How to convert kilometers to astronomical units
1 kilometer is equal to 6.684587122 × 10⁻⁹ astronomical units, and 1 astronomical unit is equal to 149,597,870.7 kilometers. To convert, multiply by the conversion factor:
astronomical units = kilometers × 6.684587122 × 10⁻⁹
astronomical units = kilometers ÷ 149,597,870.7Example: convert 1 km to au: 1 × 6.684587122 × 10⁻⁹ = 6.684587122 × 10⁻⁹ au.
Kilometer to Astronomical Unit conversion table
| Kilometer (km) | Astronomical Unit (au) |
|---|---|
| 0.01 km | 6.684587122 × 10⁻¹¹ au |
| 0.1 km | 6.684587122 × 10⁻¹⁰ au |
| 1 km | 6.684587122 × 10⁻⁹ au |
| 2 km | 1.336917424 × 10⁻⁸ au |
| 3 km | 2.005376137 × 10⁻⁸ au |
| 5 km | 3.342293561 × 10⁻⁸ au |
| 10 km | 6.684587122 × 10⁻⁸ au |
| 20 km | 1.336917424 × 10⁻⁷ au |
| 50 km | 3.342293561 × 10⁻⁷ au |
| 100 km | 6.684587122 × 10⁻⁷ au |
| 250 km | 0.000001671146781 au |
| 500 km | 0.000003342293561 au |
| 1,000 km | 0.000006684587122 au |
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)
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