What is a furlong (US survey)?

It is a historical length unit used in U.S. land surveying, defined as exactly 660 US survey feet or 1/8 of a US survey mile.

Why convert furlongs to nautical miles?

This conversion helps integrate historical land survey data with modern marine and aerial navigation systems and understand distances across contexts.

Is the nautical mile used only for marine navigation?

Primarily yes; nautical miles are standard units for marine and aeronautical charts, speeds, and coastal charting.

How to Convert Furlong (US survey) to Nautical Mile (international)

Easily convert length measurements from furlong (US survey) to nautical mile (international) using our practical online unit converter tool. Learn about usage, features, and examples.

Furlong (US survey) [fur]

Nautical mile (international)

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Furlong (US survey) [fur] to Nautical mile (international) Conversion Table

Furlong (US survey) [fur]	Nautical mile (international)

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.

Furlong (US survey) [fur] to Nautical mile (international) Conversion Table
Furlong (US survey) [fur]	Nautical mile (international)

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What Is This Tool?

This tool converts length values from the US survey furlong, a historical unit used primarily in U.S. land surveying and traditional distances, into the international nautical mile, a unit designed for marine and aeronautical navigation.

How to Use This Tool?

Enter the measurement value in furlongs (US survey) in the input field.
Select the source unit as furlong (US survey) and the target unit as nautical mile (international).
Initiate the conversion to see the equivalent distance in nautical miles instantly.
Refer to examples for guidance on typical conversions.
Use the result for integrating historic land data with modern navigation systems.

Key Features

Supports conversion between furlong (US survey) and nautical mile (international).
Provides a clear conversion formula and rate for accuracy.
Includes examples to illustrate common conversion scenarios.
Useful for historical land survey interpretation and modern navigational purposes.
Browser-based and user-friendly interface for quick calculations.

Examples

Converting 5 furlongs (US survey) yields approximately 0.543 nautical miles (international).
Converting 10 furlongs (US survey) equals about 1.086 nautical miles (international).

Common Use Cases

Translating older U.S. land survey measurements into standardized nautical units.
Interpreting historical cadastral maps, deeds, and survey documents.
Calculating marine and aeronautical distances for navigation and route planning.
Converting traditional horse racing distances for global understanding.
Integrating legacy measurement data with modern geospatial analyses.

Tips & Best Practices

Make sure to confirm the context of the original unit—allay confusion between historical and international furlongs.
Use this conversion for nautical and aeronautical contexts rather than land-only applications.
Reference official definitions to maintain consistency when interpreting legacy data.
Cross-check converted results when integrating with modern navigation or surveying systems.
Keep in mind the tool’s conversion assumes exact standard definitions.

Limitations

The US survey furlong is a historical, non-SI unit that may cause ambiguity versus modern units.
Nautical miles are specialized for marine and aeronautical navigation and may not suit land measurements.
Minor discrepancies could arise from differing standards or local surveying methods despite exact definitions.

Frequently Asked Questions

What is a furlong (US survey)?: It is a historical length unit used in U.S. land surveying, defined as exactly 660 US survey feet or 1/8 of a US survey mile.
Why convert furlongs to nautical miles?: This conversion helps integrate historical land survey data with modern marine and aerial navigation systems and understand distances across contexts.
Is the nautical mile used only for marine navigation?: Primarily yes; nautical miles are standard units for marine and aeronautical charts, speeds, and coastal charting.

Key Terminology

Furlong (US survey): A historical non-SI unit of length equal to 660 US survey feet, used in traditional U.S. land surveying.
Nautical mile (international): A unit of length exactly 1852 meters, used for measuring marine and aeronautical distances.
Conversion rate: The factor used to translate a measurement from furlong (US survey) to nautical mile (international), defined as 1 furlong equals approximately 0.1086222475 nautical miles.

Quick Knowledge Check

What is the US survey furlong primarily used for?

Measuring aircraft speed

Historic U.S. land surveying and legal descriptions

Modern metric system measurements

How is one international nautical mile defined?

Exactly 1852 meters

Exactly 201.1684 meters

Exactly 660 feet

Which context best suits nautical miles?

Land parcel boundary measurement

Marine and aeronautical navigation

Historical deed descriptions

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