Why is the US survey acre different from the international acre?

The US survey acre is defined using the US survey foot, which differs slightly from the international foot, making the US survey acre a bit larger than the international acre.

When should I use square pole for area measurements?

Square pole is typically used in historical or traditional land surveys, legal property descriptions, and when working with older cadastral records that include imperial units.

Can I use this converter for modern land surveying?

While the converter is helpful for historical and legal contexts, modern surveying often uses metric or standardized imperial units instead of square pole.

Convert Acre (US Survey) to Square Pole - Online Area Unit Converter

Easily convert area measurements from acre (US survey) to square pole using our online unit converter. Perfect for land surveying, legal property descriptions, and historical land records.

Acre (US survey) [ac]

Square pole

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

Acre (US survey) [ac] to Square pole Conversion Table

Acre (US survey) [ac]	Square pole

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 pole Conversion Table
Acre (US survey) [ac]	Square pole

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What Is This Tool?

This tool allows you to convert area values from the U.S. survey acre to the square pole unit. It is designed for users working with land measurement systems found in U.S. and UK surveying and cadastral records.

How to Use This Tool?

Enter the area value in acre (US survey) that you want to convert
Select 'acre (US survey)' as the input unit and 'square pole' as the output unit
Click the convert button to get the equivalent area in square pole
Review the converted value to interpret or compare land measurements accurately
Use multiple conversions to analyze or document land parcel sizes

Key Features

Converts acre (US survey) precisely to square pole based on official definitions
Ideal for land surveying, property deed analysis, and historical land records
Browser-based, easy to use without any downloads
Supports legal and cadastral record interpretation requiring both units
Includes clear examples illustrating typical conversions

Examples

2 acre (US survey) converts to 320.00128 square pole
0.5 acre (US survey) converts to 80.00032 square pole
Use the formula: 1 acre (US survey) = 160.0006400019 square pole

Common Use Cases

Describing U.S. property deed parcel sizes and boundaries
Converting and interpreting historical land survey records in the U.S. and UK
Migrating older cadastral records to modern measurement systems
Surveying and legal documentation where imperial units remain in use
Assessing agricultural land areas recorded using U.S. survey-foot data

Tips & Best Practices

Always confirm the units used in your source data to avoid inaccuracies
Consider the slight size difference between the US survey acre and international acre
Use this converter primarily for historical or legal contexts where both units appear
Cross-verify results when high precision is required due to subtle rounding variations
Keep in mind that square pole is largely a historical unit and less common in modern use

Limitations

The US survey acre is slightly larger than the international acre, affecting exactness
Square pole is mostly a historical or regional measurement unit, not widely used today
Minor rounding differences can occur because of the exact definitions involved
Modern surveying often prefers metric or standard imperial units over square pole

Frequently Asked Questions

Why is the US survey acre different from the international acre?: The US survey acre is defined using the US survey foot, which differs slightly from the international foot, making the US survey acre a bit larger than the international acre.
When should I use square pole for area measurements?: Square pole is typically used in historical or traditional land surveys, legal property descriptions, and when working with older cadastral records that include imperial units.
Can I use this converter for modern land surveying?: While the converter is helpful for historical and legal contexts, modern surveying often uses metric or standardized imperial units instead of square pole.

Key Terminology

Acre (US survey): An area unit defined as 43,560 square U.S. survey feet, used mainly in U.S. land surveying and legal boundaries.
Square pole: An imperial area unit equal to a square with sides of one pole (rod), equivalent to 272.25 square feet or 1/160 of an acre.
U.S. survey foot: A foot measurement exactly equal to 1200/3937 meters, used in defining the US survey acre.

Quick Knowledge Check

What is the conversion rate from 1 acre (US survey) to square pole?

1 acre = 150 square pole

1 acre = 160.0006400019 square pole

1 acre = 170 square pole

Which shape and size define a square pole?

A square one pole (rod) on each side covering 272.25 square feet

A circle with a radius of one pole

A rectangle one chain long and one furlong wide

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

Measuring small indoor areas

Describing parcel sizes in U.S. land surveying and legal property deeds

Measuring volumes of liquids

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