How many parsecs is 1 AU?

One AU equals approximately 4.848 x 10-6 parsecs, or 1/206,265 of a parsec. This relationship derives directly from the geometric definition of the parsec.

How many AU are in 1 parsec?

One parsec contains approximately 206,265 AU. This is an exact geometric relationship: 1 parsec is the distance at which 1 AU subtends 1 arcsecond.

Why is the AU-parsec relationship important?

The parsec is defined in terms of AU and parallax angle. When astronomers measure a star's parallax in arcseconds, dividing 1 by the parallax gives the distance directly in parsecs. Each parsec equals 206,265 AU. This makes the conversion fundamental to stellar distance measurement.

Astronomical Units to Parsecs (au to pc) Converter

1 au = 0.000005 pc

1 Astronomical Unit equals 0.000005 Parsecs (1 au = 0.000005 pc). Convert Astronomical Units to Parsecs with formula, table, and examples.

One astronomical unit equals approximately 4.848 x 10^-6 parsecs, or about 4.85 millionths of a parsec. This conversion is fundamental in professional astronomy, linking the solar system distance unit (AU) with the interstellar distance unit (parsec). It derives directly from the geometric definition of the parsec.

How to Convert Astronomical Units to Parsecs

pc = au × 0.0000048481

Multiply the value in Astronomical Units by 0.0000048481

Take your value in Astronomical Units
Multiply by 0.0000048481
Read the result in Parsecs

Common Astronomical Units to Parsecs Conversions

Astronomical Units (au)	Parsecs (pc)	Status
0.1 au	4.84814 × 10⁻⁷ pc
0.39 au	0.000002 pc
0.72 au	0.000003 pc
1 au	0.000005 pc
1.52 au	0.000007 pc
5.2 au	0.00003 pc
9.5 au	0.00005 pc
19.2 au	0.0001 pc
30 au	0.0001 pc
39.5 au	0.0002 pc
100 au	0.0005 pc
1,000 au	0.0048 pc
10,000 au	0.0485 pc
100,000 au	0.4848 pc
206,265 au	1 pc

Good to Know About Astronomical Units to Parsecs Conversion

The AU-parsec relationship is where solar system science meets stellar astronomy. It is the bridge between Kepler's laws (which use AU) and stellar parallax measurements (which yield parsecs). Every astrophysicist learns this conversion early in their career.

Astronomical Units to Parsecs: What You Need to Know

By definition, a parsec is the distance at which 1 AU subtends an angle of 1 arcsecond. This means 1 parsec = 206,265 AU. The nearest star, Proxima Centauri, is about 1.30 parsecs (268,332 AU) away. This AU-to-parsec conversion is one of the most frequently used in professional astrophysics.

What is a Astronomical Unit? au

Exactly 149,597,870,700 meters by IAU 2012 definition. Roughly the average distance from the Earth to the Sun. Used for distances within our solar system.

Astronomical solar system distances astronomy planetary science

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What is a Parsec? pc

The distance at which one astronomical unit subtends an angle of one arcsecond. Approximately 3.26 light-years or 30.857 trillion kilometers. The standard unit in professional astronomy.

Astronomical professional astronomy galactic distances

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Going the other way? Use our Parsecs to Astronomical Units converter.

Astronomical Units to Parsecs FAQ

One AU equals approximately 4.848 x 10^-6 parsecs, or 1/206,265 of a parsec. This relationship derives directly from the geometric definition of the parsec.
One parsec contains approximately 206,265 AU. This is an exact geometric relationship: 1 parsec is the distance at which 1 AU subtends 1 arcsecond.
The parsec is defined in terms of AU and parallax angle. When astronomers measure a star's parallax in arcseconds, dividing 1 by the parallax gives the distance directly in parsecs. Each parsec equals 206,265 AU. This makes the conversion fundamental to stellar distance measurement.

Non-Frequently Asked Questions About Astronomical Units to Parsecs

Questions nobody should ask - but someone did.

Much bigger. 1 parsec = 206,265 AU. A parsec is the distance at which 1 AU subtends 1 arcsecond of angle. Think of it this way: if 1 AU is a step, 1 parsec is a 200-kilometer hike.