@jim said: Just a note - Sketchup.format_area manages the conversion from sq. in. to model units. If the Model Units are mm; Sketchup.format_area(1.0).to_f > ==> 645.16 One of the more useless aspects of this 'method' [ .format_area] is that you will often draw in mmor cmbut want areas in sqm! Like drawing in inchesand wanting areas in sqft... SUp has many methods that are easily done another way but lacks so many methods it still really needs...