1 arcsecond to radians
1 ″ = 0.00000485 rad. Change the amount below, or read the formula and the reference table further down.
1 arcsecond equals
radians
1 ″ = 0.00000485 rad
The formula
Arcseconds and radians both measure angle from the same zero, so a single multiplier does the job.
rad = ″ × 0.0000048481
Going the other way? Convert radians to arcseconds.
Arcseconds to radians table
Values either side of 1 ″.
| Arcseconds (″) | Radians (rad) |
|---|---|
| -4 | -0.000019 |
| -3.5 | -0.000017 |
| -3 | -0.000015 |
| -2.5 | -0.000012 |
| -2 | -0.00001 |
| -1.5 | -0.000007 |
| -1 | -0.000005 |
| -0.5 | -0.000002 |
| 0 | 0 |
| 0.5 | 0.000002 |
| 1 | 0.000005 |
| 1.5 | 0.000007 |
| 2 | 0.00001 |
| 2.5 | 0.000012 |
| 3 | 0.000015 |
| 3.5 | 0.000017 |
| 4 | 0.000019 |
| 4.5 | 0.000022 |
| 5 | 0.000024 |
| 5.5 | 0.000027 |
| 6 | 0.000029 |
Questions people ask
- How many radians are in a arcsecond?
- One arcsecond equals 0.0000048481 radians.
- How do I convert arcseconds to radians by hand?
- Multiply the number of arcseconds by 0.0000048481. For a rough check, 0 is close enough for most everyday use.
- What is 1 arcsecond in radians?
- 1 arcsecond is 0.00000485 radians.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.