How many watt-hours are in 1 British thermal unit?

1 British thermal unit equals 0.293071 Wh.

How do I convert watt-hours back to British thermal units?

Use the reverse converter: 1 watt-hour equals 3.41214 BTU.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert British thermal units to watt-hours, multiply the value by 0.29307107.

Wh = BTU × 0.29307107

90 BTU × 0.29307107 = 26.38 Wh

British Thermal Unit (BTU): Used for heating, cooling and gas in the US. The IT BTU is about 1,055.056 joules.
Watt-hour (Wh): Used for battery capacity. Equal to 3,600 joules.

How do I convert British thermal units to watt-hours?: To convert British thermal units to watt-hours, multiply the value by 0.29307107.
How many watt-hours are in 1 British thermal unit?: 1 British thermal unit equals 0.293071 Wh.
How many watt-hours are in 10 British thermal units?: 10 BTU equals 2.93071 Wh.
How do I convert watt-hours back to British thermal units?: Use the reverse converter: 1 watt-hour equals 3.41214 BTU.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.