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Astronomical Unit Conversions

The astronomical unit is exactly 149,597,870,700 m, roughly the average distance from Earth to the Sun. It's used for distances within the solar system.

1 au = 149,597,870,700 m

Convert astronomical units to other units

Each line shows how much 1 astronomical unit (au) equals. Select a conversion for a calculator, formula and table.

Metric (SI)

Imperial & US customary

US survey units

Nautical

Astronomical

Atomic & physics

Historical & cloth

Typography

Convert other units to astronomical units