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] = 149,597,870.7 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 149,597,870.7. The second method multiplies the value in kilometers [km] by the rounded conversion factor of 6.685 * 10-9.

  • Astronomical units [au] = kilometers [km] ÷ 149,597,870.7
  • Astronomical units [au] ≈ kilometers [km] * 6.685 * 10-9

The calculation method with a rounded conversion value is more suitable for rough conversions from kilometers [km] to astronomical units [au], as the calculation result may contain rounding errors. Therefore, the variant with the exact conversion factor is more suitable.


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, whereby the value in astronomical units [au] is multiplied by 149,597,870.7. 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] * 149,597,870.7
  • Kilometers [km] ≈ astronomical units [au] ÷ (6.685 * 10-9)

The rounded conversion value can cause rounding errors, resulting in inaccurate calculation results. To ensure that the conversion from astronomical units [au] to kilometers [km] produces the most accurate calculation result possible, the conversion should be performed using the exact conversion factor.

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

1/8 Inches

Kilometers

Eighth miles

Popular with other users …

Power

Watts, kilowatts, and horsepower are everyday units of power. However, it is also possible to use kilojoules per second, HP, or joules per second. The power converter is ideal for converting between different units of power.

Power converter

Pressure

Hectopascals, millibars, and bars are just a few examples of the many units of pressure. The pressure converter makes conversion a breeze and ensures that the results are accurate and precise.

Pressure converter

Resistance

Electrical resistance is often expressed in ohms or kiloohms. However, it is also possible to use statohms or deciohms. The resistance converter is ideal for converting between different units of resistance.

Resistance converter

Speed

While mph is used in the USA, km/h is the standard in Europe, and seafaring and aviation rely on knots. This speed converter is the perfect tool for accurately converting between various units of speed.

Speed converter