Kilometers to astronomical unit (km to AU) converter

You can enter a value in either the kilometers (km) or astronomical unit (AU) input fields. For an understanding of the conversion process, we include algebraic formulas.

See conversions to common Length units and easily switch Length units in the two tabbed section below. Use the search bar above to find additional conversions.

Tip: Click the "Swap" button to switch from converting kilometers to astronomical unit to astronomical unit to kilometers.

kilometers (km)

 

astronomical unit (AU)

 
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1 km = 1.0E-8 AU 1 AU = 149598073 km

Algebraic Steps / Dimensional Analysis Formula
km * 100000 cm
1 km		 * 1 in
2.54 cm		 * 1 AU
5889679948400 in		 = AU

Direct Conversion Formula
km * 1 AU
149598073 km		 = AU

If you would like to switch between Length units, select from the tables below

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