What is a furlong (US survey)?

It is a historical non-SI unit of length previously used in U.S. land surveying, equal to 660 US survey feet or about 201.1684 meters.

Why convert furlongs to astronomical units?

Converting allows integration of historical land measurements into astronomical contexts, facilitating comparisons between terrestrial and Solar System distances.

Is the furlong still used today?

The furlong is largely obsolete in modern measurements and mostly appears in historical documents or traditional race distances.

Convert Furlong (US survey) to Astronomical Unit (AU, UA)

Use this tool to convert lengths from furlong (US survey), a historical surveying unit, to astronomical units (AU, UA), the standard scale for Solar System distances.

Furlong (US survey) [fur]

Astronomical unit [AU, UA]

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

Furlong (US survey) [fur] to Astronomical unit [AU, UA] Conversion Table

Furlong (US survey) [fur]	Astronomical unit [AU, UA]

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 Astronomical unit [AU, UA] Conversion Table
Furlong (US survey) [fur]	Astronomical unit [AU, UA]

Explore More Length Units Converter

What Is This Tool?

This converter transforms values measured in furlongs (US survey), a traditional unit of length once used in U.S. land surveys, into astronomical units (AU, UA), which are used to express large distances within the Solar System. It aids in bridging terrestrial measurements with space-distance scales.

How to Use This Tool?

Enter the length value in furlong (US survey)
Select furlong (US survey) as the 'from' unit
Choose astronomical unit (AU, UA) as the 'to' unit
Click convert to see the length represented in astronomical units

Key Features

Converts furlong (US survey) to astronomical units based on an exact conversion rate
Supports interpretation of historical land measurements for scientific contexts
Browser-based and simple to use for quick length conversions
Helps relate local surveying units to planetary and space mission scales

Examples

10 furlongs converts to approximately 1.3447277117488e-8 astronomical units
100 furlongs converts to approximately 1.3447277117488e-7 astronomical units

Common Use Cases

Translating old U.S. parcel boundaries and land survey distances into astronomical unit scales
Interpreting historical cadastral documents for scientific study
Comparing terrestrial distances with Solar System scales in astrophysics and planetary science
Aiding space mission planning by expressing local land distances in cosmic lengths

Tips & Best Practices

Use the tool when dealing with historical or archival surveying data
Verify unit selections before converting to ensure accuracy
Be aware that furlong values convert to very small AU values, requiring careful interpretation
Utilize this converter to support educational material linking land measuring units with space distances

Limitations

Furlong (US survey) is a non-SI, historical unit no longer popular in modern scientific work
Astronomical units represent extremely large distances, so converted values from furlongs appear as tiny decimal fractions
Conversions may only be meaningful for archival, educational, or specific interdisciplinary applications

Frequently Asked Questions

What is a furlong (US survey)?: It is a historical non-SI unit of length previously used in U.S. land surveying, equal to 660 US survey feet or about 201.1684 meters.
Why convert furlongs to astronomical units?: Converting allows integration of historical land measurements into astronomical contexts, facilitating comparisons between terrestrial and Solar System distances.
Is the furlong still used today?: The furlong is largely obsolete in modern measurements and mostly appears in historical documents or traditional race distances.

Key Terminology

Furlong (US survey): A historical length unit used in US land surveying, defined as 660 US survey feet or roughly 201.1684 meters.
Astronomical Unit (AU, UA): A standard unit of length equal to exactly 149,597,870,700 meters, representing the average Earth-Sun distance.
Conversion Rate: The factor used to translate a measurement from one unit to another; here, 1 furlong (US survey) equals 1.3447277117488e-9 astronomical units.

Quick Knowledge Check

What is the furlong (US survey) primarily used for historically?

Measuring planetary distances

Land surveying and legal descriptions

Spacecraft trajectory planning

What does the astronomical unit (AU) represent?

Average distance from Earth to the Sun

Length of a furlong in meters

Width of the Milky Way galaxy

Why might values in furlongs convert to very small numbers in AU?

Because furlongs are larger than astronomical units

Because astronomical units measure much larger distances

Because the tools use approximate conversion

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