A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Gigajoules to Therms
Convert Gigajoule (GJ) 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 gigajoules (GJ) 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 = GJ × 9.48043428
Results update instantly for Gigajoules to Therms conversions.
Reserved above the conversion cards and below the converter.
Formula
therm = GJ × 9.48043428
GJ = therm × 0.1054804
Conversion table
| 1 GJ | 9.480434 therm |
| 5 GJ | 47.402171 therm |
| 10 GJ | 94.804343 therm |
| 20 GJ | 189.608686 therm |
| 50 GJ | 474.021714 therm |
| 100 GJ | 948.043428 therm |
| 500 GJ | 4740.217140 therm |
| 1000 GJ | 9480.434280 therm |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both gigajoule and us therm measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in gigajoules by 9.48043428 to get therms. To reverse the conversion, multiply a us therm value by 0.1054804 to get back to gigajoules.
Frequently asked questions
What is Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga 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 gigajoules to therms?
Multiply the gigajoule value by 9.48043428 to get the equivalent in therms. For example, 5 GJ × 9.48043428 = 47.402171 therm.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 9.48043428 is an exact, non-rounded value.
Can I convert therms back to gigajoules?
Yes. Divide the us therm value by 9.48043428, or multiply it by 0.1054804, to get gigajoules.
Reserved between the FAQ and the article so the page stays balanced.
About converting gigajoules to therms
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga 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 gigajoules 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.