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.
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Show this value in all 50 length units
- Gigameters Gm 1e-15
- Megameters Mm 1e-12
- Kilometers km 1e-9
- Hectometers hm 1e-8
- Decameters dam 0.000 000 1
- Meters m 0.000 001
- Decimeters dm 0.000 01
- Centimeters cm 0.0001
- Millimeters mm 0.001
- Micrometers µm 1
- Nanometers nm 1000
- Picometers pm 1 000 000
- Femtometers fm 1 000 000 000
- Inches in 0.000 039 370 078 740 2
- Feet ft 0.000 003 280 839 895 01
- Yards yd 0.000 001 093 613 298 34
- Miles mi 6.21371192237e-10
- Nautical miles nmi 5.39956803456e-10
- Thous thou 0.039 370 078 740 2
- Hands hh 0.000 009 842 519 685 04
- Links li 0.000 004 970 969 537 9
- Spans span 0.000 004 374 453 193 35
- Cubits cubit 0.000 002 187 226 596 68
- Ells ell 0.000 000 874 890 638 67
- Fathoms ftm 0.000 000 546 806 649 169
- Rods rd 0.000 000 198 838 781 516
- Chains ch 4.9709695379e-8
- Furlongs fur 4.9709695379e-9
- Leagues lea 2.07123730746e-10
- Barleycorns barleycorn 0.000 118 110 236 22
- US survey feet ft (US) 0.000 003 280 833 333 33
- US survey miles mi (US) 6.21369949495e-10
- Ångströms Å 10 000
- Microns µ 1
- Bohr radiuss a₀ 18 897.261 259 1
- Planck lengths ℓₚ 6.18714249917e+28
- Astronomical units au 6.68458712227e-18
- Light-years ly 1.05700083402e-22
- Light-seconds ls 3.33564095198e-15
- Light-minutes lmin 5.55940158664e-17
- Parsecs pc 3.24077928944e-23
- Kiloparsecs kpc 3.24077928944e-26
- Megaparsecs Mpc 3.24077928944e-29
- Solar radiuss R☉ 1.43740117867e-15
- Earth radiuss R🜨 1.56961230576e-13
- Point (DTP)s pt 0.002 834 645 669 29
- Picas pc 0.000 236 220 472 441
- Scandinavian miles mil 1e-10
- Versts вер 9.37382827147e-10
- Lis 里 2e-9
Every row is Micrometer (µm) converted through the meter, in exact rational arithmetic.
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.