Convert Milliwatts to Mechanical Horsepower
Convert Milliwatts (mW) to Mechanical Horsepower (hp) instantly and accurately.
Conversion Formula
hp = mW × 1.341022090e-6
About Milliwatts
A milliwatt (mW) is 10⁻³ W - the power scale of consumer wireless communications. Wi-Fi access points transmit at 100 mW (20 dBm); mobile phones peak at up to 1,000 mW. A laser pointer emits 1-5 mW; an LED indicator 10 mW; Bluetooth Classic peaks at 100 mW. Standby power implications: 1 mW × 10⁹ devices × 1 year = 8,760 MWh - enough to power a small town, underscoring why milliwatt standby matters at scale. 1 mW = 10⁻³ W.
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.
Quick Reference Table
| Milliwatts (mW) | Mechanical Horsepower (hp) |
|---|---|
| 1 mW | 1.341 × 10-6 hp |
| 2 mW | 2.682 × 10-6 hp |
| 5 mW | 6.705 × 10-6 hp |
| 10 mW | 1.341 × 10-5 hp |
| 25 mW | 3.353 × 10-5 hp |
| 50 mW | 6.705 × 10-5 hp |
| 100 mW | 0.000134102 hp |