Kilometers to Astronomical Units Converter

Enter a value to calculate the result instantly and free of charge.

km
6.68458712227AU

1E9 km = 6.68458712227 AU

Conversion summary

1 km = 6.68458712e-9 AU

Formula
Astronomical Unit = Kilometer ÷ 149,597,870.7
Category
Length
Units
km → AU

1,000,000,000 km in other units

Values update with the converter above. Select a row to open that conversion's detailed page.

Metric

  • Meter1,000,000,000,000 m
  • Centimeter100,000,000,000,000 cm
  • Decimeter10,000,000,000,000 dm
  • Millimeter1E15 mm
  • Micrometer1E18 µm
  • Nanometer1E21 nm
  • Picometer1E24 pm

US / Imperial

Traditional and regional

  • Arshin1,470,588,000,000 arshin
  • Endaze1,538,462,000,000 endaze
  • Byzantine Foot3,176,620,000,000 pus
  • Byzantine Fathom529,436,700,000 orgyia
  • Cig3,003,003,000,000 cig

Scientific

How do you convert kilometers to astronomical units?

To convert kilometers to astronomical units, divide the number of kilometers by 149,597,870.7. 1 km = 6.6846e-9 AU.

Conversion formula

Astronomical Unit = Kilometer ÷ 149,597,870.7

Kilometers to astronomical units conversion table

Kilometers (km)Astronomical Units (AU)
1,000,000 km0.00668459 AU
50,000,000 km0.334229 AU
149,597,870 km1 AU
500,000,000 km3.34229 AU
1.00000000e+9 km6.68459 AU

What is Kilometer?

The kilometer is a unit of length equal to 1,000 meters. It is commonly used for roads, cities and geographical distances.

Short history of Kilometer

The kilometer emerged naturally within the decimal metric system and became a standard way to express larger terrestrial distances.

Open the Kilometer unit guide

What is Astronomical Unit?

Astronomical Unit is a length unit used to express distance, size or travel range in practical measurement work.

Short history of Astronomical Unit

Astronomical Unit became established as a practical length unit in technical, commercial or scientific use.

Open the Astronomical Unit unit guide

Frequently asked questions

What is 1 Kilometer in Astronomical Unit?

1 km = 6.68458712e-9 AU. Enter another value in the converter to calculate its equivalent instantly.

How do you convert Kilometer to Astronomical Unit?

To convert kilometers to astronomical units, divide the number of kilometers by 149,597,870.7. 1 km = 6.6846e-9 AU.

How precise are the results?

Conversion results are calculated to 12 significant figures. Very large or very small values are shown in scientific notation.

Is the Kilometer to Astronomical Unit converter free?

Yes. The conversion tool on BirimCeviri.app is free and requires no sign-up.

Length conversion tools

Browse every converter in this group: Length Units and Conversions.

Reverse conversion

Astronomical Units to kilometers converter

Related conversions

Frequently asked questions

How many astronomical units are in 1 kilometer?

1 km = 6.6846e-9 AU.

How do you convert kilometers to astronomical units?

To convert kilometers to astronomical units, divide the number of kilometers by 149,597,870.7. 1 km = 6.6846e-9 AU.

How many kilometers are in 1 astronomical unit?

1 AU = 149,598,000 km.

Sources

The definitions and conversion relationships on this page are aligned with standard metrology and SI reference material.

  1. BIPM: The International System of Units (SI Brochure)
  2. NIST: SI Units – Length
  3. NIST: Guide for the Use of the International System of Units

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