The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage.
Therms to Zettajoules
Convert US therm (therm) to Zettajoule (ZJ) instantly with an exact formula, conversion table, and FAQ.
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Convert therms (therm) to zettajoules (ZJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A zettajoule (ZJ) is a metric-prefixed unit of energy equal to 1021 joules, using the SI zetta prefix.
ZJ = therm × 1.054804000e-13
Results update instantly for Therms to Zettajoules conversions.
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Formula
ZJ = therm × 1.054804000e-13
therm = ZJ × 9480434279733
Conversion table
| 1 therm | 1.054804e-13 ZJ |
| 5 therm | 5.274020e-13 ZJ |
| 10 therm | 1.054804e-12 ZJ |
| 20 therm | 2.109608e-12 ZJ |
| 50 therm | 5.274020e-12 ZJ |
| 100 therm | 1.054804e-11 ZJ |
| 500 therm | 5.274020e-11 ZJ |
| 1000 therm | 1.054804e-10 ZJ |
Related conversions
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How the formula works
Both us therm and zettajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in therms by 1.054804000e-13 to get zettajoules. To reverse the conversion, multiply a zettajoule value by 9480434279733 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 Zettajoule (ZJ)?
A zettajoule (ZJ) is a metric-prefixed unit of energy equal to 1021 joules, using the SI zetta prefix.
How do I convert therms to zettajoules?
Multiply the us therm value by 1.054804000e-13 to get the equivalent in zettajoules. For example, 5 therm × 1.054804000e-13 = 5.274020e-13 ZJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1.054804000e-13 is an exact, non-rounded value.
Can I convert zettajoules back to therms?
Yes. Divide the zettajoule value by 1.054804000e-13, or multiply it by 9480434279733, to get therms.
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About converting therms to zettajoules
The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage. A zettajoule (ZJ) is a metric-prefixed unit of energy equal to 1021 joules, using the SI zetta prefix.
Use this calculator to move between therms and zettajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.