Convert Microohms to Milliohms
Convert Microohms (µΩ) to Milliohms (mΩ) instantly and accurately.
Conversion Formula
mΩ = µΩ × 0.001
About Microohms
The microohm (µΩ) equals 10⁻⁶ Ω, the practical scale for contact resistance testing, bus-bar joints, and circuit-breaker contacts. A well-made bolted bus-bar connection has contact resistance below 50 µΩ; a 25 mm² copper conductor has resistance of about 0.7 µΩ/mm; IEC 60947 specifies acceptance limits for switchgear contacts in microohms. 1 µΩ = 10⁻³ mΩ = 10³ nΩ.
About Milliohms
The milliohm (mΩ) equals 10⁻³ Ω, the scale of precision current-sensing shunts, relay contacts, and PCB trace resistance. Current-sensing shunts of 1-10 mΩ allow high-current measurement by detecting the millivolt drop they produce; electrical continuity standards flag connections above a few milliohms; DC winding resistance of large motor coils is typically 0.1-10 mΩ. 1 mΩ = 10⁻³ Ω = 10³ µΩ.
Quick Reference Table
| Microohms (µΩ) | Milliohms (mΩ) |
|---|---|
| 1 µΩ | 0.001 mΩ |
| 2 µΩ | 0.002 mΩ |
| 5 µΩ | 0.005 mΩ |
| 10 µΩ | 0.01 mΩ |
| 25 µΩ | 0.025 mΩ |
| 50 µΩ | 0.05 mΩ |
| 100 µΩ | 0.1 mΩ |