Watt-hours (W·h) to British thermal units (BTU) Conversion
Watt-hours
The watt-hour (W·h) is a unit of energy equal to exactly 3,600 joules, defined as the energy consumed by a one-watt device operating for one hour. It is used in electrical engineering and consumer electronics for expressing battery capacities: a smartphone battery typically holds 10–20 Wh. In aviation, aircraft battery capacities are specified in watt-hours for international transport regulations (lithium batteries above 100 Wh face restrictions).
British thermal units
The British thermal unit (BTU) is a unit of energy approximately equal to 1,055.06 joules, defined as the energy required to raise the temperature of one pound of water by one degree Fahrenheit. It remains the standard unit for heating and cooling capacity in HVAC systems in the United States: air conditioners and furnaces are rated in BTU/hour. A typical residential air conditioner is rated at 5,000–24,000 BTU/h. One BTU equals approximately 0.000293 kWh.
| Watt-hours (W·h) | British thermal units (BTU) |
|---|---|
| 0.1 W·h | 0.3412 BTU |
| 1 W·h | 3.4121 BTU |
| 2 W·h | 6.8243 BTU |
| 3 W·h | 10.2364 BTU |
| 5 W·h | 17.0607 BTU |
| 10 W·h | 34.1214 BTU |
| 20 W·h | 68.2428 BTU |
| 30 W·h | 102.3642 BTU |
| 50 W·h | 170.6071 BTU |
| 100 W·h | 341.2142 BTU |
| 1000 W·h | 3,412.1416 BTU |
Frequently Asked Questions (FAQ)
How many British thermal units are in 1 watt-hours?
1 watt-hours (W·h) is exactly 3.4121 British thermal units (BTU).
How do I convert watt-hours to British thermal units?
Multiply the value in watt-hours by 3.4121 to get the result in British thermal units. Or use the converter above — type any number and see the result instantly.