Instantly convert watts (W) to BTU per hour (BTU/h). Bidirectional, accurate, and free.
To convert watts to BTU per hour, use the formula BTU per hour = watts × 3.4121. For example, 2 watts equals 6.8243 BTU per hour. Type any number into the calculator above and the result appears instantly — you can also type into the BTU per hour box to convert the other way.
| Watts | BTU per hour |
|---|---|
| 1 W | 3.4121 BTU/h |
| 2 W | 6.8243 BTU/h |
| 5 W | 17.0607 BTU/h |
| 10 W | 34.1214 BTU/h |
| 25 W | 85.3035 BTU/h |
| 50 W | 170.61 BTU/h |
| 100 W | 341.21 BTU/h |
| 200 W | 682.43 BTU/h |
There are 3.4121 BTU per hour in one watt. To convert any value, apply the formula BTU per hour = watts × 3.4121.
The formula is BTU per hour = watts × 3.4121. Enter a value above and the result updates instantly in both directions.
Yes. It uses the exact internationally-defined conversion factor, so results match official standards to several decimal places.
Yes — the converter is bidirectional. Type in either box and the other updates automatically using the inverse formula.