The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage.
Therms to Gigajoules
Convert US therm (therm) to Gigajoule (GJ) 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 gigajoules (GJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
GJ = therm × 0.1054804
Results update instantly for Therms to Gigajoules conversions.
Reserved above the conversion cards and below the converter.
Formula
GJ = therm × 0.1054804
therm = GJ × 9.48043428
Conversion table
| 1 therm | 0.105480 GJ |
| 5 therm | 0.527402 GJ |
| 10 therm | 1.054804 GJ |
| 20 therm | 2.109608 GJ |
| 50 therm | 5.274020 GJ |
| 100 therm | 10.548040 GJ |
| 500 therm | 52.740200 GJ |
| 1000 therm | 105.480400 GJ |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both us therm and gigajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in therms by 0.1054804 to get gigajoules. To reverse the conversion, multiply a gigajoule value by 9.48043428 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 Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
How do I convert therms to gigajoules?
Multiply the us therm value by 0.1054804 to get the equivalent in gigajoules. For example, 5 therm × 0.1054804 = 0.527402 GJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.1054804 is an exact, non-rounded value.
Can I convert gigajoules back to therms?
Yes. Divide the gigajoule value by 0.1054804, or multiply it by 9.48043428, to get therms.
Reserved between the FAQ and the article so the page stays balanced.
About converting therms to gigajoules
The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage. A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Use this calculator to move between therms and gigajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.