Convert BTU per Second to Mechanical Horsepower
Convert BTU per Second (BTU/s) to Mechanical Horsepower (hp) instantly and accurately.
Conversion Formula
hp = BTU/s × 1.414853204
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 Mechanical Horsepower
The mechanical horsepower (hp) is exactly 550 ft·lbf/s ≈ 745.7 W - defined by James Watt by timing mine horses to set a comparable steam engine rating. A typical compact car produces 100-150 hp (75-112 kW); a sports car 300-600 hp; an F1 car ~1,000 hp (745 kW). SAE net horsepower is measured at the flywheel with all accessories fitted. Marine diesel engines, aircraft piston engines, and lawn equipment are still rated in hp. 1 hp = 550 ft·lbf/s = 745.6998715822704 W.
Quick Reference Table
| BTU per Second (BTU/s) | Mechanical Horsepower (hp) |
|---|---|
| 1 BTU/s | 1.41485 hp |
| 2 BTU/s | 2.82971 hp |
| 5 BTU/s | 7.07427 hp |
| 10 BTU/s | 14.1485 hp |
| 25 BTU/s | 35.3713 hp |
| 50 BTU/s | 70.7427 hp |
| 100 BTU/s | 141.485 hp |