## Measurement unit: square astronomical unit

**Full name:** square astronomical unit

**Plural form:** square astronomical units

**Category type:** area

**Scale factor:** 2.2379523E+22

## SI unit: square meter

The SI derived unit for area is the square meter.

1 square meter is equal to 4.4683704831421E-23 square astronomical unit.

Valid units must be of the **area** type.

You can use this form to select from known units:

## Definition: Square astronomical unit

A square astronomical unit is defined as the area of a square
with sides one astronomical unit in length.

The definition of a astronomical unit is as follows:

The astronomical unit (AU or au or a.u. or sometimes ua) is a unit of length. It is approximately equal to the mean distance between the Earth and Sun. The currently accepted value of the AU is 149 597 870 691 ± 30 metres (about 150 million kilometres or 93 million miles).

The symbol "ua" is recommended by the Bureau International des Poids et Mesures, but in the United States and other anglophone countries the reverse usage is more common. The International Astronomical Union recommends "au" and international standard ISO 31-1 uses "AU".

## Sample conversions: square astronomical unit