A second of arc (arcsecond, arcsec) is 1/60 of an arc minute, 1/3600 of a degree and π/648000 (about 1/206265) of a radian.
Along with the degree,arc minutes and seconds are the most commonly used angular measurement units.
There are 60 arc seconds in an arc minute, 3,600 arc seconds in a degree, and 1,296,000 arc seconds in a circle.
| Standard Units | |
|---|---|
| Centrad | {{centrad}} |
| Degree | {{deg}} |
| Gradians | {{gradians}} |
| Minutes (angular) | {{minutes_angular}} |
| Radians | {{rad}} |
| Sign | {{sign}} |
| Other Units | |
|---|---|
| Milliradians (NATO) | {{milliradians_NATO}} |
| Milliradians (UK) | {{milliradians_UK}} |
| Milliradians (US WW2) | {{milliradians_US_WW2}} |
| Milliradians (USSR) | {{milliradians_USSR}} |