Therms to Kilowatt-hours
Convert therms to kilowatt-hours instantly. 1 thm = 29.3071070172 kWh. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert therms to kilowatt-hours
To convert therms to kilowatt-hours, multiply by 29.3071070172. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
kWh = thm × 29.3071070172
Therms to Kilowatt-hours conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Therms | Kilowatt-hours |
|---|---|
| 1 thm | 29.307107 kWh |
| 2 thm | 58.614214 kWh |
| 3 thm | 87.921321 kWh |
| 5 thm | 146.535535 kWh |
| 10 thm | 293.07107 kWh |
| 20 thm | 586.14214 kWh |
| 25 thm | 732.677675 kWh |
| 50 thm | 1,465.36 kWh |
| 100 thm | 2,930.71 kWh |
| 500 thm | 14,653.55 kWh |
| 1,000 thm | 29,307.11 kWh |
What is a therm?
100,000 BTU. The unit on US and UK gas bills.
What is a kilowatt-hour?
The unit on every electricity bill: a thousand watts for one hour.
The formula
kWh = thm × 29.3071070172
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Therms to Kilowatt-hours
- Type the number of therms you want to convert.
- Read the result in kilowatt-hours straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked kilowatt-hours to therms page.
Therms to Kilowatt-hours — frequently asked questions
How many kilowatt-hours are in a therm?
One therm equals 29.3071070172 kWh. kWh = thm × 29.3071070172
What is the formula to convert therms to kilowatt-hours?
The formula is kWh = thm × 29.3071070172. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert kilowatt-hours back to therms?
Divide instead of multiplying: one kilowatt-hour is 0.0341214163 thm. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this therms to kilowatt-hours free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error