How to convert astronomical units to kilometers
1 astronomical unit is equal to 149,597,870.7 kilometers, and 1 kilometer is equal to 6.684587122 × 10⁻⁹ astronomical units. To convert, multiply by the conversion factor:
kilometers = astronomical units × 149,597,870.7
kilometers = astronomical units ÷ 6.684587122 × 10⁻⁹Example: convert 1 au to km: 1 × 149,597,870.7 = 149,597,870.7 km.
Astronomical Unit to Kilometer conversion table
| Astronomical Unit (au) | Kilometer (km) |
|---|---|
| 0.01 au | 1,495,978.707 km |
| 0.1 au | 14,959,787.07 km |
| 1 au | 149,597,870.7 km |
| 2 au | 299,195,741.4 km |
| 3 au | 448,793,612.1 km |
| 5 au | 747,989,353.5 km |
| 10 au | 1,495,978,707 km |
| 20 au | 2,991,957,414 km |
| 50 au | 7,479,893,535 km |
| 100 au | 14,959,787,070 km |
| 250 au | 37,399,467,680 km |
| 500 au | 74,798,935,350 km |
| 1,000 au | 149,597,870,700 km |
About the astronomical unit
The astronomical unit is exactly 149,597,870,700 m, roughly the average distance from Earth to the Sun. It's used for distances within the solar system.
Symbol: au · 1 au = 149,597,870,700 m · Category: Astronomical
About the kilometer
A kilometer is 1,000 meters. It's the standard unit for distances between places, road signs and running races in most countries.
Symbol: km · 1 km = 1,000 m · Category: Metric (SI)