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How to Convert from Ampere/square mil [A/mi^2] to Ampere/circular mil
Learn how to convert surface current density units from ampere per square mil to ampere per circular mil, commonly used in electrical engineering for wire sizing and conductor analysis.
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Ampere/square mil [A/mi^2] to Ampere/cicular mil Conversion Table
| Ampere/square mil [A/mi^2] | Ampere/cicular mil |
|---|
Custom Unit Conversion Table Generator – Instant Printable Conversion Tables
Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.
Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.
| Ampere/square mil [A/mi^2] | Ampere/cicular mil |
|---|
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What Is This Tool?
This converter transforms surface current density values expressed in ampere per square mil, a unit measuring electric current per unit area in square mils, into ampere per circular mil, which represents current per unit cross-sectional area in circular mils. It facilitates conversions between planar and round conductor measurements.
How to Use This Tool?
- Enter the value in ampere per square mil you wish to convert
- Select ampere per square mil as the source unit
- Choose ampere per circular mil as the target unit
- Click the convert button to obtain the equivalent current density in ampere per circular mil
Key Features
- Converts units of surface current density between ampere/square mil and ampere/circular mil
- Supports electrical engineering applications such as PCB design, microelectronics, and wire sizing
- Browser-based and easy to use without additional software
- Provides precise conversion based on established geometric relations
- Helps translate current density to match conductor cross-section specifications
Examples
- 1 A/mi^2 equals approximately 0.7854 A/circular mil
- 10 A/mi^2 converts to about 7.8540 A/circular mil
Common Use Cases
- Specifying allowable current density and thermal limits in inch-based electrical designs
- Evaluating surface current densities for RF and high-frequency conductor layouts
- Sizing microelectronic interconnects and testing coupons based on mil-area units
- Wire sizing and ampacity calculations for round conductors using circular mil units
- Comparing conductor capacities for thermal and derating analyses
Tips & Best Practices
- Ensure the correct source and target units are selected before conversion
- Use this tool when dealing with imperial mil-based conductor dimensions
- Verify the conductor shape matches the unit assumptions (planar vs round cross-section)
- Consider additional conversion when working with metric or SI units
- Apply conversions consistently for thermal and electrical engineering calculations
Limitations
- The conversion presumes accurate geometric area definitions and uniform current distribution
- May not be applicable when conductor shapes deviate significantly from ideal assumptions
- Mostly limited to small-area mil-based applications rather than SI or metric systems
- Practical precision may vary due to rounding in common engineering workflows
Frequently Asked Questions
- What does ampere per square mil measure?
- It measures electric current flowing per unit area where the area is given in square mils, commonly used for surface current density in inch-based designs.
- Why convert to ampere per circular mil?
- Because ampere per circular mil expresses current per circular mil area, which is important for wire sizing and assessing round conductor capacity.
- Can I use this converter for metric units?
- No, this tool is designed for mil-based units; metric or SI conversions require additional steps.
- Is the conversion exact for all conductor shapes?
- No, this conversion assumes ideal geometric shapes and uniform current distribution; deviations may impact accuracy.
Key Terminology
- Ampere per square mil [A/mi^2]
- A unit expressing electric current per surface area measured in square mils, used for surface current density.
- Ampere per circular mil
- A unit expressing electric current per unit cross-sectional area measured in circular mils, important for wire ampacity.
- Circular mil (cmil)
- A unit of area corresponding to the cross-sectional area of a conductor one mil in diameter, used in wire sizing.
- Square mil
- A unit of area measuring one mil by one mil, useful for describing small surface areas in imperial units.