Watts to BTUs per Hour (W to BTU/h) Converter
1 watt (W) = 3.41214 BTUs per hour (BTU/h). To convert watts to BTUs per hour, multiply by 3.41214: 25 W × 3.41214 = 85.3035 BTU/h.
Quick facts
- 1 W = 3.41214 BTU/h
- 1 BTU/h = 0.293071 W
- Formula: BTU/h = W × 3.41214
- Quick estimate: multiply by about 3.4
How to convert watts to BTUs per hour
- Take the value in watts.
- Multiply it by 3.41214 (the number of BTUs per hour in one watt).
- Round the result to the precision you need.
Worked example: 25 W × 3.41214 = 85.3035 BTU/h.
To convert BTUs per hour back to watts, multiply by 0.293071, or divide by 3.41214.
Source: NIST SP 811 (2008), Appendix B (mechanical horsepower and international-table BTU).
Watts to BTUs per Hour conversion table
| Watts [W] | BTUs per Hour [BTU/h] |
|---|---|
| 0.01 W | 0.0341214163 BTU/h |
| 0.1 W | 0.3412141633 BTU/h |
| 1 W | 3.4121416328 BTU/h |
| 2 W | 6.8242832656 BTU/h |
| 3 W | 10.2364248984 BTU/h |
| 5 W | 17.060708164 BTU/h |
| 10 W | 34.121416328 BTU/h |
| 20 W | 68.2428326561 BTU/h |
| 50 W | 170.6070816402 BTU/h |
| 100 W | 341.2141632805 BTU/h |
| 1000 W | 3412.1416328045 BTU/h |
W to BTU/h chart from 1 to 100
- 1 W 3.41214 BTU/h
- 2 W 6.82428 BTU/h
- 3 W 10.2364 BTU/h
- 4 W 13.6486 BTU/h
- 5 W 17.0607 BTU/h
- 6 W 20.4728 BTU/h
- 7 W 23.885 BTU/h
- 8 W 27.2971 BTU/h
- 9 W 30.7093 BTU/h
- 10 W 34.1214 BTU/h
- 11 W 37.5336 BTU/h
- 12 W 40.9457 BTU/h
- 13 W 44.3578 BTU/h
- 14 W 47.77 BTU/h
- 15 W 51.1821 BTU/h
- 16 W 54.5943 BTU/h
- 17 W 58.0064 BTU/h
- 18 W 61.4185 BTU/h
- 19 W 64.8307 BTU/h
- 20 W 68.2428 BTU/h
- 25 W 85.3035 BTU/h
- 30 W 102.364 BTU/h
- 35 W 119.425 BTU/h
- 40 W 136.486 BTU/h
- 45 W 153.546 BTU/h
- 50 W 170.607 BTU/h
- 55 W 187.668 BTU/h
- 60 W 204.728 BTU/h
- 65 W 221.789 BTU/h
- 70 W 238.85 BTU/h
- 75 W 255.911 BTU/h
- 80 W 272.971 BTU/h
- 85 W 290.032 BTU/h
- 90 W 307.093 BTU/h
- 95 W 324.153 BTU/h
- 100 W 341.214 BTU/h
BTUs per Hour to Watts conversion table
| BTUs per Hour [BTU/h] | Watts [W] |
|---|---|
| 0.01 BTU/h | 0.0029307107 W |
| 0.1 BTU/h | 0.029307107 W |
| 1 BTU/h | 0.2930710702 W |
| 2 BTU/h | 0.5861421404 W |
| 3 BTU/h | 0.8792132106 W |
| 5 BTU/h | 1.465355351 W |
| 10 BTU/h | 2.930710702 W |
| 20 BTU/h | 5.861421404 W |
| 50 BTU/h | 14.65355351 W |
| 100 BTU/h | 29.30710702 W |
| 1000 BTU/h | 293.0710702 W |
Watts vs BTUs per Hour
| Watt | BTU per Hour | |
|---|---|---|
| Symbol | W | BTU/h |
| Equals | 1 W = 3.41214 BTU/h | 1 BTU/h = 0.293071 W |
What is a watt?
The SI derived unit of power, equal to one joule per second. Used for electrical appliance and device power ratings.
What is a BTU per hour?
The rate of one British thermal unit of heat transfer per hour. Used in the US for air conditioner and heater ratings.
Frequently asked questions
How many BTUs per hour are in a watt?
There are 3.41214 BTUs per hour in 1 watt (1 W = 3.4121416328 BTU/h).
How many watts are in a BTU per hour?
There are 0.293071 watts in 1 BTU per hour (1 BTU/h = 0.2930710702 W).
How do I convert watts to BTUs per hour?
Multiply the number of watts by 3.41214. For example, 10 W × 3.41214 = 34.1214 BTU/h. To convert back, multiply by 0.293071.
What is 10 W in BTUs per hour?
10 W = 34.1214 BTU/h.
What is 100 W in BTUs per hour?
100 W = 341.214 BTU/h.
Is the conversion exact?
Yes. The factor comes from the official definitions of both units (NIST SP 811 (2008), Appendix B (mechanical horsepower and international-table BTU)). Results are shown to up to 10 decimal places; round them to suit your purpose.
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