What is the nautical league (UK)?

It is a historical maritime unit of length used in British navigation equal to 3 UK nautical miles or approximately 5,556 metres.

How long is a UK nautical mile compared to the international nautical mile?

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

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

Q: Why convert from nautical league (UK) to nautical mile (UK)?

Converting helps translate older maritime distances into a smaller, more commonly used unit to better interpret and compare historical navigation data from British Admiralty sources.

Convert historical maritime distances from the UK nautical league to the UK nautical mile using our easy-to-use online length unit converter. Understand the differences and uses of these classic British naval measurement units.

Nautical league (UK)

Nautical mile (UK) [NM (UK)]

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

Nautical league (UK)	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.

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

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What Is This Tool?

This converter transforms lengths measured in the nautical league (UK), a historical maritime unit, into nautical miles (UK) [NM (UK)], a slightly different traditional British naval distance unit. It helps interpret and translate navigational data from British Admiralty records.

How to Use This Tool?

Enter the value in nautical leagues (UK) you want to convert
Select 'nautical league (UK)' as the source unit
Choose 'nautical mile (UK) [NM (UK)]' as the target unit
Click convert to obtain the equivalent distance in UK nautical miles

Key Features

Converts nautical league (UK) to nautical mile (UK) using established historical ratios
Browser-based and simple to use for quick maritime length conversions
Supports analysis of vintage British maritime charts and logs
Facilitates unit translation for maritime historians and researchers

Examples

2 nautical leagues (UK) converts to 6 nautical miles (UK) [NM (UK)]
0.5 nautical league (UK) equals 1.5 nautical miles (UK) [NM (UK)]

Common Use Cases

Interpreting distances on historic British Admiralty charts and ship logs
Converting voyage lengths from historical maritime documents into modern measurement units
Analyzing archival nautical data and period maps that express distances in leagues
Restoring or comparing vintage navigation instruments that use UK nautical measurements

Tips & Best Practices

Verify the context and time period of the nautical league used as definitions may vary historically
Consider the slight difference between UK nautical miles and international nautical miles when comparing units
Use this converter as part of broader research when working with British maritime records
Check and document original units in historical navigation and cartography materials before converting

Limitations

The nautical league (UK) is no longer in common use, and its historic definitions can vary
The UK nautical mile differs slightly from the international nautical mile, which may affect comparisons
Conversion is based on the league defined as exactly three UK nautical miles, which is an approximation

Frequently Asked Questions

What is the nautical league (UK)?: It is a historical maritime unit of length used in British navigation equal to 3 UK nautical miles or approximately 5,556 metres.
How long is a UK nautical mile compared to the international nautical mile?: The UK nautical mile is defined as exactly 6,080 feet (1,853.184 metres), making it slightly longer than the international nautical mile, which is exactly 1,852 metres.
Why convert from nautical league (UK) to nautical mile (UK)?: Converting helps translate older maritime distances into a smaller, more commonly used unit to better interpret and compare historical navigation data from British Admiralty sources.

Key Terminology

Nautical League (UK): A historical British maritime unit equal to 3 UK nautical miles, approximately 5,556 metres, used in old Admiralty charts.
Nautical Mile (UK) [NM (UK)]: Also called the Admiralty nautical mile, it is exactly 6,080 feet (1,853.184 metres) and was used historically in British maritime navigation.

Quick Knowledge Check

What is the conversion rate from a nautical league (UK) to a nautical mile (UK)?

1 nautical league (UK) = 2 nautical miles (UK)

1 nautical league (UK) = 3 nautical miles (UK)

1 nautical league (UK) = 4 nautical miles (UK)

How is a UK nautical mile defined?

Exactly 1,852 metres

Exactly 6,080 feet

Exactly 5,556 metres

Why should you be cautious when comparing UK nautical miles to international nautical miles?

They have identical definitions

The UK nautical mile is slightly longer than the international nautical mile

The international nautical mile is measured in feet

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