What Is This Tool?
This tool converts electrical resistivity measurements from circular mil ohm per foot to ohm inch, enabling comparisons between wire-specific resistivity data and bulk material resistivity values in differing unit systems.
How to Use This Tool?
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Enter the resistivity value in circular mil ohm/foot
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Select circular mil ohm/foot as the input unit
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Select ohm inch as the output unit
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Click the convert button to see the result displayed
Key Features
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Fast and precise conversion between circular mil ohm/foot and ohm inch units
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Supports electrical resistivity units commonly used in engineering and materials science
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Browser-based tool requiring no installation
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Facilitates comparison of conductor resistivity and bulk material resistivity values
Examples
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Convert 10 circular mil ohm/foot to ohm inch to get 6.5449846968639e-7 Ω·in
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Convert 100 circular mil ohm/foot to ohm inch to get 6.5449846968639e-6 Ω·in
Common Use Cases
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Calculating conductor resistance based on length and cross-sectional area using the relation R = ρ·L/A
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Preparing conductor resistance tables for power distribution and sizing
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Comparing copper and aluminum conductor resistivities for cable design
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Characterizing bulk resistivity of metals and alloys in electrical-contact engineering
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Specifying volume resistivity of insulation materials in testing and standards
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Reporting resistivity values in legacy or imperial unit datasheets and specifications
Tips & Best Practices
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Ensure consistent unit usage when interpreting resistivity data
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Understand the reference cross-sectional areas and lengths of each unit for accurate context
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Use the tool to reconcile differences between practical wiring units and bulk material measurements
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Be mindful of the small conversion factor and maintain numerical precision in calculations
Limitations
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Units refer to different reference dimensions, assuming uniform material properties during conversion
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Variations in conductor geometry or measurement conditions can affect equivalence
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The very small conversion factor requires careful handling of numerical precision to avoid errors
Frequently Asked Questions
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What does circular mil ohm per foot measure?
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It is a unit expressing electrical resistivity of a conductor based on a cross-sectional area of one circular mil and a length of one foot.
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Why convert circular mil ohm/foot to ohm inch?
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Conversion helps compare conductor resistivity data with bulk material resistivity values common in materials science and electrical engineering.
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Can this conversion be used for all conductor types?
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The conversion assumes uniform material properties and dimensions; differences in geometry or conditions may limit accuracy.
Key Terminology
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Circular mil ohm/foot
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A resistivity unit related to resistance for a conductor one foot long with cross-sectional area of one circular mil.
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Ohm inch
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A unit of resistivity defined as the resistance of a material one inch long with a cross-section of one square inch.
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Electrical resistivity
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A measure of how strongly a material opposes the flow of electric current.