When you enter the required inputs and click "calculate" a new window will appear containing all of the relevant diameters needed to typically specify an American Standard BUTTRESS machined thread on a drawing.

Make sure you select the tolerance class you desire.

Once the output appears, you can click the DESIGN DOCUMENT link to get a nicely formatted output for your design file.

Note that for most applications, a class 2 is most typically used.  We've included the ability to select the higher classes only for completeness.