Posted by dellus on Feb 14, 2019; 12:25pm
URL: https://forum.librecad.org/Dimensions-accuracy-tp5716956p5716957.html

Looks as if you don't have any snap on.
If you want to draw using the grid you have to activate "Snap on grid". When doing the dimensions, switch off "Snap on grid", and use preferably "Snap on Endpoints". "Free Snap" is best on always.