Kilometer to Astronomical unit Converter (and vice versa)

Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026

This converter allows you to convert kilometers [km] to astronomical units [au] or astronomical units [au] to kilometers [km]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.

1 kilometer [km] ≈ 6.685 * 10-9 astronomical units [au]1 astronomical unit [au] ≈ 1.496 * 108 kilometers [km]

Convert kilometers to astronomical units

There are two simple ways to convert kilometers [km] to astronomical units [au]. In the first calculation method, the value in kilometers [km] is divided by the rounded conversion factor of 1.496 * 108. The second method multiplies the value in kilometers [km] by the rounded conversion factor of 6.685 * 10-9.

  • Astronomical units [au] ≈ kilometers [km] ÷ (1.496 * 108)
  • Astronomical units [au] ≈ kilometers [km] * 6.685 * 10-9

When converting with rounded conversion values, it must be taken into account that the calculation result may contain rounding errors. For a precise conversion of kilometers [km] to astronomical units [au], the converter should be used.


Convert astronomical units to kilometers

Converting astronomical units [au] to kilometers [km] is easy and can be done in two ways. The first method involves multiplication, in which the value in astronomical units [au] is multiplied by the rounded conversion factor of 1.496 * 108. The second variant is a division. Here, the value in astronomical units [au] is divided by the rounded conversion factor of 6.685 * 10-9.

  • Kilometers [km] ≈ astronomical units [au] * 1.496 * 108
  • Kilometers [km] ≈ astronomical units [au] ÷ (6.685 * 10-9)

Rounded conversion values can cause inaccuracies in the calculation result. To avoid unwanted calculation errors when converting astronomical units [au] to kilometers [km], the converter should be used.

Converter

Decimal places

How it's calculated

Factor: 
149,597,870.7
Kilometers=Astronomical units*149,597,870.7
Astronomical units=
Kilometers149,597,870.7

To all available units

Kilometers

Cable lengths

Kilometers

Chains

Kilometers

Decameters

Kilometers

⅛ Inches

Kilometers

Eighth miles

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