Convert astronomical units to km
Astronomical units to kilometers. Enter a value to convert, or use the astronomical units to km chart further down the page.
1 astronomical unit equals 149,597,870.7 kilometers. Going the other way, 1 kilometer = 6.684587122e-9 astronomical units.
How to convert astronomical units to km
To convert astronomical units to kilometers, multiply the astronomical unit value by 149597870.7. You can also divide by 6.684587122e-9 to get the same answer.
km = au × 149597870.7
Worked example
Convert 15 au to kilometers:
15 au = 2,243,968,061 km
astronomical units to km conversion chart
Use this astronomical units to km table for quick reference without typing anything.
| astronomical units (au) | kilometers (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 |
| 1,000 au | 149,597,870,700 km |
What is a astronomical unit?
The astronomical unit is defined as exactly 149,597,870,700 meters, close to the mean Earth–Sun distance.
What is a kilometer?
The kilometer is one thousand meters and is the standard unit for road distances and long-range measurement almost everywhere outside the United States and the United Kingdom.
Frequently asked questions
How many km are in an astronomical unit?
1 astronomical units equals 149,597,870.7 km. Going the other way, 1 km is 6.684587122e-9 astronomical units.
How do you convert astronomical units to km?
To convert astronomical units to kilometers, multiply the astronomical unit value by 149597870.7. You can also divide by 6.684587122e-9 to get the same answer.
What is 10 astronomical units in km?
10 astronomical units equals 1,495,978,707 km. The conversion chart on this page lists the other values people look up most often.
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