Convert Mechanical Horsepower to Milliwatts
Convert Mechanical Horsepower (hp) to Milliwatts (mW) instantly and accurately.
Conversion Formula
mW = hp × 745699.8716
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 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.
Quick Reference Table
| Mechanical Horsepower (hp) | Milliwatts (mW) |
|---|---|
| 1 hp | 745700 mW |
| 2 hp | 1491400 mW |
| 5 hp | 3728500 mW |
| 10 hp | 7457000 mW |
| 25 hp | 18642500 mW |
| 50 hp | 37285000 mW |
| 100 hp | 74570000 mW |