Thanks all for the help, i started with a new model and i rescaled at once. Now my house is standing, all measures are correct.

Thanks for the replies, but unfortunately I am still stuck.
See my attachment.

I moved the walls with push/pull, entered 585 cm as height, entered and when i check with the tape measure it says 637,7 cm

Just to explain better: I drew the surface on scale. Maybe this has something to do with it?
For the moment I am still using the free SketchUp Pro 2022.

3D view.skp

Hi all,

i just finished a crash course and i am now working on my first model. I noticed that when a make a rectangle and i change the dimensions by typing the numbers, the measurements change slightly. When i recheck with my tape measure, indeed the dimensions aren't as i typed.

How can i fix this (or what am i doing wrong?)

Thanks!