Astronomical units to kilometers Converter

This page allows you to convert length values expressed in astronomical units to their equivalent in kilometers.

Enter the value in astronomical units in the top field (the one marked "au"), then press the "Convert" button or the "Enter" key. The converter also works the other way round: if you enter the value in kilometers in the "km" field, the equivalent value in astronomical units is calculated and displayed in the top field.

Astronomical unit

Astronomical units are used to measure the huge distances in space. One astronomical unit is approximately 149 597 870 691 meters.

Kilometer

A kilometer is another unit of length of the metric system. It's equivalent to 1000 meters.