Convert Electrical Horsepower to Ergs per Second
Convert Electrical Horsepower (hp(E)) to Ergs per Second (erg/s) instantly and accurately.
Conversion Formula
erg/s = hp(E) × 7460000000
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 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
| Electrical Horsepower (hp(E)) | Ergs per Second (erg/s) |
|---|---|
| 1 hp(E) | 7.46 × 109 erg/s |
| 2 hp(E) | 1.492 × 1010 erg/s |
| 5 hp(E) | 3.73 × 1010 erg/s |
| 10 hp(E) | 7.46 × 1010 erg/s |
| 25 hp(E) | 1.865 × 1011 erg/s |
| 50 hp(E) | 3.73 × 1011 erg/s |
| 100 hp(E) | 7.46 × 1011 erg/s |