Convert Ohms to Milliohms
Convert Ohms (Ω) to Milliohms (mΩ) instantly and accurately.
Conversion Formula
mΩ = Ω × 1000
About Ohms
The ohm (Ω) is the SI derived unit of electrical resistance, equal to 1 volt per ampere (1 V/A = 1 kg·m²·A⁻²·s⁻³), named after Georg Simon Ohm who published V = IR in 1827. Common benchmarks: a standard earphone is 32 Ω, a coaxial cable has 50 or 75 Ω characteristic impedance, and a typical carbon-film resistor spans 1 Ω to 10 MΩ. The ohm is realised internationally via the quantum Hall resistance standard Rₖ = h/e² ≈ 25 812.807 Ω.
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
| Ohms (Ω) | Milliohms (mΩ) |
|---|---|
| 1 Ω | 1000 mΩ |
| 2 Ω | 2000 mΩ |
| 5 Ω | 5000 mΩ |
| 10 Ω | 10000 mΩ |
| 25 Ω | 25000 mΩ |
| 50 Ω | 50000 mΩ |
| 100 Ω | 100000 mΩ |