Power and Energy
Whtotherm
Convert watt-hours (Wh) to US therms (therm).
Factor1 Wh = 3.412956e-5 therm
Converter
Wh
Accepts numbers or expressions, e.g. 150 + 14.7
Result
therm
Rendered to 6 significant figures.
Formula
Formula
therm = Wh × 3.412956e-5
Multiply any value in watt-hours by 3.412956e-5 to obtain the value in US therms.
Worked example
Convert 100000 Wh to therm.
- 01Start with 100000 Wh.
- 02Multiply by the conversion factor: 100000 × 3.412956e-5 = 3.41296 therm.
Result100000 Wh = 3.41296 therm
Conversion table
| Wh | therm |
|---|---|
| 1 | 3.413e-5 |
| 2 | 6.8259e-5 |
| 5 | 0.00017065 |
| 10 | 0.0003413 |
| 20 | 0.00068259 |
| 50 | 0.0017065 |
| 100 | 0.003413 |
| 200 | 0.0068259 |
| 500 | 0.017065 |
| 1000 | 0.03413 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Wh to therm?
1 Wh equals 3.412956e-5 therm. To convert, multiply the value in watt-hours by 3.412956e-5.
How do I convert 1 Wh to therm?
1 Wh = 3.41296e-5 therm. For any value, multiply by 3.412956e-5.
How do I convert therm back to Wh?
Divide by the same factor — or equivalently, multiply by 29300.11. So 1 therm = 29300.1 Wh.
When would I need to convert watt-hour to US therm?
Energy conversions are needed when reconciling fuel/electrical billing, calculating thermal duties, and aligning calorimetry or HHV/LHV figures across data sources.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).