Units won't change

[a1004518]

I am trying to design a room in AutoCAD 2D, and I need to switch from inches to feet, and vice versa, but even if I switch it, a line with a length of 5 is the same in both units. How can I fix this?

[paullimapa]

Reply with the steps/commands you used to try to do this

[pendean]

Did you only use UNITS command? that's just a display setting, nothing in your file changed.

DWGUNITS command is the way to covert a DWG file's actual drawn object's size unit: it provides a long line of questions you need to answer, including scaling.
https://www.landfx.com/docs/cad-basics/autocad-getting-started/4834-units.html#:~:text=verify%20your...

[murray-clack]

Just because you are changing the UNITS doesn't change the physical length of the geometry.  If you want to go from drawing from inches (1 unit = 1") to feet (1 unit = 1'), then you need to scale down everything by a factor of 0.08333 (1 / 12).

[leeminardi]

The implementation of units in AutoCAD is a source of much confusion.  Units, for example, inches feet, meter, etc. are NOT stored with the drawing.  The AutoCAD database is generally considered dimesionless.  The units commands sets the format for how distances should be specified.

Let's say that you would like to create a horizontal line 14.5 inches long and I am assuming that 1 = 1 inch and the units command has been set to inches.

I could enter 

line (pick point) then @Anonymous.5,0

Changing units to architectural I would specify: 

line (pick point) then @1'2-1/2,0

The line is 14.5 units long in either case.

If you are comfortable specifying the foot mark apostrophy ' when entering dimensions then assume that the AutoCAD units are inches.