Convert Ohm Square Millimetres per Metre to Nanoohm Metres

Formula

nΩ·m = Ω·mm²/m × 1000

Derivation from SI units:

• 1 Ω·mm²/m = 10⁻⁶ Ω·m (resistance in Ω of a 1 m wire with 1 mm² cross-section)
• 1 nΩ·m = 10⁻⁹ Ω·m = 0.1 µΩ·cm
• 1 Ω·mm²/m = 0.000001 Ω·m ÷ 1 × 10⁻⁹ Ω·m per nΩ·m = 1000 nΩ·m

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

Worked examples

1. A reading of 0.0282 Ω·mm²/m converts to 28.2 nΩ·m.
   0.0282 Ω·mm²/m × 1000 = 28.2 nΩ·m
2. A value of 0.72 Ω·mm²/m is 720 nΩ·m.
   0.72 Ω·mm²/m × 1000 = 720 nΩ·m

Where it's used

Ohm Square Millimetres per Metre are used for cable and wire resistance (R = ρ × length ÷ mm²), while nanoohm metres appear in physics and materials handbooks. Both measure electrical resistivity, so the conversion is a fixed factor.

Ohm Square Millimetre per Metre 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.