Astronomical Unit

au

Mean Earth-Sun distance

About Astronomical Unit (au)

Originally based on Earth's mean distance from the Sun, the astronomical unit (AU) was fixed in 2012 at exactly 149,597,870,700 meters. Planetary scientists use AUs to express distances within the solar system: Mars orbits at about 1.52 AU, Jupiter at 5.2 AU, and the outer edge of the Kuiper Belt at roughly 50 AU.

Category
Length
Symbol
au
Also known as
AU astronomical units ua
01

CONVERT TO

Meter m Kilometer km Centimeter cm Millimeter mm Micrometer µm Nanometer nm Mile mi Yard yd Foot ft Inch in Nautical Mile nmi Light-year ly Fathom ftm Furlong fur Chain ch Rod rd League lea Thou th Parsec pc

Frequently Asked Questions

What is a Astronomical Unit (au)?

Mean Earth-Sun distance

How many Meter (m) are in one Astronomical Unit (au)?

One Astronomical Unit (au) equals 149,597,870,700 Meter (m).

How many Kilometer (km) are in one Astronomical Unit (au)?

One Astronomical Unit (au) equals 149,597,870.7 Kilometer (km).

How many Centimeter (cm) are in one Astronomical Unit (au)?

One Astronomical Unit (au) equals 14,959,787,070,000 Centimeter (cm).

How do I convert Astronomical Unit to Meter?

To convert Astronomical Unit to Meter, multiply the value by 149,597,870,700 (1 au = 149,597,870,700 m).