Posted by dellus on May 17, 2023; 11:58am
URL: https://forum.librecad.org/radius-is-not-equalling-the-correct-diameter-tp5722812p5722813.html

@10,30 as the radius - it should read @10.30,0 if you want to get 20.60 as diameter.
Still, if I try it your way I don't get 20.88 but 60.2456.
So I guess you just don't have proper snaps on when measuring so the points are not caught exactly.
Activate Snap on Endpoints, also it is advisable to have Free Snap on.