1 Btu = 0.29307222222222 Wh
1 British thermal unit (Btu) = 0.29307222222222 Watt hour (Wh).
If you want to reverse convert, use Watt hour → British thermal unit. 1 Wh = 3.412128220196 Btu. You can also explore the full Energy converter page for more cross conversions.
Conversion formula
British thermal unit to Watt hour formula: value in Wh = value in Btu × 0.29307222222222.
Watt hour to British thermal unit formula: value in Btu = value in Wh × 3.412128220196.
How to convert British thermal unit to Watt hour
To convert British thermal unit to Watt hour, multiply the value in Btu by 0.29307222222222. This gives the result in Wh.
For example, 1 Btu = 0.29307222222222 Wh and 10 Btu = 2.9307222222222 Wh.
What is British thermal unit?
British thermal unit (Btu): A heat-energy unit found in heating and cooling specifications; Btu/h instead measures power. 1 Btu ≈ 1055.06 J.
What is Watt hour?
Watt hour (Wh): The energy used by a one-watt device running for one hour; common in battery specifications. 1 Wh = 1 W × 1 h = 3600 J.
FAQ
How many watt hour are in 1 british thermal unit?
There are 0.29307222222222 Wh in 1 Btu.
Why can conversion results differ slightly?
Check the unit definition and rounding. US and imperial measures can differ; rounding intermediate values can also change the final digits.
How do I convert british thermal unit to watt hour?
Multiply the value in Btu by 0.29307222222222 to get the value in Wh.
British thermal unit → other Energy units
- 1 british thermal unit → joule = 1055.06 joule
- 1 british thermal unit → kilojoule = 1.05506 kilojoule
- 1 british thermal unit → megajoule = 0.00105506 megajoule
- 1 british thermal unit → calorie = 252.16539196941 calorie
- 1 british thermal unit → kilocalorie = 0.25216539196941 kilocalorie
- 1 british thermal unit → watt hour = 0.29307222222222 watt hour
- 1 british thermal unit → kilowatt hour = 0.00029307222222222 kilowatt hour
- 1 british thermal unit = 2.9307222222222E-7 megawatt hour
- 1 british thermal unit → foot pound = 778.17114366214 foot pound
- 1 british thermal unit = 6.5851665641006E+15 mega electron volt
- 1 british thermal unit = 6.5851665641006E+21 electron volt
British thermal unit → Watt hour Table
The table below shows common values from British thermal unit to Watt hour and the reverse direction for quick reference.
| Btu | Wh | Rounded |
|---|---|---|
| 1 Btu | 0.29307222222222 Wh | 0.2931 |
| 2 Btu | 0.58614444444444 Wh | 0.5861 |
| 3 Btu | 0.87921666666667 Wh | 0.8792 |
| 4 Btu | 1.1722888888889 Wh | 1.1723 |
| 5 Btu | 1.4653611111111 Wh | 1.4654 |
| 10 Btu | 2.9307222222222 Wh | 2.9307 |
| 12 Btu | 3.5168666666667 Wh | 3.5169 |
| 15 Btu | 4.3960833333333 Wh | 4.3961 |
| 20 Btu | 5.8614444444444 Wh | 5.8614 |
| 25 Btu | 7.3268055555556 Wh | 7.3268 |
| 30 Btu | 8.7921666666667 Wh | 8.7922 |
| 40 Btu | 11.722888888889 Wh | 11.7229 |
| 50 Btu | 14.653611111111 Wh | 14.6536 |
| 75 Btu | 21.980416666667 Wh | 21.9804 |
| 100 Btu | 29.307222222222 Wh | 29.3072 |
| 200 Btu | 58.614444444444 Wh | 58.6144 |
| 250 Btu | 73.268055555556 Wh | 73.2681 |
| 500 Btu | 146.53611111111 Wh | 146.5361 |
| 750 Btu | 219.80416666667 Wh | 219.8042 |
| 1000 Btu | 293.07222222222 Wh | 293.0722 |
| 2500 Btu | 732.68055555556 Wh | 732.6806 |
| 5000 Btu | 1465.3611111111 Wh | 1465.3611 |
| 10000 Btu | 2930.7222222222 Wh | 2930.7222 |
Watt hour → British thermal unit Table
| Wh | Btu | Rounded |
|---|---|---|
| 1 Wh | 3.412128220196 Btu | 3.4121 |
| 2 Wh | 6.824256440392 Btu | 6.8243 |
| 3 Wh | 10.236384660588 Btu | 10.2364 |
| 4 Wh | 13.648512880784 Btu | 13.6485 |
| 5 Wh | 17.06064110098 Btu | 17.0606 |
| 10 Wh | 34.12128220196 Btu | 34.1213 |
| 12 Wh | 40.945538642352 Btu | 40.9455 |
| 15 Wh | 51.18192330294 Btu | 51.1819 |
| 20 Wh | 68.24256440392 Btu | 68.2426 |
| 25 Wh | 85.3032055049 Btu | 85.3032 |
| 30 Wh | 102.36384660588 Btu | 102.3638 |
| 40 Wh | 136.48512880784 Btu | 136.4851 |
| 50 Wh | 170.6064110098 Btu | 170.6064 |
| 75 Wh | 255.9096165147 Btu | 255.9096 |
| 100 Wh | 341.2128220196 Btu | 341.2128 |
| 200 Wh | 682.4256440392 Btu | 682.4256 |
| 250 Wh | 853.032055049 Btu | 853.0321 |
| 500 Wh | 1706.064110098 Btu | 1706.0641 |
| 750 Wh | 2559.096165147 Btu | 2559.0962 |
| 1000 Wh | 3412.128220196 Btu | 3412.1282 |
| 2500 Wh | 8530.32055049 Btu | 8530.3206 |
| 5000 Wh | 17060.64110098 Btu | 17060.6411 |
| 10000 Wh | 34121.28220196 Btu | 34121.2822 |
Watt hour → British thermal unit
The reverse value is 1 Wh = 3.412128220196 Btu.