What is a perch as a unit of length?

A perch is a historical unit of length equal to 16.5 feet, primarily used in land surveying and now largely obsolete.

How is the US survey fathom defined and used?

The US survey fathom is a nautical length unit equal to 6 US survey feet, used for measuring water depths and line lengths in maritime contexts.

Why convert perch to US survey fathom?

Converting perch to US survey fathom helps reconcile historical land measurements with nautical and hydrographic data for accurate mapping.

How to Convert from Perch to Fathom (US survey) [fath]

Convert length measurements from perch to US survey fathom with ease. Learn about these historical and nautical units, their uses, and how to accurately perform conversions for surveying and maritime applications.

Perch

Fathom (US survey) [fath]

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Perch to Fathom (US survey) [fath] Conversion Table

Perch	Fathom (US survey) [fath]

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

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Interval

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

Perch to Fathom (US survey) [fath] Conversion Table
Perch	Fathom (US survey) [fath]

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What Is This Tool?

This unit converter helps you translate lengths measured in perch, a historical surveying unit, into US survey fathom, a nautical unit used for measuring water depth and line lengths. It is useful for handling legacy data in land surveying, hydrography, and maritime navigation.

How to Use This Tool?

Enter the length value in perch you want to convert
Select perch as the input unit and US survey fathom as the output unit
Click on the convert button to get the equivalent length in fathoms
Review the converted value and use it for your surveying or nautical needs

Key Features

Converts perch (historical land measurement unit) to US survey fathom (nautical length unit)
Supports legacy data interpretations from historical deeds and hydrographic surveys
Browser-based and easy to use without installation
Provides precise conversion using the fixed rate of 1 perch = 2.7499945 fathoms
Useful for surveying, maritime navigation, and historical record translations

Examples

3 perch converts to 8.2499835 US survey fathoms
0.5 perch converts to 1.37499725 US survey fathoms

Common Use Cases

Interpreting historical property and land survey measurements recorded in perch
Translating legacy nautical data such as water depths and cable lengths into standard units
Reconciling old land survey records with hydrographic and maritime charts
Converting old cadastral dimensions for modern mapping and documentation

Tips & Best Practices

Verify historical source documents carefully as perch is an obsolete unit
Be aware that the US survey fathom differs slightly from the international fathom
Use this converter to bridge old land measurement data with modern nautical applications
Handle rounding and legacy measurement imprecision cautiously when interpreting results

Limitations

Perch is an outdated unit, so original measurements may lack precision
US survey fathom differs slightly from international fathom; conversions should consider this
Legacy surveying methods and documents may introduce rounding or inaccuracies

Frequently Asked Questions

What is a perch as a unit of length?: A perch is a historical unit of length equal to 16.5 feet, primarily used in land surveying and now largely obsolete.
How is the US survey fathom defined and used?: The US survey fathom is a nautical length unit equal to 6 US survey feet, used for measuring water depths and line lengths in maritime contexts.
Why convert perch to US survey fathom?: Converting perch to US survey fathom helps reconcile historical land measurements with nautical and hydrographic data for accurate mapping.

Key Terminology

Perch: A historical length unit equal to 16.5 feet, used mainly in land surveying and now mostly obsolete.
US survey fathom: A non-SI nautical length unit equal to 6 US survey feet, used for measuring water depths and line lengths.
Conversion rate: The fixed numerical value (1 perch = 2.7499945 US survey fathoms) used to translate between these two units.

Quick Knowledge Check

What is the length of one perch in feet?

16.5 feet

10 feet

12 feet

Which of these is true about the US survey fathom?

It equals exactly 1.8288 meters

It is equal to 6 US survey feet

It is a metric unit

Why is converting perch to fathom useful?

To interpret historical land records with nautical data

To convert metric units only

To estimate weight measurements

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