The Roll Length Calculator Tool will assist you in determining the length of a roll of material. This calculation should be used for estimates and not for exact measurements.

Roll Outer Diameter = The diameter of the 2nd to last full revolution of material. Unit: inches.
Roll Inner Diameter = The outside diameter of the core. Unit: inches.
Material Thickness = Full thickness. Includes the liner if there is one. If thickness varies, we recommend that you use the highest number in the range. Unit: inches.

Roll Length