Convert Ohm-metres to Ohm circular mil per foot
Convert Ohm-metres (Ω·m) to Ohm circular mil per foot (Ω·cmil/ft) instantly and accurately.
Conversion Formula
Ω·cmil/ft = Ω·m × 601530493.6
About Ohm-metres
The ohm-metre (Ω·m) is the SI coherent unit of electrical resistivity, equal to 1 V·m/A = 1 kg·m³·A⁻²·s⁻³. Seawater is ≈0.2 Ω·m; deionised water is ~18 MΩ·cm = 180 kΩ·m; silicon carbide ≈0.1-10 Ω·m; IEC 60287 specifies cable insulation resistivity in Ω·m. 1 Ω·m = 10² Ω·cm = 10⁶ µΩ·m.
About Ohm circular mil per foot
The ohm circular mil per foot (Ω·cmil/ft) is the US customary resistivity unit for wires and cables, equal to π×6.4516×10⁻¹⁰/(4×0.3048) Ω·m ≈ 1.66243×10⁻⁹ Ω·m. Copper has resistivity ≈1.012 Ω·cmil/ft; wire tables in NFPA 70 (NEC) and ASTM B3 list conductor resistivity in this unit. 1 Ω·cmil/ft ≈ 1.66243 nΩ·m.
Quick Reference Table
| Ohm-metres (Ω·m) | Ohm circular mil per foot (Ω·cmil/ft) |
|---|---|
| 1 Ω·m | 601530000 Ω·cmil/ft |
| 2 Ω·m | 1.203 × 109 Ω·cmil/ft |
| 5 Ω·m | 3.008 × 109 Ω·cmil/ft |
| 10 Ω·m | 6.015 × 109 Ω·cmil/ft |
| 25 Ω·m | 1.504 × 1010 Ω·cmil/ft |
| 50 Ω·m | 3.008 × 1010 Ω·cmil/ft |
| 100 Ω·m | 6.015 × 1010 Ω·cmil/ft |