Inch to Astronomical Unit Converter
Convert Inch (in) to Astronomical Unit (AU) instantly. 1 in = 1.697885e-13 AU.
Length Converter
31 units available
1 in = 1.697885e-13 AU
Formula:
AU = in × 1.697885e-13With your value: 1 in = 1.697885e-13 AU
How big is that?
Everyday references on a logarithmic scale, all expressed in inch so you can sanity-check the result.
Other Inch to Astronomical Unit conversions
Inch to Astronomical Unit Conversion Table
| Inch (in) | Astronomical Unit (AU) |
|---|---|
| 0.5 | 8.489426e-14 |
| 1 | 1.697885e-13 |
| 2 | 3.395770e-13 |
| 5 | 8.489426e-13 |
| 10 | 1.697885e-12 |
| 15 | 2.546828e-12 |
| 20 | 3.395770e-12 |
| 25 | 4.244713e-12 |
| 50 | 8.489426e-12 |
| 100 | 1.697885e-11 |
| 250 | 4.244713e-11 |
| 500 | 8.489426e-11 |
| 1000 | 1.697885e-10 |
Astronomical Unit to Inch Conversion Table
| Astronomical Unit (AU) | Inch (in) |
|---|---|
| 0.5 | 2.944840e+12 |
| 1 | 5.889680e+12 |
| 2 | 1.177936e+13 |
| 5 | 2.944840e+13 |
| 10 | 5.889680e+13 |
| 15 | 8.834520e+13 |
| 20 | 1.177936e+14 |
| 25 | 1.472420e+14 |
| 50 | 2.944840e+14 |
| 100 | 5.889680e+14 |
| 250 | 1.472420e+15 |
| 500 | 2.944840e+15 |
| 1000 | 5.889680e+15 |
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.
Inch (in)
Length
1 inch = 25.4 mm exactly, fixed by the 1959 international yard and pound agreement.
Source: International Yard and Pound Agreement of 1959; NIST Federal Register Notice 59-5442
US, UK, Canada, Australia, New Zealand, South Africa · Reviewed 2026-07-01
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
How to Convert Inch to Astronomical Unit
To convert from Inch (in) to Astronomical Unit (AU), multiply the value by 1.697885e-13.
Formula: AU = in × 1.697885e-13
Reverse: in = AU × 5.889680e+12
Step-by-Step Example
- Start with your value in Inch. For example: 5 in
- Multiply by the conversion factor: 5 x 1.697885e-13
- The result is: 8.489426e-13 AU
About Inch
The inch is an imperial unit equal to 1/12 of a foot or 2.54 centimeters. It is widely used in the US and UK for small measurements.
Fun Fact: The inch was historically defined as the width of a man's thumb.
Common uses: screen sizes, construction, clothing.
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.
Frequently Asked Questions
How many Astronomical Unit are in 1 Inch?
There are exactly 1.697885e-13 Astronomical Unit in 1 Inch. This means the conversion factor from Inch to Astronomical Unit is 1.697885e-13.
What is the formula to convert Inch to Astronomical Unit?
The formula to convert Inch to Astronomical Unit is: AU = in × 1.697885e-13. For example, to convert 10 Inch to Astronomical Unit, you would multiply 10 by 1.697885e-13.
What is a Inch?
The inch is an imperial unit equal to 1/12 of a foot or 2.54 centimeters. It is widely used in the US and UK for small measurements.
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 are the common uses of Inch?
The Inch is commonly used in screen sizes, construction, clothing.
Related Length Conversions
Cite this page
UnitConvertLab. (2026). Inch to Astronomical Unit converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/inch-to-astronomical_unit