Convert BTU per Hour to Electrical Horsepower
Convert BTU per Hour (BTU/h) to Electrical Horsepower (hp(E)) instantly and accurately.
Conversion Formula
hp(E) = BTU/h × 0.0003928566624
About BTU per Hour
One BTU per hour (BTU/h) ≈ 0.2931 W - the dominant HVAC capacity unit in the US and Canada. Room air conditioners are universally rated in BTU/h: 12,000 BTU/h = 1 ton of refrigeration = 3,517 W. Home furnaces range from 40,000-150,000 BTU/h. Office building cooling demand is calculated in BTU/h per ft². Engineers convert: BTU/h × 0.2931 = W; or W × 3.412 = BTU/h. 1 BTU/h = 0.29307 W.
About Electrical Horsepower
The electrical horsepower (hp(E)) is defined as exactly 746 W - the US NEMA rounding used on electric motor nameplates. It differs from mechanical hp (745.7 W) by only 0.04%. Every NEMA-rated motor in the US carries a horsepower nameplate: a '5 hp motor' delivers 5 × 746 = 3,730 W. NEC motor branch-circuit sizing tables, overload relay selection, and starter ratings are all based on hp(E). Despite global kW adoption, US industrial motor infrastructure remains standardised in electrical horsepower. 1 hp(E) = 746 W.
Quick Reference Table
| BTU per Hour (BTU/h) | Electrical Horsepower (hp(E)) |
|---|---|
| 1 BTU/h | 0.000392857 hp(E) |
| 2 BTU/h | 0.000785713 hp(E) |
| 5 BTU/h | 0.00196428 hp(E) |
| 10 BTU/h | 0.00392857 hp(E) |
| 25 BTU/h | 0.00982142 hp(E) |
| 50 BTU/h | 0.0196428 hp(E) |
| 100 BTU/h | 0.0392857 hp(E) |