What is a circular mil?

A circular mil is a non-SI area unit that represents the cross-sectional area of a circle with a diameter of one mil (0.001 inch), largely used for electrical wire sizing.

What is the U.S. survey acre used for?

The U.S. survey acre is primarily used in U.S. land surveying, legal property descriptions, and cadastral mapping based on the U.S. survey foot.

Why convert circular mils to acres (US survey)?

Converting circular mils to acres helps integrate electrical conductor areas with land surveying or property boundary analyses, especially for interdisciplinary applications.

Convert Circular Mil to Acre (US Survey) Area Units

Easily convert area measurements from circular mil to U.S. survey acre [ac] with this online converter. Ideal for electrical engineering and land surveying applications.

Circular mil

Acre (US survey) [ac]

Please check your input. It must be a valid numeric value.

Circular mil to Acre (US survey) [ac] Conversion Table

Circular mil	Acre (US survey) [ac]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Circular mil to Acre (US survey) [ac] Conversion Table
Circular mil	Acre (US survey) [ac]

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What Is This Tool?

This unit converter translates area measurements from circular mils, used primarily in electrical conductor sizing, to acres based on the U.S. survey foot system, common in land surveying and property boundary descriptions.

How to Use This Tool?

Enter the area value in circular mils you wish to convert
Select 'circular mil' as the input unit and 'acre (US survey) [ac]' as the output unit
Click the convert button to get the equivalent area in acres
Interpret results in the context of electrical or land area measurements

Key Features

Converts area units from circular mil to U.S. survey acre [ac]
Supports interdisciplinary applications between electrical engineering and land surveying
Utilizes standard conversion rate between circular mil and acre (US survey)
Browser-based and user-friendly interface

Examples

1 circular mil equals approximately 1.2520964407457e-13 acre (US survey)
1,000,000 circular mils convert to about 1.2520964407457e-7 acres (US survey)

Common Use Cases

Sizing and ampacity determination for round electrical conductors
Converting American Wire Gauge (AWG) sizes to area for engineering calculations
Describing parcel sizes and boundaries in U.S. land surveying and property deeds
Interpreting cadastral maps and historical land area records using U.S. survey feet

Tips & Best Practices

Use this conversion primarily for very large values of circular mils due to the small unit scale
Consider differences between the U.S. survey acre and the international acre when comparing data internationally
Apply the tool for interdisciplinary projects linking electrical area specifications with land measurements
Ensure correct unit selections to avoid confusion in results

Limitations

Circular mil units are extremely small compared to acres, so conversions are practical mainly for large quantities
Potential precision loss and relevance issues when expressing small electrical areas as acres
Slight differences exist between U.S. survey acre and international acre that affect comparability globally

Frequently Asked Questions

What is a circular mil?: A circular mil is a non-SI area unit that represents the cross-sectional area of a circle with a diameter of one mil (0.001 inch), largely used for electrical wire sizing.
What is the U.S. survey acre used for?: The U.S. survey acre is primarily used in U.S. land surveying, legal property descriptions, and cadastral mapping based on the U.S. survey foot.
Why convert circular mils to acres (US survey)?: Converting circular mils to acres helps integrate electrical conductor areas with land surveying or property boundary analyses, especially for interdisciplinary applications.

Key Terminology

Circular mil: A unit of area equal to the area of a circle with diameter one mil (0.001 inch), mainly used for electrical wire cross-sections.
Acre (US survey): An area unit equal to 43,560 square U.S. survey feet, commonly used in U.S. land surveying and legal property descriptions.
U.S. survey foot: A unit of length used in certain U.S. land surveying measurements, defined as exactly 1200/3937 meters.

Quick Knowledge Check

What does one circular mil represent?

The area of a square one inch on each side

The area of a circle with a diameter of one mil (0.001 inch)

The area of a circle with a diameter of one foot

What is the main application of the U.S. survey acre?

Measuring cross-sectional area of electrical cables

Describing land parcels in U.S. land surveys and legal deeds

Measuring volume in fluid dynamics

Why should large quantities of circular mil be used for conversion to acres?

Because circular mil is extremely large compared to the acre

Because circular mil is extremely small compared to the acre

Because circular mil and acre are identical sizes

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