Roll Length app for iPhone and iPad

Roll length is a calculator that enables the user to enter values in any three of the four following fields: Roll OD, Core OD, Thickness, Length and calculate the remaining fourth unknown value. The following units of measure can be selected: inches, feet, millimeters, centimeters, meters, microns, gauge, mils.

This powerful calculator goes a step further and allows the user to enter actual measured values in all four fields and create a correction factor that can be designated as Product A, B, C or D. This correction factor can be assigned to a new calculation and is useful for thin films where the surface roughness is sufficient to create an air gap between the wound in layers in a roll. The correction factor can be ignored in most situations and the user selects Universal for a factor of 1.0 for no correction.