Astronomical unit to Kilometer
Convert Astronomical unit to Kilometer instantly. Free online astronomy unit converter with exact formula, conversion table and FAQ.
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Astronomy Converter
Convert astronomical length, mass, time, and distance units by compatible family.
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Formula
kilometer = astronomical unit × 1.49597871e+8
astronomical unit = kilometer × 6.68458712e-9
Conversion table
| 1 AU | 1.49597871e+8 km |
| 5 AU | 7.47989354e+8 km |
| 10 AU | 1.49597871e+9 km |
| 20 AU | 2.99195741e+9 km |
| 50 AU | 7.47989354e+9 km |
| 100 AU | 1.49597871e+10 km |
| 500 AU | 7.47989354e+10 km |
| 1,000 AU | 1.49597871e+11 km |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the astronomical unit (AU). An astronomical unit (AU) is the mean Earth-Sun distance, about 149.6 million kilometers.
What is the destination unit in this conversion?
The destination unit is the kilometer (km). A kilometer is a metric unit of length equal to 1,000 meters.
How do I convert astronomical unit to kilometer?
Multiply the astronomical unit value by 1.49597871e+8. For example, 10 AU × 1.49597871e+8 = 1.49597871e+9 km.
Is the astronomical unit to kilometer conversion exact?
Yes. Both units have a fixed, defined relationship to the astronomy converter's distance base unit, so the conversion factor is exact rather than a measured approximation.
Where is this conversion commonly used?
It's used in astronomy, physics, and space science whenever a distance value expressed in astronomical unit needs to be compared with, or reported in, kilometer.
Can I convert kilometer back to astronomical unit?
Yes. Multiply the kilometer value by 6.68458712e-9 to get astronomical unit.
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About this conversion
This page converts astronomical unit (AU) to kilometer (km) within the astronomy converter.
An astronomical unit (AU) is the mean Earth-Sun distance, about 149.6 million kilometers.
A kilometer is a metric unit of length equal to 1,000 meters.
The formula is kilometer = astronomical unit × 1.49597871e+8, based on each unit's fixed relationship to the astronomy converter's distance base unit.
The conversion is exact, since it relies on a fixed numerical ratio between the two units rather than a measured or approximate value.
Use the calculator above for instant results, or the table below for common astronomical unit values already converted to kilometer.