Kilometers to astronomical units
Type a value in km to get it in AU instantly.
6.685×10⁻⁹AU
Nothing on our list is smaller: the Moon is 384,400× further. Light takes about 5.559×10⁻⁸ minutes to cross it.
Convert the other way: AU to km
What it means
How far is that?
One astronomical unit is defined as exactly 149,597,870,700 m, and a light-year uses the Julian year of 365.25 days.
The math
How to convert km to AU
To convert kilometers to astronomical units, multiply by 6.685×10⁻⁹.
Example: 1 km × 6.685×10⁻⁹ = 6.685×10⁻⁹ AU.
In the other direction, 1 AU = 149,598,000 km.
Every unit
Your distance in every unit
Tables
km to AU conversion table
| km | AU |
|---|---|
| 0.1 km | 6.685×10⁻¹⁰ AU |
| 0.5 km | 3.342×10⁻⁹ AU |
| 1 km | 6.685×10⁻⁹ AU |
| 2 km | 1.337×10⁻⁸ AU |
| 5 km | 3.342×10⁻⁸ AU |
| 10 km | 6.685×10⁻⁸ AU |
| 25 km | 1.671×10⁻⁷ AU |
| 50 km | 3.342×10⁻⁷ AU |
| 100 km | 6.685×10⁻⁷ AU |
| 500 km | 3.342×10⁻⁶ AU |
| 1,000 km | 6.685×10⁻⁶ AU |
AU to km conversion table
| AU | km |
|---|---|
| 0.1 AU | 14,959,800 km |
| 0.5 AU | 74,798,900 km |
| 1 AU | 149,598,000 km |
| 2 AU | 299,196,000 km |
| 5 AU | 747,989,000 km |
| 10 AU | 1.496×10⁹ km |
| 25 AU | 3.74×10⁹ km |
| 50 AU | 7.48×10⁹ km |
| 100 AU | 1.496×10¹⁰ km |
| 500 AU | 7.48×10¹⁰ km |
| 1,000 AU | 1.496×10¹¹ km |
Quick answers
Quick answers
- How many AU is 1 km?
- 1 km is 6.685×10⁻⁹ AU.
- How many AU is 10 km?
- 10 km is 6.685×10⁻⁸ AU.
The units
About these units
Kilometers (km)
Kilometers, which run out of usefulness beyond the planets.
Astronomical units (AU)
The Earth–Sun distance, fixed at 149,597,870,700 m. The ruler of the solar system.
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