Resistance Converter

Milliohms to Microohms Converter

Convert any milliohm value to microohms in real time. 1 mΩ = 1,000 μΩ. This dedicated resistance converter is designed for power electronics, contact resistance testing, and precision measurement applications.

mΩ
×1,000
μΩ
1 mΩ = 1,000 μΩ

How the Milliohm to Microohm Converter Works

The milliohm to microohm converter multiplies any milliohm (mΩ) input by 1,000 to produce the microohm (μΩ) output. A milliohm is one thousandth of an ohm (10⁻³ Ω) and a microohm is one millionth of an ohm (10⁻⁶ Ω). The conversion factor is a fixed 1,000.

Sub-ohm resistance measurements are critical in power distribution, battery pack design, connector qualification, circuit-breaker contact testing, and superconductor characterization. A typical copper bus bar has resistance in the range of 10–500 μΩ, while high-current connectors are specified below 1 mΩ.

This converter applies the standard SI prefix relationship. Enter a milliohm value and the microohm equivalent appears instantly. Both fields are bidirectional — type in either to convert.

Milliohm to Microohm Formula

μΩ = mΩ × 1,000

The formula is: μΩ = mΩ × 1,000. Since milli = 10⁻³ and micro = 10⁻⁶, the ratio is 10³ = 1,000.

Example: A 0.5 mΩ shunt resistor = 500 μΩ. A 2 mΩ connector resistance = 2,000 μΩ. A 0.01 mΩ superconductor joint = 10 μΩ.

Milliohm to Microohm Conversion Chart

Milliohms Microohms Example Real-World Use

The mΩ to μΩ chart below covers 12 common resistance values used in power electronics, contact testing, and precision metrology. Click any row to load it into the calculator.

Frequently Asked Questions

How many microohms are in 1 milliohm?

There are exactly 1,000 microohms (μΩ) in 1 milliohm (mΩ). The SI prefix gap between milli and micro is always three orders of magnitude (10³ = 1,000).

Why measure resistance in microohms?

Microohm measurements are essential for testing low-resistance connections like bus bars, battery terminals, relay contacts, and superconductor junctions. Even small resistance increases can cause significant power loss in high-current circuits.

What instrument measures microohm resistance?

A micro-ohmmeter (also called a DLRO — digital low-resistance ohmmeter) uses four-wire (Kelvin) measurement to accurately measure resistances from 0.1 μΩ to several ohms, eliminating lead resistance errors.

How do I convert microohms back to milliohms?

Divide the microohm value by 1,000. For example, 5,000 μΩ ÷ 1,000 = 5 mΩ. This converter works in both directions.

Is contact resistance measured in milliohms or microohms?

Both, depending on the application. High-current power contacts are often specified in microohms (e.g., < 100 μΩ), while signal-level connectors typically use milliohms (e.g., < 20 mΩ).