Convert Ohm circular mil per foot to Ohm-centimetres
Convert Ohm circular mil per foot (Ω·cmil/ft) to Ohm-centimetres (Ω·cm) instantly and accurately.
Conversion Formula
Ω·cm = Ω·cmil/ft × 1.662426113e-7
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.
About Ohm-centimetres
The ohm-centimetre (Ω·cm) equals 0.01 Ω·m, the most widely used unit for semiconductor resistivity in device characterisation. Silicon wafers are specified in Ω·cm: lightly doped n-type Si is 100-10 000 Ω·cm; device-grade p-type Si is 1-50 Ω·cm; germanium is ≈0.46 Ω·cm. ASTM F84 and SEMI standards define silicon resistivity measurements in Ω·cm. 1 Ω·cm = 0.01 Ω·m.
Quick Reference Table
| Ohm circular mil per foot (Ω·cmil/ft) | Ohm-centimetres (Ω·cm) |
|---|---|
| 1 Ω·cmil/ft | 1.662 × 10-7 Ω·cm |
| 2 Ω·cmil/ft | 3.325 × 10-7 Ω·cm |
| 5 Ω·cmil/ft | 8.312 × 10-7 Ω·cm |
| 10 Ω·cmil/ft | 1.662 × 10-6 Ω·cm |
| 25 Ω·cmil/ft | 4.156 × 10-6 Ω·cm |
| 50 Ω·cmil/ft | 8.312 × 10-6 Ω·cm |
| 100 Ω·cmil/ft | 1.662 × 10-5 Ω·cm |