CAD tip # 6559:

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Arithmetic expressions in AutoCAD dimensions.

If you need to use an arithmetic expression in the text (value) of a dimension (addition, subtraction, subtraction, multiplication, etc.) you can use fields with expressions and the process described in the video in the Tutorial section in the Czech version of this web site.

See:

The field-based annotation may not obey the dimension style settings for the value (e.g. alternate units, rounding, dec.separator) and you will need to set these in the expression field properties.

For simple dimension calculations you can also use the DimsReplace utility - Download - replaces dimensioned distances with hard-coded texts with optional add/multiplication factors applied to the measured value.

You can also use parametric dimensions instead of the standard ones and perform any calculation in them - see DCLINEAR.

ACAD2009LT2009ADT2009

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3.3.2009 8582×

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applies to: AutoCAD 2009 · AutoCAD LT 2009 · AutoCAD Architecture 2009 ·

See also:
Tip 13583:	Evaluate math expressions in AutoCAD DWG texts.
Tip 13426:	Use of alternative units for arithmetic in dimensions (without square brackets).
Tip 12777:	Arithmetic and trigonometric functions available in Revit expressions.
Tip 12624:	How to enter dimensions in Revit using other units?
Tip 12002:	Arithmetic expressions with measured distances in AutoCAD.

Selected tip: AutoCAD slows down after selecting MText with different TrueType font widths.

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