Convert watt hours 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
Common values, rounded for reading.
| Watt hours (Wh) | BTU (BTU) |
|---|---|
| 1 | 3.4121 |
| 2 | 6.8243 |
| 3 | 10.2364 |
| 4 | 13.6486 |
| 5 | 17.0607 |
| 6 | 20.4728 |
| 7 | 23.885 |
| 8 | 27.2971 |
| 9 | 30.7093 |
| 10 | 34.1214 |
| 15 | 51.1821 |
| 20 | 68.2428 |
| 25 | 85.3035 |
| 30 | 102.36 |
| 40 | 136.49 |
| 50 | 170.61 |
| 75 | 255.91 |
| 100 | 341.21 |
| 250 | 853.04 |
| 500 | 1,706.07 |
| 1,000 | 3,412.14 |
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.