Ohm Inch to Circular Mil Ohm/Foot Conversion

Convert between Ohm Inch and Circular Mil Ohm/Foot quickly and accurately.

From Ohm Inch

Ω·in

To Circular Mil Ohm/Foot

CM·Ω/ft

How to Convert Ohm Inch to Circular Mil Ohm/Foot

Conversion Formula

1 Ω·in = 15278874.532 CM·Ω/ft

1 CM·Ω/ft = 7E-8 Ω·in

Example

Convert 15 Ω·in to CM·Ω/ft:

15 Ω·in = 15 × 15278874.532 CM·Ω/ft = 229183117.985 CM·Ω/ft

Unit Information

Learn about the electric resistivity units you're converting between

Ohm Inch

Ω·in

Definition

An imperial unit of electric resistivity equal to 0.0254 ohm meters. Used primarily in countries following imperial measurement systems for electrical resistivity measurements and material characterization.

History/Origin

Developed as an imperial equivalent to the metric ohm centimeter for electrical resistivity measurements. The inch-based unit was commonly used in North American electrical engineering and manufacturing industries.

Current Use

Primarily used in North American electrical engineering, manufacturing, and quality control applications. Common in industries that follow imperial measurement standards for material resistivity testing and specification.

Multiplier

0.025

Offset

Circular Mil Ohm/Foot

CM·Ω/ft

Definition

A specialized unit of electric resistivity used in electrical engineering for wire and cable specifications. Combines the circular mil (area unit) with ohm per foot to express resistivity in terms of wire gauge and length.

History/Origin

Developed specifically for electrical wire and cable manufacturing in North America. The circular mil unit represents the cross-sectional area of a wire, making this unit practical for specifying wire resistivity in electrical applications.

Current Use

Extensively used in electrical wire and cable manufacturing, electrical engineering, and power distribution systems. Essential for calculating voltage drop, power loss, and conductor sizing in electrical installations.

Multiplier

2E-9

Offset