What is a circular inch?

A circular inch is the area of a circle with a diameter of one inch, used to express the cross-sectional area of round objects.

Where is the acre (US survey) mainly used?

The acre (US survey) is primarily used in U.S. land surveying, property deeds, and cadastral records.

Can this conversion be used for precision land surveys?

Because of precision differences related to the U.S. survey foot, care is needed when using this conversion for high-precision surveys or legal documentation.

How to Convert from Circular Inch to Acre (US survey) [ac]

Convert area measurements from circular inch to acre (US survey) using this easy-to-use online unit converter. Ideal for engineering and land surveying applications.

Circular inch

Acre (US survey) [ac]

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

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

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

Explore More Area Units Converter

What Is This Tool?

This tool converts area values from circular inch, a unit used for measuring cross-sectional areas of round objects, to acre (US survey), a land measurement commonly used in U.S. property and cadastral records.

How to Use This Tool?

Enter the value in circular inch you want to convert.
Select circular inch as the input unit and acre (US survey) as the output unit.
Click the convert button to see the equivalent area measurement in acres (US survey).

Key Features

Converts circular inch to acre (US survey) accurately using established definitions.
Supports area measurements relevant in engineering and land surveying fields.
Browser-based and easy to use without requiring installation.

Examples

10 circular inches converts to approximately 0.0000012521 acre (US survey).
1,000,000 circular inches is equivalent to about 0.1252096 acre (US survey).

Common Use Cases

Specifying cross-sectional areas of large round electrical conductors or cables.
Describing parcel sizes in U.S. property deeds and legal boundary descriptions.
Converting between fine-scale circular measurements and large-scale land area units for cadastral records.

Tips & Best Practices

Use this converter when dealing with interdisciplinary measurements linking engineering and land surveying.
Ensure awareness of unit differences due to the U.S. survey foot definition when interpreting results for legal use.
Aggregate numerous circular inch measurements appropriately to represent significant land areas.

Limitations

Conversion between very small circular inch areas and large acre areas is limited in direct practical use without scaling.
Differences in precision arise from the exact definition of the U.S. survey foot used in acres.
Care should be taken when applying this conversion in high-precision surveying or official legal documents.

Frequently Asked Questions

What is a circular inch?: A circular inch is the area of a circle with a diameter of one inch, used to express the cross-sectional area of round objects.
Where is the acre (US survey) mainly used?: The acre (US survey) is primarily used in U.S. land surveying, property deeds, and cadastral records.
Can this conversion be used for precision land surveys?: Because of precision differences related to the U.S. survey foot, care is needed when using this conversion for high-precision surveys or legal documentation.

Key Terminology

Circular Inch: An area unit representing a circle with a diameter of one inch, equal to π/4 square inches.
Acre (US survey): A land area unit defined as 43,560 square U.S. survey feet, used in U.S. land surveying and legal property descriptions.
U.S. Survey Foot: A unit of length exactly equal to 1200/3937 metres, forming the basis of the U.S. survey acre.

Quick Knowledge Check

What does a circular inch represent?

An area of a square inch

The area of a circle with one inch diameter

The length of a circular wire

What is the primary use of the acre (US survey)?

Electrical engineering measurements

Land surveying and property records in the U.S.

Measuring cross-sectional cable area

What should be considered when converting circular inches to acres (US survey)?

They measure different dimensions

Differences in unit precision and scale

Only used for international land measurements

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