What is the Earth's distance from the Sun used in this converter?

It uses the astronomical unit defined by the International Astronomical Union as exactly 149,597,870,700 meters, representing the average distance between Earth and the Sun.

What is a US survey link and why is it important?

The US survey link is a historical length unit equal to 1/100 of a Gunter’s chain, used in land surveying and cadastral records in the United States.

Can this tool convert instantaneous Earth-Sun distances?

No, it assumes the mean distance defined by the astronomical unit; instantaneous distances vary and are not accounted for here.

How to Convert from Earth's Distance from Sun to Link (US survey) [li]

Learn how to convert distances measured in Earth's distance from the Sun (astronomical units) to the US survey link, a historical length unit used in land surveying.

Earth's distance from sun

Link (US survey) [li]

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

Earth's distance from sun to Link (US survey) [li] Conversion Table

Earth's distance from sun	Link (US survey) [li]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

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End Value

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Earth's distance from sun to Link (US survey) [li] Conversion Table
Earth's distance from sun	Link (US survey) [li]

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What Is This Tool?

This converter transforms values from Earth's distance from the Sun, known as the astronomical unit (AU), into links, a historical US survey unit used mainly for land measurement and cadastral data. It helps bridge astronomical and surveying scales.

How to Use This Tool?

Enter the length value in Earth's distance from the Sun (AU).
Select the target unit as link (US survey) [li].
Click convert to see the equivalent measurement in links.
Use the results to compare astronomical distances with historical survey records.

Key Features

Converts length from Earth's distance from Sun (AU) to US survey link (li).
Uses the exact IAU defined average Earth-Sun distance of 149,597,870,700 meters.
Supports interpretation of historic survey data in civil engineering and land surveying.
Offers conversion in a browser-based, easy-to-use interface.

Examples

1 Earth's distance from Sun equals 743,655,555,555.56 links.
0.5 Earth's distance from Sun equals 371,827,777,777.78 links.

Common Use Cases

Expressing distances within the solar system using astronomical units and linking them to survey data.
Converting historical US land survey lengths for cadastral mapping or land boundary analysis.
Supporting civil engineering projects that require reconciliation of modern measurements with older survey units.

Tips & Best Practices

Ensure to use the mean astronomical unit as defined by the IAU for consistent conversion.
When interpreting historic survey data, be aware of the US survey link's variation compared to modern units.
Use the tool to cross-reference astronomical distances with legacy cadastral records accurately.

Limitations

US survey link is a historical unit and may not precisely align with current metric or imperial units.
Earth's distance from Sun varies slightly due to its elliptical orbit, so conversions use the standard average value.
Slight discrepancies may occur when matching survey data with astronomical units.

Frequently Asked Questions

What is the Earth's distance from the Sun used in this converter?: It uses the astronomical unit defined by the International Astronomical Union as exactly 149,597,870,700 meters, representing the average distance between Earth and the Sun.
What is a US survey link and why is it important?: The US survey link is a historical length unit equal to 1/100 of a Gunter’s chain, used in land surveying and cadastral records in the United States.
Can this tool convert instantaneous Earth-Sun distances?: No, it assumes the mean distance defined by the astronomical unit; instantaneous distances vary and are not accounted for here.

Key Terminology

Astronomical Unit (AU): The average distance between the centers of Earth and the Sun, exactly defined as 149,597,870,700 meters by the IAU.
Link (US survey) [li]: A historical US survey unit equal to 1/100 of a Gunter's chain or approximately 0.201168 meters.
Gunter's Chain: A historic surveying length unit comprised of 66 US survey feet, subdivided into 100 links.

Quick Knowledge Check

What is the unit for Earth's average distance to the Sun called?

Link (US survey)

Astronomical Unit (AU)

Gunter's chain

One US survey link equals what fraction of a Gunter's chain?

1/50

1/100

1/10

Why might the US survey link not perfectly match modern units?

It is a historical unit with slight datum differences

It is defined differently each year

It is identical to the metric metre

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