms.
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About converting therms to ergs
The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage. An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
Use this calculator to move between therms and ergs accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.