Watt Hours to BTU Converter
Enter watt-hours or BTU for instant bidirectional conversion. 1 Wh = 3.41214 BTU (IT). Includes a reference table and HVAC sizing context.
Wh ↔ BTU Converter
1 Wh = 3.41214 BTU (IT)
Quick Reference Table
Common watt-hour values in BTU (1 Wh = 3.41214 BTU)
| Watt-Hours (Wh) | BTU (IT) | Context |
|---|
BTU/hr (power) reference for HVAC
HVAC equipment is rated in BTU/hr (energy per hour), not BTU alone. 1 watt = 3.41214 BTU/hr. To size equipment: a 1,000 W heater outputs 3,412 BTU/hr; a 12,000 BTU/hr air conditioner draws about 3,517 W. If you have a battery bank of 10,000 Wh, it stores 34,121 BTU of energy — enough to run a 12,000 BTU/hr AC unit for roughly 2.8 hours at full load (ignoring efficiency losses).
Summary
Enter watt-hours or BTU for instant bidirectional conversion. 1 Wh = 3.41214 BTU (IT). Includes a reference table and HVAC sizing context.
How it works
- Enter a value in the Wh field to see the BTU equivalent instantly.
- Enter a value in the BTU field to reverse-convert back to watt-hours.
- All fields update in real time — no button click needed.
- Click any row in the reference table to load that value into the converter.
- The formula used: BTU = Wh × 3.41214; Wh = BTU ÷ 3.41214.
Use cases
- Size HVAC systems by comparing heat pump output in BTU against battery storage in Wh.
- Convert generator or UPS energy ratings from watt-hours to BTU for US building specs.
- Translate solar panel daily output (Wh) to BTU for comparison with gas furnace ratings.
- Verify air conditioner energy consumption figures when specs mix BTU and Wh units.
- Compare electric heater and natural-gas appliance ratings in a common energy unit.