Convert Megaohm Centimetres to Ω·mm²/m

Formula

Ω·mm²/m = MΩ·cm × 10000000000

Derivation from SI units:

• 1 MΩ·cm = 10⁶ Ω·cm = 10⁴ Ω·m
• 1 Ω·mm²/m = 10⁻⁶ Ω·m (resistance in Ω of a 1 m wire with 1 mm² cross-section)
• 1 MΩ·cm = 10000 Ω·m ÷ 0.000001 Ω·m per Ω·mm²/m = 10000000000 Ω·mm²/m

Both units are defined exactly, so the factor is exact. Megaohm Centimetre definition: megaohm centimetre; Ohm Square Millimetre per Metre definition: ohm square millimetre per metre.

Worked examples

1. A reading of 2 MΩ·cm converts to 20000000000 Ω·mm²/m.
   2 MΩ·cm × 10000000000 = 20000000000 Ω·mm²/m
2. A value of 15 MΩ·cm is 150000000000 Ω·mm²/m.
   15 MΩ·cm × 10000000000 = 150000000000 Ω·mm²/m

Where it's used

Megaohm Centimetres are used for ultrapure and deionised water (18.2 MΩ·cm), while ohm square millimetres per metre appear in cable and wire resistance (R = ρ × length ÷ mm²). Both measure electrical resistivity, so the conversion is a fixed factor.

Megaohm Centimetre to other electrical resistivity units

Frequently asked questions

Sources

• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures .

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.