BTU to Watt-hours
Convert btu to watt-hours instantly. 1 BTU = 0.2930710702 Wh. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert btu to watt-hours
To convert btu to watt-hours, divide by 3.4121416331 (multiply by 0.2930710702). 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.
Wh = BTU × 0.2930710702
BTU to Watt-hours conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| BTU | Watt-hours |
|---|---|
| 1 BTU | 0.293071 Wh |
| 2 BTU | 0.586142 Wh |
| 3 BTU | 0.879213 Wh |
| 5 BTU | 1.465355 Wh |
| 10 BTU | 2.930711 Wh |
| 20 BTU | 5.861421 Wh |
| 25 BTU | 7.326777 Wh |
| 50 BTU | 14.653554 Wh |
| 100 BTU | 29.307107 Wh |
| 500 BTU | 146.535535 Wh |
| 1,000 BTU | 293.07107 Wh |
What is a btu?
British thermal unit, used for heating and air-conditioning capacity.
What is a watt-hour?
One watt sustained for one hour. Battery capacity is quoted this way.
The formula
Wh = BTU × 0.2930710702
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 BTU to Watt-hours
- Type the number of btu you want to convert.
- Read the result in watt-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 watt-hours to btu page.
BTU to Watt-hours — frequently asked questions
How many watt-hours are in a btu?
One btu equals 0.2930710702 Wh. Wh = BTU × 0.2930710702
What is the formula to convert btu to watt-hours?
The formula is Wh = BTU × 0.2930710702. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert watt-hours back to btu?
Divide instead of multiplying: one watt-hour is 3.4121416331 BTU. 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 btu to watt-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
This page answers each of these searches. They are the exact phrases visitors use to find the btu to watt-hours.
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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