Convert Mechanical Horsepower to Nanowatts
Convert Mechanical Horsepower (hp) to Nanowatts (nW) instantly and accurately.
Conversion Formula
nW = hp × 745699871600
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 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
| Mechanical Horsepower (hp) | Nanowatts (nW) |
|---|---|
| 1 hp | 7.457 × 1011 nW |
| 2 hp | 1.491 × 1012 nW |
| 5 hp | 3.728 × 1012 nW |
| 10 hp | 7.457 × 1012 nW |
| 25 hp | 1.864 × 1013 nW |
| 50 hp | 3.728 × 1013 nW |
| 100 hp | 7.457 × 1013 nW |