Astronomical Unit to Chain Converter
Convert Astronomical Unit (AU) to Chain (ch) instantly. 1 AU = 7,436,464,581.842042 ch.
Length Converter
31 units available
1 AU = 7,436,464,581.842042 ch
Formula:
ch = AU × 7.436465e+9With your value: 1 AU = 7,436,464,581.842042 ch
How big is that?
Everyday references on a logarithmic scale, all expressed in astronomical unit so you can sanity-check the result.
Other Astronomical Unit to Chain conversions
Astronomical Unit to Chain Conversion Table
| Astronomical Unit (AU) | Chain (ch) |
|---|---|
| 0.5 | 3,718,232,290.921021 |
| 1 | 7,436,464,581.842042 |
| 2 | 14,872,929,163.684084 |
| 5 | 37,182,322,909.21021 |
| 10 | 74,364,645,818.42043 |
| 15 | 111,546,968,727.63063 |
| 20 | 148,729,291,636.84085 |
| 25 | 185,911,614,546.05103 |
| 50 | 371,823,229,092.10205 |
| 100 | 743,646,458,184.2041 |
| 250 | 1.859116e+12 |
| 500 | 3.718232e+12 |
| 1000 | 7.436465e+12 |
Chain to Astronomical Unit Conversion Table
| Chain (ch) | Astronomical Unit (AU) |
|---|---|
| 0.5 | 6.723625e-11 |
| 1 | 1.344725e-10 |
| 2 | 2.689450e-10 |
| 5 | 6.723625e-10 |
| 10 | 1.344725e-9 |
| 15 | 2.017088e-9 |
| 20 | 2.689450e-9 |
| 25 | 3.361813e-9 |
| 50 | 6.723625e-9 |
| 100 | 1.344725e-8 |
| 250 | 3.361813e-8 |
| 500 | 6.723625e-8 |
| 1000 | 1.344725e-7 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Astronomical Unit (AU)
Length
The astronomical unit is exactly 149 597 870 700 m (IAU Resolution B2, 2012).
Source: IAU Resolution B2 (2012) — definition of the astronomical unit; IAU B2 (2015) nominal values
International Astronomical Union · Reviewed 2026-07-01
Chain (ch)
Length
Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Astronomical Unit to Chain
To convert from Astronomical Unit (AU) to Chain (ch), multiply the value by 7,436,464,581.842041.
Formula: ch = AU × 7.436465e+9
Reverse: AU = ch × 1.344725e-10
Step-by-Step Example
- Start with your value in Astronomical Unit. For example: 5 AU
- Multiply by the conversion factor: 5 x 7,436,464,581.842041
- The result is: 37,182,322,909.21021 ch
About Astronomical Unit
The astronomical unit (AU) is defined as exactly 149,597,870,700 metres, close to the mean Earth–Sun distance. It is the natural yardstick for the Solar System.
Common uses: planetary science, orbital mechanics, astronomy.
About Chain
Gunter's chain equals 66 feet (20.1168 m) and underpins the US Public Land Survey System: 10 square chains make one acre.
Common uses: land surveying, cadastral records, cricket pitch length.
Frequently Asked Questions
How many Chain are in 1 Astronomical Unit?
There are exactly 7,436,464,581.842041 Chain in 1 Astronomical Unit. This means the conversion factor from Astronomical Unit to Chain is 7,436,464,581.842041.
What is the formula to convert Astronomical Unit to Chain?
The formula to convert Astronomical Unit to Chain is: ch = AU × 7.436465e+9. For example, to convert 10 Astronomical Unit to Chain, you would multiply 10 by 7,436,464,581.842041.
What is a Astronomical Unit?
The astronomical unit (AU) is defined as exactly 149,597,870,700 metres, close to the mean Earth–Sun distance. It is the natural yardstick for the Solar System.
What is a Chain?
Gunter's chain equals 66 feet (20.1168 m) and underpins the US Public Land Survey System: 10 square chains make one acre.
What are the common uses of Astronomical Unit?
The Astronomical Unit is commonly used in planetary science, orbital mechanics, astronomy.
Related Length Conversions
Cite this page
UnitConvertLab. (2026). Astronomical Unit to Chain converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/astronomical_unit-to-chain