KM to AU Conversion Table

View a kilometer to astronomical unit conversion chart with common values, an accurate formula, and related length tables.

Conversion chart

Common kilometers to astronomical units values, generated from the selected units.

kilometers (km)	astronomical units (AU)
1 kilometer	6.68458712e-9 astronomical units
2 kilometers	0.00000001 astronomical units
5 kilometers	0.00000003 astronomical units
10 kilometers	0.00000007 astronomical units
15 kilometers	0.0000001 astronomical units
20 kilometers	0.00000013 astronomical units
25 kilometers	0.00000017 astronomical units
30 kilometers	0.0000002 astronomical units
40 kilometers	0.00000027 astronomical units
50 kilometers	0.00000033 astronomical units
75 kilometers	0.0000005 astronomical units
100 kilometers	0.00000067 astronomical units

Common values

Common kilometers to astronomical units values, generated from the selected units.

kilometers (km)	astronomical units (AU)
1 kilometer	6.68458712e-9 astronomical units
5 kilometers	0.00000003 astronomical units
10 kilometers	0.00000007 astronomical units
20 kilometers	0.00000013 astronomical units
50 kilometers	0.00000033 astronomical units
100 kilometers	0.00000067 astronomical units

Conversion Formula

Divide the value in kilometers by 149597870.7 to get astronomical units.

FormulaAU = km ÷ 149597870.7

Example

Convert 10 kilometers to astronomical units:

10 ÷ 149597870.7= 0.00000007 AU

Frequently asked questions

How many astronomical units are in 1 kilometer?

1 kilometer equals 0.000000006685 astronomical units.

How do you convert kilometers to astronomical units?

Divide the value in kilometers by 149597870.7 to get astronomical units. The formula is AU = km ÷ 149597870.7.

What is 10 kilometers in astronomical units?

10 kilometers is approximately 0.00000007 astronomical units.