What is a perch unit used for?

A perch is an old unit of length historically used mainly in land surveying and measuring property boundaries.

How does the UK nautical mile differ from the international nautical mile?

The UK nautical mile is defined as exactly 6,080 feet (1,853.184 metres), which is slightly longer than the international nautical mile set at exactly 1,852 metres.

Why would I need to convert perch to UK nautical miles?

This conversion helps interpret and compare historical land surveying data with maritime navigation distances recorded in UK Admiralty charts.

How to Convert from Perch to Nautical mile (UK) [NM (UK)]?

Easily convert length units from perch to the UK nautical mile (NM UK) with this online tool. Translate historical land measurements to maritime distances using accurate conversion rates.

Perch

Nautical mile (UK) [NM (UK)]

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

Perch to Nautical mile (UK) [NM (UK)] Conversion Table

Perch	Nautical mile (UK) [NM (UK)]

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.

Perch to Nautical mile (UK) [NM (UK)] Conversion Table
Perch	Nautical mile (UK) [NM (UK)]

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What Is This Tool?

This converter transforms lengths measured in perch, a historical unit used mainly in land surveying, into the UK nautical mile (NM UK), which was historically employed in maritime navigation within the UK. It assists users in interpreting and comparing old property, surveying, and nautical records.

How to Use This Tool?

Enter the value in perch you wish to convert
Select perch as the input unit and UK nautical mile (NM UK) as the output unit
Click to convert and receive the equivalent length in NM (UK)
Use the converted results to interpret historical or maritime charts and documents

Key Features

Converts perch, an old land measurement unit, to UK nautical mile (NM UK) values
Uses the exact historical conversion factor linking perch to NM (UK)
Supports translating historical surveying and maritime measurements
Browser-based and simple to use for quick calculations
Helps in comparing old land and nautical measurements accurately

Examples

10 perch equals 0.027138158 UK nautical miles
50 perch converts to 0.13569079 UK nautical miles

Common Use Cases

Deciphering dimensions from historical deeds and land boundaries
Translating old surveying or estate records into nautical measurements
Reading distances on UK Admiralty maritime charts and navigation logs
Converting legacy maritime documents for modern unit comparison
Restoring or comparing older navigation instruments and datasets

Tips & Best Practices

Understand the historical context when using obsolete units like perch
Verify unit definitions when dealing with UK versus international nautical miles
Use this conversion to aid interpretation of legacy land and maritime records
Be mindful of potential rounding in historical documents
Consult original sources for critical legal or navigational applications

Limitations

Perch is an outdated, regional unit which can cause imprecision in conversions
UK nautical mile slightly differs from the international nautical mile definition
Rounding or measurement inaccuracies may exist in historical records
Conversion may not perfectly match modern surveying or navigational standards

Frequently Asked Questions

What is a perch unit used for?: A perch is an old unit of length historically used mainly in land surveying and measuring property boundaries.
How does the UK nautical mile differ from the international nautical mile?: The UK nautical mile is defined as exactly 6,080 feet (1,853.184 metres), which is slightly longer than the international nautical mile set at exactly 1,852 metres.
Why would I need to convert perch to UK nautical miles?: This conversion helps interpret and compare historical land surveying data with maritime navigation distances recorded in UK Admiralty charts.

Key Terminology

Perch: A historical unit of length equal to 16.5 feet, formerly used in land surveying and property measurement.
Nautical Mile (UK) [NM (UK)]: The UK nautical mile defined as exactly 6,080 feet or 1,853.184 metres, historically used in UK maritime navigation.
Conversion Rate: The factor used to translate perch measurements into UK nautical miles, specifically 1 perch equals 0.0027138158 NM (UK).

Quick Knowledge Check

What is a perch primarily used for?

Measuring maritime distances

Land surveying and old property measurements

Modern engineering projects

How long is one UK nautical mile defined as?

Exactly 1,852 metres

Exactly 6,080 feet

Exactly 5,029.2 metres

Why must caution be taken when converting to UK nautical miles?

It differs slightly from the international nautical mile

It is an exact measurement in all contexts

It is used interchangeably worldwide

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