What is an acre (US survey)?

An acre (US survey) is an area unit based on U.S. survey feet, primarily used in U.S. land surveying and legal property descriptions.

How does a square mile relate to acres (US survey)?

A square mile is much larger, equivalent to exactly 2,589,988.110336 square meters, and one acre (US survey) equals about 0.0015625063 square miles.

Why might conversions between these units have slight errors?

Because the U.S. survey acre is slightly different from the international acre, and differing mile standards can affect precision in conversions.

How to Convert from Acre (US survey) [ac] to Square mile [mi^2]

Convert area measurements from acre (US survey) to square mile using an accurate unit converter designed for land surveying, real estate, and agricultural planning.

Acre (US survey) [ac]

Square mile [mi^2]

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

Acre (US survey) [ac] to Square mile [mi^2] Conversion Table

Acre (US survey) [ac]	Square mile [mi^2]

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.

Acre (US survey) [ac] to Square mile [mi^2] Conversion Table
Acre (US survey) [ac]	Square mile [mi^2]

Explore More Area Units Converter

What Is This Tool?

This converter helps transform land area values from acre (US survey), a measurement often used in U.S. land surveying, into square miles, a common unit for representing large geographic areas.

How to Use This Tool?

Enter the value representing the area in acre (US survey).
Select acre (US survey) as the source unit and square mile as the target unit.
Click the convert button to obtain the equivalent area in square miles.

Key Features

Converts acre (US survey) units, defined by U.S. survey feet, to square miles precisely.
Supports area measurements commonly used in legal, cadastral, and agricultural contexts.
Browser-based and easy to use for quick area conversions between local and large-scale units.

Examples

10 acres (US survey) converts to 0.015625063 square miles.
50 acres (US survey) converts to 0.078125315 square miles.

Common Use Cases

Describing parcel sizes in U.S. property deeds and land boundaries.
Aggregating small land parcel measurements for regional planning and comparison.
Reporting area statistics in urban development, environmental science, and government land management.

Tips & Best Practices

Verify the unit definitions to ensure correct conversion between U.S. survey and international standards.
Use precise input measurements to minimize rounding errors in large area calculations.
Confirm the context (legal, cadastral, or agricultural) when interpreting converted results.

Limitations

The U.S. survey acre is slightly larger than the international acre, which may cause minor discrepancies for large areas.
Different mile definitions (surveyor vs. international mile) require careful attention to avoid mistakes.
Conversion accuracy depends on the precision of input data and rounding in constants.

Frequently Asked Questions

What is an acre (US survey)?: An acre (US survey) is an area unit based on U.S. survey feet, primarily used in U.S. land surveying and legal property descriptions.
How does a square mile relate to acres (US survey)?: A square mile is much larger, equivalent to exactly 2,589,988.110336 square meters, and one acre (US survey) equals about 0.0015625063 square miles.
Why might conversions between these units have slight errors?: Because the U.S. survey acre is slightly different from the international acre, and differing mile standards can affect precision in conversions.

Key Terminology

Acre (US survey): An area unit based on U.S. survey feet, used mainly in U.S. land surveying and legal land descriptions.
Square mile: An imperial area unit representing the area of a square with 1-mile sides, commonly used for large geographic regions.
Conversion Rate: The numerical factor used to convert one measurement unit into another, such as 1 acre (US survey) equals 0.0015625063 square miles.

Quick Knowledge Check

What unit does an acre (US survey) use for its area basis?

Square international feet

Square U.S. survey feet

Square meters

Which unit is larger in area?

Acre (US survey)

Square mile

Both are equal

What is a common use of converting acres to square miles?

Calculating city land areas

Measuring liquid volumes

Estimating building heights

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