Convert Electrical Horsepower to Nanowatts
Convert Electrical Horsepower (hp(E)) to Nanowatts (nW) instantly and accurately.
Conversion Formula
nW = hp(E) × 746000000000
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 Nanowatts
A nanowatt (nW) is 10⁻⁹ W - the power scale of ultra-low-power embedded systems. Cardiac pacemakers deliver sensing pulses at nanowatt levels to preserve 7-10 year battery life. RFID tags harvest ~10-200 nW from reader fields. Solar cells in wristwatches and calculators operate on ambient indoor light yielding tens of nanowatts. A standard AA cell (13,500 J) discharged at 1 nW would last over 400 years. Neuromorphic chips target 10-100 nW per neuron-equivalent circuit. 1 nW = 10⁻⁹ W.
Quick Reference Table
| Electrical Horsepower (hp(E)) | Nanowatts (nW) |
|---|---|
| 1 hp(E) | 7.46 × 1011 nW |
| 2 hp(E) | 1.492 × 1012 nW |
| 5 hp(E) | 3.73 × 1012 nW |
| 10 hp(E) | 7.46 × 1012 nW |
| 25 hp(E) | 1.865 × 1013 nW |
| 50 hp(E) | 3.73 × 1013 nW |
| 100 hp(E) | 7.46 × 1013 nW |