Convert micrometers to astronomical units
1 µm = 0.00000000000000000668458712227 au — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
6.68458712227e-18au
As a fraction: 1/149597870700000000
1 µm = 0.00000000000000000668458712227 au
How to convert micrometers to astronomical units
Multiply the number of micrometers by 0.00000000000000000668458712227 to get astronomical units.
Astronomical unit: Fixed at exactly 149 597 870 700 m by the IAU in 2012.
Micrometer to Astronomical unit conversion table
| Micrometers (µm) | Astronomical units (au) |
|---|---|
| 1 µm | 6.6845871e-18 |
| 2 µm | 1.3369174e-17 |
| 3 µm | 2.0053761e-17 |
| 5 µm | 3.3422936e-17 |
| 10 µm | 6.6845871e-17 |
| 20 µm | 1.3369174e-16 |
| 25 µm | 1.6711468e-16 |
| 50 µm | 3.3422936e-16 |
| 100 µm | 6.6845871e-16 |
| 250 µm | 1.6711468e-15 |
| 500 µm | 3.3422936e-15 |
| 1000 µm | 6.6845871e-15 |
Astronomical unit to Micrometer conversion table
| Astronomical units (au) | Micrometers (µm) |
|---|---|
| 1 au | 1.4959787e+17 |
| 2 au | 2.9919574e+17 |
| 3 au | 4.4879361e+17 |
| 5 au | 7.4798935e+17 |
| 10 au | 1.4959787e+18 |
| 20 au | 2.9919574e+18 |
| 25 au | 3.7399468e+18 |
| 50 au | 7.4798935e+18 |
| 100 au | 1.4959787e+19 |
| 250 au | 3.7399468e+19 |
| 500 au | 7.4798935e+19 |
| 1000 au | 1.4959787e+20 |
Frequently asked
How many astronomical units are in a micrometer?
One micrometer equals 6.684587122e-18 astronomical units (µm → au). That figure is exact, not rounded.
How do you convert micrometers to astronomical units?
Multiply the number of micrometers by 0.00000000000000000668458712227 to get astronomical units.
What is 1 au in micrometers?
One astronomical unit is 1.495978707e+17 micrometers.
What is 10 µm in au?
10 µm = 6.6845871e-17 au.
What exactly is a astronomical unit?
Fixed at exactly 149 597 870 700 m by the IAU in 2012.