A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
Watt hours to Therms
Convert Watt-hour (Wh) to US therm (therm) instantly with an exact formula, conversion table, and FAQ.
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Convert watt hours (Wh) 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 = Wh × 0.00003412956341
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Formula
therm = Wh × 0.00003412956341
Wh = therm × 29300.11111
Conversion table
| 1 Wh | 0.000034 therm |
| 5 Wh | 0.000171 therm |
| 10 Wh | 0.000341 therm |
| 20 Wh | 0.000683 therm |
| 50 Wh | 0.001706 therm |
| 100 Wh | 0.003413 therm |
| 500 Wh | 0.017065 therm |
| 1000 Wh | 0.034130 therm |
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How the formula works
Both watt-hour and us therm measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in watt hours by 0.00003412956341 to get therms. To reverse the conversion, multiply a us therm value by 29300.11111 to get back to watt hours.
Frequently asked questions
What is Watt-hour (Wh)?
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
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 watt hours to therms?
Multiply the watt-hour value by 0.00003412956341 to get the equivalent in therms. For example, 5 Wh × 0.00003412956341 = 0.000171 therm.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.00003412956341 is an exact, non-rounded value.
Can I convert therms back to watt hours?
Yes. Divide the us therm value by 0.00003412956341, or multiply it by 29300.11111, to get watt hours.
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About converting watt hours to therms
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules. 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 watt hours 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.