Convert BTU per Second to Electrical Horsepower
Convert BTU per Second (BTU/s) to Electrical Horsepower (hp(E)) instantly and accurately.
Conversion Formula
hp(E) = BTU/s × 1.414283985
About BTU per Second
One BTU per second (BTU/s) ≈ 1,055 W - close to 1 kW but slightly larger. Used when heat rates are so high that per-hour or per-minute numbers become unwieldy. In fire protection engineering, large house fires peak at 500-2,000 BTU/s; industrial fires at millions of BTU/s. Blast characterisation for petrochemical safety and large industrial heat exchangers with duties of millions of BTU/h are conveniently expressed in BTU/s. Since 1 BTU/s ≈ 1.055 kW, conversion to SI is straightforward. 1 BTU/s = 1,055.056 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 Second (BTU/s) | Electrical Horsepower (hp(E)) |
|---|---|
| 1 BTU/s | 1.41428 hp(E) |
| 2 BTU/s | 2.82857 hp(E) |
| 5 BTU/s | 7.07142 hp(E) |
| 10 BTU/s | 14.1428 hp(E) |
| 25 BTU/s | 35.3571 hp(E) |
| 50 BTU/s | 70.7142 hp(E) |
| 100 BTU/s | 141.428 hp(E) |