Kilometers to Astronomical Units

Kilometer

A kilometer (km) is a metric unit of length equal to 1,000 meters. It is commonly used to measure long distances such as road lengths, travel routes, and geographic boundaries around the world. Because it is part of the metric system, the kilometer provides a simple and consistent way to scale up from smaller units like meters and centimeters.

Kilometers are especially useful in navigation, sports, and transportation—whether tracking a running route or planning a road trip. Converting kilometers to miles or other units is straightforward, and an online converter ensures fast, accurate results.

Astronomical Unit

An astronomical unit (AU) is a standard space measurement based on the distance from the Earth to the Sun—about 149.6 million kilometers or 93 million miles. It helps describe solar system distances in practical numbers rather than extremely large values.

Astronomers use AU values to measure orbits of planets, asteroids, and comets relative to Earth.