Watts to BTU per hour
Type a value in Watts and get the result in BTU per hour, calculated exactly.
100 Watts ≈ 341.2141633 BTU per hour
Precision
Exact factorRounded for display to about 10 significant digits.
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Formula
BTU/h = W × 3.41214163313
To convert Watts to BTU per hour, multiply the value by 3.41214163313.
Worked examples
- 1 W × 3.41214163313 ≈ 3.412141633 BTU/h
- 100 W × 3.41214163313 ≈ 341.2141633 BTU/h
- 50 W × 3.41214163313 ≈ 170.6070817 BTU/h
This factor is exact by definition.
Conversion table
| Watts (W) | BTU per hour (BTU/h) |
|---|---|
| 1 | ≈ 3.412142 |
| 2 | ≈ 6.824283 |
| 3 | ≈ 10.23642 |
| 4 | ≈ 13.64857 |
| 5 | ≈ 17.06071 |
| 6 | ≈ 20.47285 |
| 7 | ≈ 23.88499 |
| 8 | ≈ 27.29713 |
| 9 | ≈ 30.70927 |
| 10 | ≈ 34.12142 |
| 15 | ≈ 51.18212 |
| 20 | ≈ 68.24283 |
| 25 | ≈ 85.30354 |
| 30 | ≈ 102.3642 |
| 40 | ≈ 136.4857 |
| 50 | ≈ 170.6071 |
| 60 | ≈ 204.7285 |
| 70 | ≈ 238.8499 |
| 75 | ≈ 255.9106 |
| 80 | ≈ 272.9713 |
| 90 | ≈ 307.0927 |
| 100 | ≈ 341.2142 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: BTU per hour to Watts
| BTU per hour (BTU/h) | Watts (W) |
|---|---|
| 1 | ≈ 0.2930711 |
| 2 | ≈ 0.5861421 |
| 3 | ≈ 0.8792132 |
| 4 | ≈ 1.172284 |
| 5 | ≈ 1.465355 |
| 6 | ≈ 1.758426 |
| 7 | ≈ 2.051497 |
| 8 | ≈ 2.344569 |
| 9 | 2.63763963155 |
| 10 | ≈ 2.930711 |
| 15 | ≈ 4.396066 |
| 20 | ≈ 5.861421 |
| 25 | ≈ 7.326777 |
| 30 | ≈ 8.792132 |
| 40 | ≈ 11.72284 |
| 50 | ≈ 14.65355 |
| 60 | ≈ 17.58426 |
| 70 | ≈ 20.51497 |
| 75 | ≈ 21.98033 |
| 80 | ≈ 23.44569 |
| 90 | 26.3763963155 |
| 100 | ≈ 29.30711 |
Unit definitions
- Watts W
- The SI unit of power: one joule per second.
- BTU per hour BTU/h
- One International Table BTU per hour: about 0.29307 watts.
Questions people ask
Watts to BTU per hour: what is the conversion factor?
One W is ≈ 3.412141633 BTU/h.
How do I convert Watts to BTU per hour?
Use the formula above. For example, 100 W = ≈ 341.2141633 BTU/h.
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.