Hey guys I came across these apps that really helps out alot with calculations. They are so simple and quick. The links below are for android phones but my buddy also has some for Iphone. I hope it can help!
Pipe Fitter Calculator - calculates fitting take-outs, custom cut fittings, rolling offsets, cut length of pipe, rolling 90 offsets, equal spread offset and more.
http://play.google.com/store/apps/de...fittings.kevin
Lateral Pipe Calculator - Calculates 90 degree Saddle on/in, eccentric saddles, Lateral offsets, eccentric lateral offsets
http://play.google.com/store/apps/de...y.trigonomitry
Mitered Pipe Calculator - Mitered Pipe, Mitered Offsets, True Wye fabrications.
http://play.google.com/store/apps/de...lculator.miter