Convert Nanowatts to Electrical Horsepower
Convert Nanowatts (nW) to Electrical Horsepower (hp(E)) instantly and accurately.
Conversion Formula
hp(E) = nW × 1.340482574e-12
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.
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.
Quick Reference Table
| Nanowatts (nW) | Electrical Horsepower (hp(E)) |
|---|---|
| 1 nW | 1.34 × 10-12 hp(E) |
| 2 nW | 2.681 × 10-12 hp(E) |
| 5 nW | 6.702 × 10-12 hp(E) |
| 10 nW | 1.34 × 10-11 hp(E) |
| 25 nW | 3.351 × 10-11 hp(E) |
| 50 nW | 6.702 × 10-11 hp(E) |
| 100 nW | 1.34 × 10-10 hp(E) |