Microarcseconds (µas)
The microarcsecond is used for the most precise astrometry and for the Event Horizon Telescope, which imaged the M87 black hole's shadow at about 42 µas.
Convert microarcseconds to any angle unit
1 microarcsecond = 2.7777778 × 10-10 degrees
Quick facts
1 microarcsecond in other units
| Degrees | 2.7777778 × 10-10 ° |
| Radians | 4.8481368 × 10-12 rad |
| Arcminutes | 1.6666667 × 10-8 ′ |
| Arcseconds | 0.000001 ″ |
| Gradians | 3.0864198 × 10-10 grad |
| Milliradians | 4.8481368 × 10-9 mrad |
| Turns | 7.7160494 × 10-13 tr |
| NATO mils | 4.9382716 × 10-9 mil |
What is a microarcsecond?
The microarcsecond is used for the most precise astrometry and for the Event Horizon Telescope, which imaged the M87 black hole's shadow at about 42 µas.
Where the microarcsecond sits among angle units
The microarcsecond is number 1 of 24 on our scale of angle units, ordered from smallest to largest.
Top microarcsecond conversions
Convert microarcseconds to all 23 other units
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Frequently asked questions
What is a microarcsecond?
The microarcsecond is used for the most precise astrometry and for the Event Horizon Telescope, which imaged the M87 black hole's shadow at about 42 µas.
How is the microarcsecond defined?
10⁻⁶ arcsecond.
How many degrees are in a microarcsecond?
One microarcsecond equals 2.7777778e-10 degrees.
How many radians are in a microarcsecond?
One microarcsecond equals 4.8481368e-12 radians.
How many arcminutes are in a microarcsecond?
One microarcsecond equals 1.6666667e-8 arcminutes.