Pipefitting Laterals solves piping intersections from 0 to 90 degrees.
It has two modes - First and most popular is for Nominal Pipe Sizes from " thru 24" Standard Weight Pipe (the default setting). It can solve size on size or any intersection where the branch is smaller than the main.
Second - it will solve any round size on another round size of any thickness. Note the entry mode changes where exact outside dimensions (OD) are required plus the branches wall thickness. This is required as the inside of the branch connection fits onto the outside of the main.
In either case the results are the ordinates for 16 points to lay out the lateral. Plus it gives the take off from the wrap-o-round line to the center of the main for any degree used.
Of course we're assuming you're a journeyman pipefitter (steamfitter) and know how to layout the pipe when the calculated ordinates are given.
For additional information please see our website http://watersmechanical.com/appsforpipefitting.html which has a help page for using this app.
Added The option to convert to fractions