Calculators

Calculate the exact CAD scale ratio from a known real-world distance and the same distance measured on paper or in a PDF.

Convert real-world metric dimensions to plotted paper measurements—or paper measurements back to real dimensions—at any 1:N CAD scale.

Convert real feet and inches into the paper measurement expected at common architectural scales such as 1/4 inch = 1 foot.

Convert any 1:N CAD scale ratio to the nearest common metric, architectural and engineering scale labels.

Compare ISO, ANSI and ARCH paper dimensions, subtract a standard margin and see how much real-world area the usable sheet can cover at a selected CAD scale.

Calculate the usable printing rectangle after different left, right, top and bottom printer or plotter margins are removed from the paper.

Check whether a real drawing width and height will fit the selected paper and margins at a specific CAD scale before creating or changing a viewport.

Find the largest common metric, architectural or engineering scale that fits your drawing extents inside a selected CAD paper size and margin.

Calculate a safe title-block and border rectangle from physical plotter margins plus an additional safety inset.