Convert Ohm circular mil per foot to Gigaohm-metres
Convert Ohm circular mil per foot (Ω·cmil/ft) to Gigaohm-metres (GΩ·m) instantly and accurately.
Conversion Formula
GΩ·m = Ω·cmil/ft × 1.662426113e-18
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 Gigaohm-metres
The gigaohm-metre (GΩ·m) equals 10⁹ Ω·m, the scale for excellent insulating materials and ultra-pure liquids. Fused silica (quartz glass) has resistivity ≈ 10⁴-10⁵ GΩ·m at room temperature; ultra-pure deionised water is ≈18 MΩ·cm = 180 kΩ·m; synthetic sapphire is ≈1-10⁴ GΩ·m depending on temperature. 1 GΩ·m = 10⁹ Ω·m = 10³ MΩ·m.
Quick Reference Table
| Ohm circular mil per foot (Ω·cmil/ft) | Gigaohm-metres (GΩ·m) |
|---|---|
| 1 Ω·cmil/ft | 1.662 × 10-18 GΩ·m |
| 2 Ω·cmil/ft | 3.325 × 10-18 GΩ·m |
| 5 Ω·cmil/ft | 8.312 × 10-18 GΩ·m |
| 10 Ω·cmil/ft | 1.662 × 10-17 GΩ·m |
| 25 Ω·cmil/ft | 4.156 × 10-17 GΩ·m |
| 50 Ω·cmil/ft | 8.312 × 10-17 GΩ·m |
| 100 Ω·cmil/ft | 1.662 × 10-16 GΩ·m |