The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
Btu to Therms
Convert British thermal unit (BTU) to US therm (therm) instantly with an exact formula, conversion table, and FAQ.
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Convert btu (BTU) 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 = BTU × 0.00001000238767
Results update instantly for Btu to Therms conversions.
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Formula
therm = BTU × 0.00001000238767
BTU = therm × 99976.12898
Conversion table
| 1 BTU | 0.000010 therm |
| 5 BTU | 0.000050 therm |
| 10 BTU | 0.000100 therm |
| 20 BTU | 0.000200 therm |
| 50 BTU | 0.000500 therm |
| 100 BTU | 0.001000 therm |
| 500 BTU | 0.005001 therm |
| 1000 BTU | 0.010002 therm |
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How the formula works
Both british thermal unit and us therm measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in btu by 0.00001000238767 to get therms. To reverse the conversion, multiply a us therm value by 99976.12898 to get back to btu.
Frequently asked questions
What is British thermal unit (BTU)?
The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
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 btu to therms?
Multiply the british thermal unit value by 0.00001000238767 to get the equivalent in therms. For example, 5 BTU × 0.00001000238767 = 0.000050 therm.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.00001000238767 is an exact, non-rounded value.
Can I convert therms back to btu?
Yes. Divide the us therm value by 0.00001000238767, or multiply it by 99976.12898, to get btu.
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About converting btu to therms
The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings. 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 btu 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.