Convert watts to BTU
1 watt equals 3.41214 BTUs per hour. To convert watts to BTUs per hour, multiply the number of watts by 3.41214: for example, 10 W is 34.1214 BTU/h. Ethical Tube's free watts to BTU converter does the math as you type, and the chart below lists common values.
1 W = 3.41214 BTU/h
- 1 W
- 3.41214 BTU/h
- 1 BTU/h
- 0.293071 W
- Formula
- BTU/h = W × 3.41214
- Measures
- Power
- Price
- Free
- Works offline
- Yes
Conversion chart
watts to BTU chart
| Watts (W) | BTUs per hour (BTU/h) |
|---|---|
| 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 |
| 8 W | 27.2971 BTU/h |
| 10 W | 34.1214 BTU/h |
| 12 W | 40.9457 BTU/h |
| 15 W | 51.1821 BTU/h |
| 20 W | 68.2428 BTU/h |
| 25 W | 85.3035 BTU/h |
| 50 W | 170.607 BTU/h |
| 100 W | 341.214 BTU/h |
How it works
How to convert watts to BTU
Know the formula
BTU/h = W × 3.41214. In words: multiply the number of watts by 3.41214.
Work an example
10 W → 34.1214 BTU/h. Round to two or three decimal places for everyday use.
Or type it in
Enter any value in the converter above and the answer appears instantly, in both directions.
Good to know
About power units
- This converter uses mechanical horsepower (745.7 watts), common for engines in the US and UK. Metric horsepower (PS) is slightly smaller, 735.5 watts.
- Air conditioner ratings in BTU are BTU per hour. A 12,000 BTU unit (one ton of cooling) uses about 3.5 kW of cooling power.
FAQ
Questions, answered
How many BTUs per hour are in a watt?
There are 3.41214 BTUs per hour in 1 watt. To convert watts to BTUs per hour, multiply the number of watts by 3.41214.
What is 10 watts in BTU?
10 watts is 34.1214 BTUs per hour.
How do you convert BTU back to watts?
Multiply the number of BTUs per hour by 0.293071. 1 BTU per hour is 0.293071 watts.
Is this watts to BTU converter free?
Yes. It's free and works in any browser, even offline once the page has loaded. The answer updates as you type, and nothing you enter is sent anywhere.
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