Problem with units

[Ivan_m]

Hi

I have a question regarding the drawing units in AutoCAD. I was given a drawing in which the drawing units were architectural and in the field "Insertion scale" it says "Inches". The floorplans and the facades are both in centimeters and when I imported the situation (which is in architectural units as I said previously) they don't match each other. How can I convert arch. units in centimeters?

[neko]

the only way to convert drawing units (arch to decimal centimeters) in autocad is to scale the drawing by the conversion factor.

 

in this case, one architectural unit (inch) is equal to 2.54 centimeters, so you need to scale the entire drawing by this number.

 

make sure all your layers are on/thawed/unlocked and also change your drawing units (UN) to decimal and the 'insertion scale' to centimeters (although that is likely unnecessary for what you're doing)

 

hope this makes sense

[Ivan_m]

Thanks a lot. That worked.

I've devided 1 with 2.54 and scaled all down with factor 0.3937.

[neko]

Thanks a lot. That worked.

I've devided 1 with 2.54 and scaled all down with factor 0.3937.

 

sounds like you've got it, but the conversion factor of .3937 is for converting centimeters to inches, not inches to centimeters.

[Ivan_m]

Hmm... I used the SCALE command and typed in 0.3937 (1/2.54). Everything has shrunked down as I wanted. So it seems that it did what I wanted. Or I'm doing something wrong?

[Tommy L]

I would use the scale by reference. Draw something to the correct dimension that is the wrong dimension in the existing drawing. Then scale using the two objects as a reference to each other (with snaps turned on).