How many British thermal units are in 1 watt-hour?

1 watt-hour equals 3.41214 BTU.

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

Use the reverse converter: 1 British thermal unit equals 0.293071 Wh.

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

To convert watt-hours to British thermal units, multiply the value by 3.41214163.

BTU = Wh × 3.41214163

40 Wh × 3.41214163 = 136.49 BTU

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

How do I convert watt-hours to British thermal units?: To convert watt-hours to British thermal units, multiply the value by 3.41214163.
How many British thermal units are in 1 watt-hour?: 1 watt-hour equals 3.41214 BTU.
How many British thermal units are in 10 watt-hours?: 10 Wh equals 34.1214 BTU.
How do I convert British thermal units back to watt-hours?: Use the reverse converter: 1 British thermal unit equals 0.293071 Wh.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.