What is a mil used for?

A mil, also known as a thou, is commonly used in U.S. manufacturing and engineering to specify small thicknesses, clearances, and tolerances such as paint thickness, PCB trace widths, and wire diameters.

Where is the US survey furlong commonly applied?

The US survey furlong is used in historical land surveying, legal land descriptions, older cadastral surveys, and traditional race distances such as horse racing.

Why should I be careful converting between mil and furlong?

Because the mil is very small and the furlong is very large, conversions involve extremely small decimal numbers, requiring careful attention to unit contexts to avoid confusion.

How to Convert from Mil [mil, thou] to Furlong (US survey) [fur]

Learn how to convert small length measurements from mil (thou), a unit commonly used in manufacturing and engineering, to the historical US survey furlong, a large land measurement unit in surveying and legal contexts.

Mil [mil, thou]

Furlong (US survey) [fur]

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Mil [mil, thou] to Furlong (US survey) [fur] Conversion Table

Mil [mil, thou]	Furlong (US survey) [fur]

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.

Mil [mil, thou] to Furlong (US survey) [fur] Conversion Table
Mil [mil, thou]	Furlong (US survey) [fur]

Explore More Length Units Converter

What Is This Tool?

This converter allows users to convert length values from mil (also called thou), a thousandth of an inch used mainly in manufacturing and electronics, to the US survey furlong, a traditional unit of land measurement in the United States used in surveying and legal land descriptions.

How to Use This Tool?

Enter the value in mil (mil, thou) that you want to convert.
Select furlong (US survey) [fur] as the target unit.
Click the convert button to get the equivalent value in furlongs.
Use the results to understand the relationship between small-scale measurements and large land distances.

Key Features

Converts length units between mil (mil, thou) and furlong (US survey) accurately based on defined conversion rates.
Supports interpretation of very small engineering measurements in terms of large-scale historical land units.
Useful for bridging measurements used in manufacturing, electronics, surveying, and historical cartography.
Browser-based and easy to use for quick length unit conversions.

Examples

1000 mil equals approximately 0.00012626237373737 furlong (US survey).
500,000 mil equals approximately 0.063131186868685 furlong (US survey).

Common Use Cases

Specifying thickness or tolerances in manufacturing and engineering.
Designing PCB trace widths and spacing in electronics.
Describing film, wire diameters, or gap tolerances in mechanical fabrication.
Interpreting parcel boundaries and distances from older US cadastral surveys.
Converting historical maps, deeds, and survey records into modern units.
Reporting traditional race distances and other customary measurements.

Tips & Best Practices

Double-check unit contexts to avoid mixing modern metric, imperial, and historical units.
Use this converter to aid understanding of legacy documents involving both very small and very large units.
Be aware of precision requirements when working with extremely small decimal values in conversions.
Refer to the defined conversion rates instead of informal estimates.

Limitations

Furlong (US survey) is a historical unit and is rarely used in modern measurement systems, which may cause confusion.
The mil is a very small unit and the furlong is very large, resulting in conversion outputs with very small decimal numbers.
Users must ensure the correct unit context to avoid misinterpretation between metric, imperial, and historical units.

Frequently Asked Questions

What is a mil used for?: A mil, also known as a thou, is commonly used in U.S. manufacturing and engineering to specify small thicknesses, clearances, and tolerances such as paint thickness, PCB trace widths, and wire diameters.
Where is the US survey furlong commonly applied?: The US survey furlong is used in historical land surveying, legal land descriptions, older cadastral surveys, and traditional race distances such as horse racing.
Why should I be careful converting between mil and furlong?: Because the mil is very small and the furlong is very large, conversions involve extremely small decimal numbers, requiring careful attention to unit contexts to avoid confusion.

Key Terminology

Mil (mil, thou): A unit of length equal to one thousandth of an inch (0.001 in), used mainly in manufacturing and engineering for specifying small thicknesses and tolerances.
Furlong (US survey): A historical unit of length used in U.S. surveying equal to 660 US survey feet, commonly found in older land surveys and legal descriptions.

Quick Knowledge Check

What does a mil measure?

A unit of land distance used in surveying

A thousandth of an inch used in manufacturing and engineering

A measurement of time

What is the US survey furlong typically used for?

Measuring electronic component sizes

Describing historical land boundaries and legal surveys

Calculating the thickness of coatings

Which statement about converting mil to furlong is true?

Both units measure extremely similar small lengths

Conversion results often involve very small decimal numbers

Furlong is smaller than mil

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