MEASUREMENT & METHODS

Milliohms (mΩ): resistance unit guide

Understand milliohms (mΩ) for resistance. Check base-unit equivalents, examples, comparison tables and source conventions.

What is being measured?

Electrical resistance relates voltage and current under the stated circuit model. It is distinct from resistivity, which includes material and geometry considerations.

Prefixes are SI decimal powers. Convert within this quantity only.

Meaning of mΩ

Milliohms uses the symbol mΩ in this library and measures electrical resistance. Under the stated reference convention, 1 mΩ = approximately 0.001 Ω. This equivalence changes how a known value is written. It does not increase measurement accuracy or establish whether a measurement is appropriate to a real application.

Conversion method

Multiply the value by the source factor (0.001), then divide by the target factor (1). The factor ratio expresses the same electrical resistance measurement in the other unit.

Worked example

For a known value of 10 mΩ, the reference conversion gives 0.01 Ω. Converting that result back gives approximately 10 mΩ. This reverse check helps catch a reversed factor, but matching round-trip arithmetic alone does not independently verify a source definition.

Common reference values

Input (mΩ)Reference equivalent (Ω)
10.001
50.005
100.01
250.025
500.05
1000.1

Compare one mΩ with other units

Target unitEquivalent of 1 mΩDefinition guide
Ohms (Ω)0.001Read definition
Microohms (µΩ)1000Read definition
Kiloohms (kΩ)0.000001Read definition
Megaohms (MΩ)1e-9Read definition
Gigaohms (GΩ)1e-12Read definition
Teraohms (TΩ)1e-15Read definition

Precision and common mistakes

  • Keep the source and target quantity consistent. A matching symbol is not enough to establish a compatible definition.
  • Record the original measurement precision. Showing twelve significant digits in a table does not make a rounded input more precise.
  • Check symbol capitalization, prefixes and any regional convention in the source. Use the displayed unit definition rather than a similarly named unit.
  • Factors involving repeating fractions or π use finite numerical precision. Round the final answer to the precision justified by your input.

Use a working converter

Source and verification scope

Examples and tables are computed from the versioned unit definitions used by the linked converters. The source access dates appear below. Computandum is independent of the cited organizations; a citation does not mean that a publisher endorses this page or an actual project.

Sources

Read the calculation and sourcing methodology →