Convert watts to BTU per hour
Watt (W) to BTU per hour (BTU/h). One watt equals 3.4121 BTU per hour.
Formula
Watt to BTU per hour conversion table
| Watts | BTU per hour | BTU per hour | Watts |
|---|---|---|---|
| 1 W | 3.4121 BTU/h | 1 BTU/h | 0.293071 W |
| 2 W | 6.8243 BTU/h | 2 BTU/h | 0.586142 W |
| 3 W | 10.2364 BTU/h | 3 BTU/h | 0.879213 W |
| 5 W | 17.0607 BTU/h | 5 BTU/h | 1.4654 W |
| 10 W | 34.1214 BTU/h | 10 BTU/h | 2.9307 W |
| 20 W | 68.2428 BTU/h | 20 BTU/h | 5.8614 W |
| 50 W | 170.61 BTU/h | 50 BTU/h | 14.6536 W |
| 100 W | 341.21 BTU/h | 100 BTU/h | 29.3071 W |
| 500 W | 1706.07 BTU/h | 500 BTU/h | 146.54 W |
| 1000 W | 3412.14 BTU/h | 1000 BTU/h | 293.07 W |
To convert watts to BTU per hour, multiply the number of watts by 3.4121. One watt equals 3.4121 BTU per hour, and one BTU per hour equals 0.293071 watts, so the relationship is fixed and exact. As a worked example, 10 W comes to 34.1214 BTU/h. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a power conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common watt values already worked out in BTU per hour, plus the reverse BTU per hour to watt direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many BTU per hour are in a watt?
One watt equals 3.4121 BTU per hour. The ratio is constant, so you can multiply any number of watts by 3.4121 to get BTU per hour.
What is the formula to convert watts to BTU per hour?
Use BTU per hour = watts × 3.4121. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert BTU per hour back to watts?
Go the other way by using one BTU per hour equals 0.293071 watts. You can also press the swap button in the converter above to flip the direction in one click.
Is this watt to BTU per hour converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.