Convert BTU to Wh
British thermal units to watt hours. Enter a value to convert, or use the BTU to Wh chart further down the page.
1 British thermal unit equals 0.293071 watt hours. Going the other way, 1 watt hour = 3.41214 British thermal units.
How to convert BTU to Wh
To convert British thermal units to watt hours, multiply the British thermal unit value by 0.2930710702. You can also divide by 3.412141633 to get the same answer.
Wh = BTU × 0.2930710702
Worked example
Convert 15 BTU to watt hours:
15 BTU = 4.39607 Wh
BTU to Wh conversion chart
Use this BTU to Wh table for quick reference without typing anything.
| British thermal units (BTU) | watt hours (Wh) |
|---|---|
| 0.01 BTU | 0.00293071 Wh |
| 0.1 BTU | 0.0293071 Wh |
| 1 BTU | 0.293071 Wh |
| 2 BTU | 0.586142 Wh |
| 3 BTU | 0.879213 Wh |
| 5 BTU | 1.46536 Wh |
| 10 BTU | 2.93071 Wh |
| 20 BTU | 5.86142 Wh |
| 50 BTU | 14.6536 Wh |
| 100 BTU | 29.3071 Wh |
| 1,000 BTU | 293.071 Wh |
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.
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.
Frequently asked questions
How many Wh are in a British thermal unit?
1 BTU equals 0.293071 Wh. Going the other way, 1 Wh is 3.41214 BTU.
How do you convert BTU to Wh?
To convert British thermal units to watt hours, multiply the British thermal unit value by 0.2930710702. You can also divide by 3.412141633 to get the same answer.
What is 10 BTU in Wh?
10 BTU equals 2.93071 Wh. The conversion chart on this page lists the other values people look up most often.
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