Kilometers to Astronomical Units

Convert kilometers (km) to au (AU) with formulas, examples, and conversion tables.

km
AU
1 kilometers (km) = 6.68458712227e-9 au (AU)
Round to:
Step-by-Step Solution
1Write the conversion factor:
1 astronomical unit = 149597870.7 kilometers
2Divide the value by the conversion factor:
1 ÷ 149597870.7 = 6.68458712227e-9
3Result:
1 kilometers (km) = 6.68458712227e-9 au (AU)
↔ Astronomical Units to Kilometers

How to Convert kilometers to au

To convert kilometers to au, divide the value by 149597870.7.

The Formula

au = kilometers ÷ 149597870.7

Key Fact

1 astronomical unit = 149597870.7 kilometers

Tip: To convert au back to kilometers, multiply by 149597870.7.

kilometers to au Table

kilometersau
1 km6.68458712227e-9 AU
2 km1.33691742445e-8 AU
5 km3.34229356113e-8 AU
10 km6.68458712227e-8 AU
20 km1.33691742445e-7 AU
25 km1.67114678057e-7 AU
50 km3.34229356113e-7 AU
100 km6.68458712227e-7 AU
250 km1.67114678057e-6 AU
500 km3.34229356113e-6 AU
1000 km6.68458712227e-6 AU

1 kilometer in Other Units

Unit1 km =
Kilometers to Meters1000 m
Kilometers to Astronomical Units6.68458712227e-9 AU
Kilometers to Light Years1.05700083402e-13 ly
Kilometers to Parsecs3.24077928944e-14 pc
Kilometers to Kiloparsecs3.24077928944e-17 kpc
Kilometers to Megaparsecs3.24077928944e-20 Mpc
Kilometers to Light Seconds3.33564095198e-6 ls
Kilometers to Light Minutes5.55940158664e-8 lm
Kilometers to Miles0.621371192237 mi

Related Conversions

Light Years to KilometersKilometers to Light YearsLight Years to ParsecsParsecs to Light YearsAstronomical Units to KilometersLight Years to AUAU to Light Years