1 watt hour to BTU
1 Wh = 3.412142 BTU. Change the amount below, or read the formula and the reference table further down.
1 watt hour equals
BTU
1 Wh = 3.412142 BTU
The formula
Watt hours and BTU both measure energy from the same zero, so a single multiplier does the job.
BTU = Wh × 3.41214163
Going the other way? Convert BTU to watt hours.
Watt hours to BTU table
Values either side of 1 Wh.
| Watt hours (Wh) | BTU (BTU) |
|---|---|
| -4 | -13.6486 |
| -3.5 | -11.9425 |
| -3 | -10.2364 |
| -2.5 | -8.5304 |
| -2 | -6.8243 |
| -1.5 | -5.1182 |
| -1 | -3.4121 |
| -0.5 | -1.7061 |
| 0 | 0 |
| 0.5 | 1.7061 |
| 1 | 3.4121 |
| 1.5 | 5.1182 |
| 2 | 6.8243 |
| 2.5 | 8.5304 |
| 3 | 10.2364 |
| 3.5 | 11.9425 |
| 4 | 13.6486 |
| 4.5 | 15.3546 |
| 5 | 17.0607 |
| 5.5 | 18.7668 |
| 6 | 20.4728 |
Questions people ask
- How many BTU are in a watt hour?
- One watt hour equals 3.41214163 BTU.
- How do I convert watt hours to BTU by hand?
- Multiply the number of watt hours by 3.41214163. For a rough check, 3.4 is close enough for most everyday use.
- What is 1 watt hour in BTU?
- 1 watt hour is 3.412142 BTU.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.