Convert Ohm Circular Mils per Foot to Ohm Metres
1 ohm circular mil per foot (Ω·cmil/ft) = 1.662426113 × 10⁻⁹ ohm metres (Ω·m). 1 Ω·m = 601530493.6 Ω·cmil/ft. Example: 15 Ω·cmil/ft = 15 × 1.662426113 × 10⁻⁹ = 2.493639169 × 10⁻⁸ Ω·m.
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1 Ω·cmil/ft = 1.662426113e-9 Ω·m
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk ohm circular mil per foot to ohm metre converter to paste a column from Excel.
How to Convert Ohm Circular Mil per Foot to Ohm Metre
- 1 Ω·cmil/ft = 1.662426113 × 10⁻⁹ Ω·m
- 1 Ω·m = 601530493.6 Ω·cmil/ft
- Example: convert 15 Ω·cmil/ft to Ω·m: 15 Ω·cmil/ft = 15 × 1.662426113 × 10⁻⁹ Ω·m = 2.493639169 × 10⁻⁸ Ω·m
Formula
Ω·m = Ω·cmil/ft × 1.662426112525 × 10⁻⁹
or Ω·m = Ω·cmil/ft ÷ 601530493.5757
Derivation from SI units:
- 1 Ω·cmil/ft = (π/4 × (25.4 µm)²) ÷ 0.3048 m Ω ≈ 1.6624 × 10⁻⁹ Ω·m; a circular mil is the area of a 1-mil-diameter circle
- The SI unit of electrical resistivity: resistance (Ω) × cross-section (m²) ÷ length (m)
Both units are defined exactly, so the factor is exact. Ohm Circular Mil per Foot definition: ohm circular mil per foot; Ohm Metre definition: ohm metre.
Worked examples
- A reading of 16.8 Ω·cmil/ft converts to 2.792875869 × 10⁻⁸ Ω·m.
16.8 Ω·cmil/ft × 1.662426113 × 10⁻⁹ = 2.792875869 × 10⁻⁸ Ω·m - A value of 100 Ω·cmil/ft is 1.662426113 × 10⁻⁷ Ω·m.
100 Ω·cmil/ft × 1.662426113 × 10⁻⁹ = 1.662426113 × 10⁻⁷ Ω·m
Ohm Circular Mil per Foot to Ohm Metre conversion table
| Ohm Circular Mils per Foot (Ω·cmil/ft) | Ohm Metres (Ω·m) |
|---|---|
| 9.9 Ω·cmil/ft | 1.645801851 × 10⁻⁸ Ω·m |
| 10.37 Ω·cmil/ft | 1.723935879 × 10⁻⁸ Ω·m |
| 10.4 Ω·cmil/ft | 1.728923157 × 10⁻⁸ Ω·m |
| 16.8 Ω·cmil/ft | 2.792875869 × 10⁻⁸ Ω·m |
| 17 Ω·cmil/ft | 2.826124391 × 10⁻⁸ Ω·m |
| 30 Ω·cmil/ft | 4.987278338 × 10⁻⁸ Ω·m |
| 100 Ω·cmil/ft | 1.662426113 × 10⁻⁷ Ω·m |
| 433 Ω·cmil/ft | 7.198305067 × 10⁻⁷ Ω·m |
| 600 Ω·cmil/ft | 9.974556675 × 10⁻⁷ Ω·m |
| 675 Ω·cmil/ft | 0.000001122137626 Ω·m |
Where it's used
Ohm Circular Mils per Foot are used for US wire tables and AWG calculations, while ohm metres appear in conductor and alloy data sheets. Both measure electrical resistivity, so the conversion is a fixed factor.
Ohm Circular Mil per Foot to other electrical resistivity units
| Conversion | 1 Ω·cmil/ft equals |
|---|---|
| ohm circular mil per foot to ohm metre | 1.662426113 × 10⁻⁹ Ω·m |
| ohm circular mil per foot to microohm centimetre | 0.1662426113 µΩ·cm |
| ohm circular mil per foot to ohm centimetre | 1.662426113 × 10⁻⁷ Ω·cm |
| ohm circular mil per foot to ohm square millimetre per metre | 0.001662426113 Ω·mm²/m |
| ohm circular mil per foot to megaohm centimetre | 1.662426113 × 10⁻¹³ MΩ·cm |
| ohm circular mil per foot to microohm metre | 0.001662426113 µΩ·m |
| ohm circular mil per foot to nanoohm metre | 1.662426113 nΩ·m |
| ohm circular mil per foot to kiloohm centimetre | 1.662426113 × 10⁻¹⁰ kΩ·cm |
Frequently asked questions
How many ohm metres are in 1 ohm circular mil per foot?
1 Ω·cmil/ft = 1.662426113 × 10⁻⁹ Ω·m.
How do I convert ohm circular mils per foot to ohm metres?
Multiply the value in Ω·cmil/ft by 1.662426113 × 10⁻⁹, or divide it by 601530493.6. For example, 15 Ω·cmil/ft × 1.662426113 × 10⁻⁹ = 2.493639169 × 10⁻⁸ Ω·m.
Is the Ω·cmil/ft to Ω·m conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "circular mil".
- Copper Wire Tables, NBS Handbook 100 (International Annealed Copper Standard), National Bureau of Standards (now NIST) .
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures .
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Ohm Circular Mils per Foot to Ohm Metres. Retrieved October 25, 2026, from https://scientificconverters.com/electrical-resistivity/ohm-circular-mils-per-foot-to-ohm-meters/
IEEE
Scientific Converters, "Convert Ohm Circular Mils per Foot to Ohm Metres," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/electrical-resistivity/ohm-circular-mils-per-foot-to-ohm-meters/