Kilometers to Astronomical Units Converter
CommonMeters, feet, miles and other distances.
How to convert Kilometers to Astronomical Units
Multiply the kilometers value by 6.6845e-9: 1 km = 6.6845e-9 AU. Going the other way, 1 AU = 1.496e+8 km, so divide by 6.6845e-9 or use the Astronomical Units to Kilometers converter.
About these units
Kilometers (km)
A kilometer is 1,000 meters, the standard unit for road distances and travel in most of the world. One kilometer is about 0.621 miles.
Astronomical Units (AU)
An astronomical unit is the average distance from the Earth to the Sun, defined as exactly 149,597,870.7 kilometers. Distances within the Solar System are usually given in AU.
Kilometers to Astronomical Units conversion table
| Kilometers (km) | Astronomical Units (AU) |
|---|---|
| 1 km | 6.6845e-9 AU |
| 2 km | 1.3369e-8 AU |
| 3 km | 2.0053e-8 AU |
| 4 km | 2.6738e-8 AU |
| 5 km | 3.3422e-8 AU |
| 10 km | 6.6845e-8 AU |
| 20 km | 1.3369e-7 AU |
| 25 km | 1.6711e-7 AU |
| 50 km | 3.3422e-7 AU |
| 100 km | 6.6845e-7 AU |
| 500 km | 3.3422e-6 AU |
| 1,000 km | 6.6845e-6 AU |
More kilometers conversions
- Kilometers to Meters1 km = 1,000 m
- Kilometers to Centimeters1 km = 100,000 cm
- Kilometers to Millimeters1 km = 1e+6 mm
- Kilometers to Micrometers1 km = 1e+9 µm
- Kilometers to Nanometers1 km = 1e+12 nm
- Kilometers to Decimeters1 km = 10,000 dm
- Kilometers to Feet1 km = 3,280.84 ft
- Kilometers to Light Years1 km = 1.057e-13 ly
See every unit on the Length Converter.