" mcs. Fitting" is a Calculations app for pipe fitter. Calculations include: Fitting to Fitting Offset With 90 Degree and Mitered Fitting. Fitting to Fitting Offset 2 Mitered Fitting. Offset With Tee and Mitered Fitting. Any Degree of Offset. Offset With 90 Degree Elbow and Mitered Fitting. Inside and Outside Measurements to miter a fitting. Offset With 2 Mitered Fitting.