Convert Mechanical Horsepower to Ergs per Second
Convert Mechanical Horsepower (hp) to Ergs per Second (erg/s) instantly and accurately.
Conversion Formula
erg/s = hp × 7456998716
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.
About Ergs per Second
An erg per second (erg/s) is the CGS unit of power - exactly 10⁻⁷ W. Despite SI adoption, erg/s persists in astrophysics: the Sun's total luminosity is 3.828 × 10³³ erg/s; a peak supernova radiates ~10⁴³ erg/s - more power than the Sun emits over its 10-billion-year lifetime. X-ray binaries, active galactic nuclei, and neutron star accretion rates are catalogued in erg/s across decades of archival literature. 1 erg/s = 10⁻⁷ W.
Quick Reference Table
| Mechanical Horsepower (hp) | Ergs per Second (erg/s) |
|---|---|
| 1 hp | 7.457 × 109 erg/s |
| 2 hp | 1.491 × 1010 erg/s |
| 5 hp | 3.728 × 1010 erg/s |
| 10 hp | 7.457 × 1010 erg/s |
| 25 hp | 1.864 × 1011 erg/s |
| 50 hp | 3.728 × 1011 erg/s |
| 100 hp | 7.457 × 1011 erg/s |