Direct conversion
Convert arcsecond [arcsec] to radian [rad] instantly with formula, examples, chart, and FAQs.
Quick answer
Use the calculator below for any custom value, then check the formula, examples, chart, and reverse conversion links.
1 arcsecond [arcsec] = 0.000005 radian [rad]
1 arcsecond [arcsec] = 0.000005 radian [rad]
Example: 1 arcsecond [arcsec] equals 0.000005 radian [rad].
Angle conversions use radian as the reference unit. Degree, arcminute, arcsecond, turn, and surveying units are converted through fixed factors.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
The arcsecond (arcsec) is a angle unit used to express measurements in this converter.
HistoryThis unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current useUse arcsecond when comparing angle values, checking specifications, converting between systems, or preparing quick estimates.
The radian is the SI angle unit based on the radius and arc length of a circle.
HistoryRadians became standard in mathematics because they simplify trigonometric formulas and calculus.
Current useRadians are used in mathematics, physics, engineering, programming, rotation, and angular velocity calculations.
| arcsecond [arcsec] | radian [rad] |
|---|---|
| 1 | 0.000005 |
| 2 | 0.00001 |
| 5 | 0.000024 |
| 10 | 0.000048 |
| 20 | 0.000097 |
| 25 | 0.000121 |
| 50 | 0.000242 |
| 100 | 0.000485 |
| 1000 | 0.004848 |
Use this formula: 1 arcsecond [arcsec] = 0.000005 radian [rad] Enter your value in the calculator and the result updates instantly.
1 arcsecond [arcsec] equals 0.000005 radian [rad].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.