How To Change Units Of Existing Drawing In Autocad

Use this procedure to specify the drawing units in a new or existing drawing.

If you change the drawing units, you can specify whether existing objects in the drawing are scaled to the new units or retain their original size. You can also specify whether objects inserted from a drawing that uses unlike units are scaled to the units in the electric current drawing, or retain their original size.

You tin specify the unit type and precision for linear, athwart, surface area, and volume units. The precision values specify only the number of decimal places displayed in the interface. They exercise not determine the number of decimal places used in the software to brand calculations.

When you modify the drawing units, the default options under Surface area and Volume alter to reflect the new drawing units. The drawing scale options on the Scale tab also change to reflect the new cartoon units.

Click Utilities Drawing Setup .
Click the Units tab.

Specifying default units options for the electric current cartoon
Nether Drawing Units, select the desired units.
Various purple and metric units are available. The units that you select determine the unit of measurement that each unit of measurement in your drawing represents. For case, if you lot select Inches, each drawing unit equals 1 inch.
To calibration objects that yous insert into the current drawing from drawings with dissimilar drawing units, select Scale Objects Inserted from Other Drawings.
Clear this choice to insert objects at their original size without scaling. For case, if an item that is ane inch long were inserted into a drawing set to millimeters, this setting would scale the item to 25.four mm in length when enabled. With this setting disabled, it would remain one unit long (which would now be only 1 millimeter rather than i inch).
Under Length, select a unit of measurement type and desired precision.
Under Angle, select an angle type and desired precision.
If you desire to measure angles clockwise instead of counterclockwise, select Clockwise.

Under Base of operations Bending, enter a value for the default 0 angle direction. The default is 0 degrees (Eastward) and a counter-clockwise direction.

Imported survey drawings may include drafting instructions where changing the base angle might be desirable to properly orient the data.

The following values match these directions:

Value	Direction
0	Due east
90	North
180	W
270	Southward

Under Area, select an surface area type and precision.
If you do not desire to utilise the default suffix that is displayed for the drawing units that you specify, enter a new suffix.
Under Volume, select a volume type and precision.
If you do not desire to use the default suffix that is displayed for the drawing units that yous specify, enter a new suffix.
Under Lighting Units, select a lighting unit of measurement type.

Save the units settings:

If you want to…	And then…
save the units settings as default settings for new drawings that you start from scratch or from templates that do not contain cartoon setup information	select Salvage as Default. Settings on the Scale and Layering tabs are also saved every bit default settings.
save the units settings only for the current drawing	articulate Save as Default, and then click Utilize.

Note: You tin can salve i default drawing units set per unit of measurement type with the Save every bit Default option. Ascertain a fix of majestic drawing units defaults, and click Salve as Default. Then, define a ready of metric default units, and click Save equally Default again. When yous starting time a cartoon without a template with purple units, the purple default settings will be used. When you commencement a drawing without a template with metric units, the metric default settings will be used. If y'all kickoff a new drawing with a template, the settings saved inside that template file will be used regardless of the saved default settings.

Click OK.
Yous are prompted to specify whether existing objects in the electric current drawing should be scaled for the new units.

Specify scaling of existing Model Space and Paper Infinite objects:

If you lot desire to…	Then…
scale all existing objects in the drawing to reverberate the new units	select Rescale modelspace and paperspace objects.
scale objects in Model Space to reverberate the new units	select Rescale but modelspace objects.
leave all objects at their current calibration	select Don't rescale any existing objects.

Source: https://knowledge.autodesk.com/support/autocad-architecture/learn-explore/caas/CloudHelp/cloudhelp/2021/ENU/AutoCAD-Architecture/files/GUID-652DA67D-C364-43C6-A71D-FD1E676A0374-htm.html

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