Convert BTU to watt hours
1 BTU = 0.29307107 Wh. Change the amount below, or read the formula and the reference table further down.
1 BTU equals
watt hours
1 BTU = 0.29307107 Wh
The formula
BTU and watt hours both measure energy from the same zero, so a single multiplier does the job.
Wh = BTU × 0.2930710702
Going the other way? Convert watt hours to BTU.
BTU to watt hours table
Common values, rounded for reading.
| BTU (BTU) | Watt hours (Wh) |
|---|---|
| 1 | 0.293071 |
| 2 | 0.586142 |
| 3 | 0.879213 |
| 4 | 1.1723 |
| 5 | 1.4654 |
| 6 | 1.7584 |
| 7 | 2.0515 |
| 8 | 2.3446 |
| 9 | 2.6376 |
| 10 | 2.9307 |
| 15 | 4.3961 |
| 20 | 5.8614 |
| 25 | 7.3268 |
| 30 | 8.7921 |
| 40 | 11.7228 |
| 50 | 14.6536 |
| 75 | 21.9803 |
| 100 | 29.3071 |
| 250 | 73.2678 |
| 500 | 146.54 |
| 1,000 | 293.07 |
Questions people ask
- How many watt hours are in a BTU?
- One BTU equals 0.2930710702 watt hours.
- How do I convert BTU to watt hours by hand?
- Multiply the number of BTU by 0.2930710702. For a rough check, 0.293 is close enough for most everyday use.
- What is 1 BTU in watt hours?
- 1 BTU is 0.29307107 watt hours.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.