A kilowatt-hour is 3.6 million joules.
kWhs to US therms Converter — kWh to therm
Convert kWh (kWh) to US therm (therm) using the exact conversion factor (1 kwh = 0.0341295634 us therm). See the formula, worked examples, conversion table, history, and common uses.
kWhs 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 3.6e+6 / 1.054804e+8.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting kWhs to US therms
kWh and US therm both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). kWh is most often used for residential and commercial electricity billing worldwide.
Formula
us therms = kwhs × 0.034129563407
This factor comes from each unit's defined relationship to the category's base unit: 1 kwh equals 3600000 base units, and 1 us therm equals 105480400 base units, so dividing one by the other gives the direct kwh-to-us therm factor of 0.034129563407.
Simple example
1 kWh × 0.03412956341 = 0.0341295634 therm
1 kwh = 0.0341295634 us therms.
Real-world example
100 kWh × 0.03412956341 = 3.412956341 therm
100 kwhs = 3.412956341 us therms.
Conversion table
| kWh (kWh) | US therm (therm) |
|---|---|
| 1 kWh | 0.0341295634 therm |
| 10 kWh | 0.3412956341 therm |
| 100 kWh | 3.412956341 therm |
| 500 kWh | 17.0647817 therm |
| 1,000 kWh | 34.12956341 therm |
| 2,000 kWh | 68.25912681 therm |
Reverse conversion: US therm to kWh
0.0341295634 therm × 29.30011111 = 0.9999999998 kWh
0.0341295634 us therms = 0.9999999998 kwhs.
kwhs = us therms × 29.3001111111
For a page dedicated to this direction, see US therm to kWh.
Understanding the kWh
kWh (kWh) measures energy. A kilowatt-hour is the energy of one kilowatt of power sustained for one hour: exactly 3,600,000 joules. It is classified as a Non-SI unit accepted for use with SI.
Where it's used: Used worldwide for electricity billing
Uses of the kWh today
- Residential and commercial electricity billing worldwide
- Battery capacity ratings (especially electric vehicles)
- Energy policy and grid-scale power statistics
History of the kWh
The kilowatt-hour became the standard electricity billing unit as power utilities expanded in the late 19th and early 20th centuries, since it conveniently matches the scale of typical household electricity consumption, unlike the much smaller joule.
Historical origin. kWh was not the invention of a single named person; it developed through the process described above.
Understanding the US therm (therm)
US therm used for natural gas energy.
kWh — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the kilowatt-hour among accepted non-SI energy units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many us therms are in 1 kwh?
1 kwh equals 0.0341295634 us therms, using the exact defined conversion factor rather than an estimate.
How do I convert kwh to us therm?
Multiply the kwh value by 0.03412956341. The converter above does this instantly to whatever precision you set.
How do I convert us therm back to kwh?
Use the reverse factor: 1 us therm equals 29.30011111 kwhs. You can also use the swap control in the converter above to flip the direction instantly.
What is a kwh?
kWh (kWh) measures energy. A kilowatt-hour is the energy of one kilowatt of power sustained for one hour: exactly 3,600,000 joules. It is classified as a Non-SI unit accepted for use with SI.
What is a us therm?
US therm (therm) is a unit of energy.
Is the kwh to us therm conversion exact?
Yes. A kilowatt-hour is the energy of one kilowatt of power sustained for one hour: exactly 3,600,000 joules. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the kwh still used today?
Used worldwide for electricity billing