Convert Wh to BTU
watt hours to British thermal units. Enter a value to convert, or use the Wh to BTU chart further down the page.
1 watt hour equals 3.41214 British thermal units. Going the other way, 1 British thermal unit = 0.293071 watt hours.
How to convert Wh to BTU
To convert watt hours to British thermal units, multiply the watt hour value by 3.412141633. You can also divide by 0.2930710702 to get the same answer.
BTU = Wh × 3.412141633
Worked example
Convert 15 Wh to British thermal units:
15 Wh = 51.1821 BTU
Wh to BTU conversion chart
Use this Wh to BTU table for quick reference without typing anything.
| watt hours (Wh) | British thermal units (BTU) |
|---|---|
| 0.01 Wh | 0.0341214 BTU |
| 0.1 Wh | 0.341214 BTU |
| 1 Wh | 3.41214 BTU |
| 2 Wh | 6.82428 BTU |
| 3 Wh | 10.2364 BTU |
| 5 Wh | 17.0607 BTU |
| 10 Wh | 34.1214 BTU |
| 20 Wh | 68.2428 BTU |
| 50 Wh | 170.607 BTU |
| 100 Wh | 341.214 BTU |
| 1,000 Wh | 3,412.14 BTU |
What is a watt hour?
A watt hour is exactly 3,600 joules — the energy used by a one-watt device in one hour. Battery capacity is rated in watt hours.
What is a British thermal unit?
The BTU is the energy needed to raise one pound of water by one degree Fahrenheit — about 1,055 joules. It rates heating and air-conditioning equipment in the US.
Frequently asked questions
How many BTU are in a watt hour?
1 Wh equals 3.41214 BTU. Going the other way, 1 BTU is 0.293071 Wh.
How do you convert Wh to BTU?
To convert watt hours to British thermal units, multiply the watt hour value by 3.412141633. You can also divide by 0.2930710702 to get the same answer.
What is 10 Wh in BTU?
10 Wh equals 34.1214 BTU. The conversion chart on this page lists the other values people look up most often.
Related energy conversions
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