Convert watt to BTU per hour
1 W = 3.412141633 BTU/h
1 W = 3.4121 BTU/h
1 W in every power unit
| nanowatt | 1,000,000,000 nW |
| erg per second | 10,000,000 erg/s |
| microwatt | 1,000,000 μW |
| milliwatt | 1,000 mW |
| foot pound-force per minute | 44.254 ft·lbf/min |
| BTU per hour | 3.4121 BTU/h |
| watt | 1 W |
| kilocalorie per hour | 0.85985 kcal/h |
| foot pound-force per second | 0.73756 ft·lbf/s |
| thousand BTU per hour | 0.0034121 MBH |
| metric horsepower | 0.0013596 PS |
| horsepower (mechanical) | 0.001341 hp |
| electrical horsepower | 0.0013405 hp (elec) |
| kilowatt | 0.001 kW |
| ton of refrigeration | 0.00028435 ton |
| boiler horsepower | 0.00010194 bhp |
| million BTU per hour | 0.0000034121 MMBTU/h |
| megawatt | 0.000001 MW |
| gigawatt | 1.0000e-09 GW |
| terawatt | 1.0000e-12 TW |
| solar luminosity | 2.6123e-27 Lsun |
How the conversion works
Multiply by 3.412141633 to go from watt to BTU per hour, or divide by it to go back. Every conversion on this site routes through the SI value (W) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? BTU per hour to watt — 1 BTU/h = 0.2930710702 W.
watt to BTU per hour — common values
| 1 W | 3.4121416 BTU/h |
| 2 W | 6.8242833 BTU/h |
| 3 W | 10.236425 BTU/h |
| 5 W | 17.060708 BTU/h |
| 10 W | 34.121416 BTU/h |
| 15 W | 51.182124 BTU/h |
| 20 W | 68.242833 BTU/h |
| 25 W | 85.303541 BTU/h |
| 50 W | 170.60708 BTU/h |
| 75 W | 255.91062 BTU/h |
| 100 W | 341.21416 BTU/h |
| 250 W | 853.03541 BTU/h |
| 500 W | 1,706.0708 BTU/h |
| 1000 W | 3,412.1416 BTU/h |