A watt-hour is 3,600 joules.
Watt-hours to US therms Converter — Wh to therm
Convert Watt-hour (Wh) to US therm (therm) using the exact conversion factor (1 watt-hour = 0.0000341296 us therm). See the formula, worked examples, conversion table, and common uses.
Watt-hours to US therms converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
US therm used for natural gas energy.
Result = input x 3600 / 1.054804e+8.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Watt-hours to US therms
Watt-hour and US therm both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Watt-hour is most often used for phone, laptop, and power-bank battery capacity ratings.
Formula
us therms = watt-hours × 0.000034129563407
This factor comes from each unit's defined relationship to the category's base unit: 1 watt-hour equals 3600 base units, and 1 us therm equals 105480400 base units, so dividing one by the other gives the direct watt-hour-to-us therm factor of 0.000034129563407.
Simple example
1 Wh × 0.00003412956341 = 0.0000341296 therm
1 watt-hour = 0.0000341296 us therms.
Real-world example
100 Wh × 0.00003412956341 = 0.0034129563 therm
100 watt-hours = 0.0034129563 us therms.
Conversion table
| Watt-hour (Wh) | US therm (therm) |
|---|---|
| 1 Wh | 0.0000341296 therm |
| 10 Wh | 0.0003412956 therm |
| 100 Wh | 0.0034129563 therm |
| 500 Wh | 0.0170647817 therm |
| 1,000 Wh | 0.0341295634 therm |
| 2,000 Wh | 0.0682591268 therm |
Reverse conversion: US therm to Watt-hour
0.0000341296 therm × 29300.11111 = 1.000001072 Wh
0.0000341296 us therms = 1.000001072 watt-hours.
watt-hours = us therms × 29300.1111111
For a page dedicated to this direction, see US therm to Watt-hour.
Understanding the Watt-hour
Watt-hour (Wh) measures energy. The energy delivered by one watt of power sustained for one hour — equal to 3,600 joules. It is classified as a metric derived energy unit.
Where it's used: Universal — standard consumer-electronics and battery energy unit worldwide
Wh vs. kWh. The same unit at different scales: 1,000 Wh equals 1 kWh. Wh suits small consumer-electronics batteries; kWh is used for household electricity billing and larger energy storage.
Uses of the Watt-hour today
- Phone, laptop, and power-bank battery capacity ratings
- Electric-vehicle battery capacity specifications
- Small-scale renewable energy (solar panel) output ratings
Understanding the US therm (therm)
US therm used for natural gas energy.
Watt-hour — sources
- BIPM SI Brochure — Watt-hour as a common energy unit derived from the coherent SI units watt and second (via the hour).
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many us therms are in 1 watt-hour?
1 watt-hour equals 0.0000341296 us therms, using the exact defined conversion factor rather than an estimate.
How do I convert watt-hour to us therm?
Multiply the watt-hour value by 0.00003412956341. The converter above does this instantly to whatever precision you set.
How do I convert us therm back to watt-hour?
Use the reverse factor: 1 us therm equals 29,300.11111 watt-hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a watt-hour?
Watt-hour (Wh) measures energy. The energy delivered by one watt of power sustained for one hour — equal to 3,600 joules. It is classified as a metric derived energy unit.
What is a us therm?
US therm (therm) is a unit of energy.
Is the watt-hour to us therm conversion exact?
Yes. Both watt-hour and us therm are defined by fixed standards rather than physical artifacts, so the factor of 0.00003412956341 used above is exact to as many digits as you choose to display.
What is the difference between wh vs. kwh?
The same unit at different scales: 1,000 Wh equals 1 kWh. Wh suits small consumer-electronics batteries; kWh is used for household electricity billing and larger energy storage.
Where is the watt-hour still used today?
Universal — standard consumer-electronics and battery energy unit worldwide