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Convert Astronomical Unit (au) to Millimeter (mm)

Please provide values below to convert Astronomical Unit (au) to Millimeter (mm).
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      Updated on September 1, 2025

      About Astronomical Unit (au) to Millimeter (mm) Conversion Calculator

      Written By
      author
      Nadiba Rahman
      Reviewed by
      author
      Mrinmoy Roy
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      You can use our Astronomical Unit (au) to Millimeter (mm) conversion calculator as a reliable and efficient tool to simplify length conversions. It is designed for professionals, students, and anyone who needs a quick and accurate result. Conversion of Astronomical Unit (au) to Millimeter (mm) is crucial in Astronomy related measurements. You can avoid the risk of manual calculation errors and save valuable time using our Astronomical Unit (au) to Millimeter (mm) converter.

      Relation Between Astronomical Unit (au) and Millimeter (mm)

      Let me explain to you about the relation between Astronomical Unit au and Millimeter (mm) first before moving to the conversion process. Because it’s essential to grasp what these units represent.

      What is Astronomical Unit (au)?

      An astronomical unit (AU) is the average distance between the Earth and the Sun, approximately 149.6 million kilometers. Astronomical Unit (au) is a unit of length measurement which is commonly used in Astronomy. Used in astronomy for measuring distances within the solar system. Essential for understanding planetary orbits. 1 AU = ~8.3 light minutes..

      What is Millimeter (mm)?

      Astronomical Unit (au) is another unit of length measurement that is used in Nanoengineering. A millimeter is a unit of length equal to 10−3 meters.. Used in astronomy for measuring distances within the solar system. Essential for understanding planetary orbits. 1 AU = ~8.3 light minutes..

      How to Convert Millimeter (mm)?

      The conversion between Astronomical Unit (au) and Millimeter (mm) follows a simple formula:

      Astronomical Unit = Astronomical Unit × 149597870700000

      Where, 149597870700000 is the value that allows you to convert between Astronomical Unit (au) and Millimeter (mm).

      So,

      1 Millimeter = 149597870700000 Astronomical Unit

      And, 1 Astronomical Unit = 1/149597870700000 Millimeter
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      Examples of Converting Astronomical Unit (au) to Millimeter (mm)

      To convert any value from Astronomical Unit (au) to Millimeter (mm), simply multiply the amount of Astronomical Unit (au) by the conversion factor:

      1 Millimeter = 149597870700000 Astronomical Unit

      For example, if you want to convert 5 Astronomical Unit into Millimeter and the conversion factor is 149597870700000, then:

      5 Astronomical Unit = 5 x 149597870700000 Millimeter

      Astronomical Unit (au) to Millimeter (mm) Conversion Chart

      Here’s a quick reference chart for common conversions between Astronomical Unit (au) and Millimeter (mm)
      Astronomical Unit (au)Millimeter (mm)
      1 Astronomical Unit (au)149597870700000 Millimeter (mm)
      6 Astronomical Unit (au)897587224200000 Millimeter (mm)
      11 Astronomical Unit (au)1645576577700000 Millimeter (mm)
      16 Astronomical Unit (au)2393565931200000 Millimeter (mm)
      21 Astronomical Unit (au)3141555284700000 Millimeter (mm)
      26 Astronomical Unit (au)3889544638200000 Millimeter (mm)
      31 Astronomical Unit (au)4637533991700000 Millimeter (mm)
      36 Astronomical Unit (au)5385523345200000 Millimeter (mm)
      41 Astronomical Unit (au)6133512698700000 Millimeter (mm)
      46 Astronomical Unit (au)6881502052200000 Millimeter (mm)
      You can use the above chart for quick and easy reference.

      How 1 Astronomical Unit (au) Converts to Other length Units

      See the relation between Astronomical Unit (au) and other length related measurement units:
      1 Astronomical Unit(au)1.495978707e+21 Angstrom (Å)
      1 Astronomical Unit(au)807763880.669546 Cables
      1 Astronomical Unit(au)14959787070000.000000 Centimeter (cm)
      1 Astronomical Unit(au)1495978707000.000000 Decimeter (dm)
      1 Astronomical Unit(au)130881776640.419952 Ells (ells)
      1 Astronomical Unit(au)129252560284800.000000 Ems (ems)
      1 Astronomical Unit(au)81801110400.262466 Fathom
      1 Astronomical Unit(au)490806662401.574768 Foot (ft)
      1 Astronomical Unit(au)743646458.184204 Furlong
      1 Astronomical Unit(au)1472419987204.724365 Hand
      1 Astronomical Unit(au)1495978707000.000000 Hectometer (hm)
      1 Astronomical Unit(au)5889679948818.897461 Inch (in)
      1 Astronomical Unit(au)149597870700.000000 Kilometer (km)
      1 Astronomical Unit(au)0.000016 Light Year (ly)
      1 Astronomical Unit(au)149597870700.000000 Meter (m)
      1 Astronomical Unit(au)149597870700000000.000000 Micrometer (µm)
      1 Astronomical Unit(au)5889679948818897.000000 Mil (mil)
      1 Astronomical Unit(au)92955807.273026 Mile (mi)
      1 Astronomical Unit(au)149597870699999985664.000000 Nanometer (nm)
      1 Astronomical Unit(au)0.000005 Parsec (pc)
      1 Astronomical Unit(au)1.495978707e+23 Picometer (pm)
      1 Astronomical Unit(au)5889679948818897.000000 Thou
      1 Astronomical Unit(au)163602220800.524933 Yard (yd)

      Features of Our Astronomical Unit (au) to Millimeter (mm) Conversion Calculator

      Our Astronomical Unit au to Millimeter (mm) converter is more than just a basic converter. Here's what makes it stand out:

      Output Precision Control

      You can control how precise your conversion results are. From settings, you can adjust decimal places from 0 to 12 places.

      Customizable Rounding Options

      You can control the output rounding options based on your necessity. You can turn the rounding mode on or off, and select between Ceiling or Floor rounding to match your needs.

      Multiple Number Formats

      Display your results the way you want:
      1. Standard format (e.g. 12.345245)
      2. Scientific notation (e.g. 1.23452e+1)
      3. Engineering format (e.g. 1.23452 × 10^1)

      Integrated Scientific Calculator

      We know you need to switch between a unit converter and a general calculator back and forth. To minimize your hassle, our Astronomical Unit au to Millimeter (mm) converter comes up with an integrated scientific calculator.

      Conversion History Tracking

      You can always review your past length conversions and go to them whenever you like. It stores your most recent 10 unit conversions.

      Thousand Separators Toggle

      Our Astronomical Unit au to Millimeter (mm) converter improves the output readability by toggling the thousand separators “On”. It’s useful when you work with large numbers.

      Conclusion

      Now, you understand how to convert Astronomical Unit au to Millimeter (mm) manually. But you can bypass the manual calculation using our length conversion calculator. This allows you to get faster and accurate results in Millimeter (mm), which you can use in Astronomy related measurements. With the help of our integrated scientific calculator, calculation history tracking, and precision control, our Astronomical Unit au to Millimeter (mm) converter is your swiss army knife for daily calculations.
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