Convert Electrical Horsepower to Exawatts
Convert Electrical Horsepower (hp(E)) to Exawatts (EW) instantly and accurately.
Conversion Formula
EW = hp(E) × 7.460000000e-16
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 Exawatts
An exawatt (EW) is 10¹⁸ W. The Sun's total luminosity is 3.828 × 10²⁶ W = 3.828 × 10⁸ EW. Earth intercepts ~0.174 EW of solar power. Gamma-ray burst peak luminosities reach 10⁶-10¹ EW, making them the most powerful transients in the universe. Soft gamma-repeater (magnetar) giant flares briefly reach ~10⁵ EW. Proposed multi-exawatt laser projects (IZEST initiative) aim to compress kilojoules into attosecond pulses for QED vacuum physics. Global human civilisation consumes ~1.8 × 10⁻² EW (18 TW). 1 EW = 10¹⁸ W.
Quick Reference Table
| Electrical Horsepower (hp(E)) | Exawatts (EW) |
|---|---|
| 1 hp(E) | 7.46 × 10-16 EW |
| 2 hp(E) | 1.492 × 10-15 EW |
| 5 hp(E) | 3.73 × 10-15 EW |
| 10 hp(E) | 7.46 × 10-15 EW |
| 25 hp(E) | 1.865 × 10-14 EW |
| 50 hp(E) | 3.73 × 10-14 EW |
| 100 hp(E) | 7.46 × 10-14 EW |