Convert Electrical Horsepower to BTU per Minute
Convert Electrical Horsepower (hp(E)) to BTU per Minute (BTU/min) instantly and accurately.
Conversion Formula
BTU/min = hp(E) × 42.42429431
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.
About BTU per Minute
One BTU per minute (BTU/min) ≈ 17.58 W. Fire engineering uses BTU/min for heat release rate (HRR): a burning sofa releases 500-5,000 BTU/min; a flashover room fire 50,000-500,000 BTU/min. US commercial gas burners are rated 500-2,000 BTU/min. NFPA fire suppression standards use BTU/min to match sprinkler flow to HRR. Industrial furnace heating cycles also use this unit. 1 BTU/min = 17.584 W.
Quick Reference Table
| Electrical Horsepower (hp(E)) | BTU per Minute (BTU/min) |
|---|---|
| 1 hp(E) | 42.4243 BTU/min |
| 2 hp(E) | 84.8486 BTU/min |
| 5 hp(E) | 212.121 BTU/min |
| 10 hp(E) | 424.243 BTU/min |
| 25 hp(E) | 1060.61 BTU/min |
| 50 hp(E) | 2121.21 BTU/min |
| 100 hp(E) | 4242.43 BTU/min |