Roll Calculators Calculators
Plan roll lengths, weights and diameters, including cores and remaining material.
Roll Weight from Length
Calculate net film roll weight from running length, web width and GSM, excluding the core and wrapping.
Roll Length from Weight
Calculate film running length from net roll weight, web width and film or laminate basis weight.
Roll Length from Diameter
Estimate film length from roll outer diameter, core outer diameter and uniform wound film thickness.
Roll Diameter from Length
Estimate the finished roll outer diameter for a given film length, thickness and core outside diameter.
Roll Weight from Diameter
Estimate roll film weight by deriving running length from diameter and applying web width and GSM.
Roll Diameter from Weight
Convert net film weight to running length and estimate the resulting outside roll diameter.
Roll Area
Calculate the film area in a roll from web width and running length, with optional net weight from GSM.
Remaining Film on Roll
Estimate remaining length and area from the current roll diameter, and remaining weight when GSM is known.
Gross Roll Weight
Add net film, core and packaging weight for handling or transport; enter core weight or estimate it from geometry.
Core Weight
Estimate the mass of a hollow cylindrical core from outside and inside diameters, width and editable material density.
Rolls Required
Round required roll count upward from weight or running length and see the resulting excess material.
Roll Cost per Linear Meter
Allocate the film roll price over its running length to compare costs per linear meter.
Before you start
Separate net material weight from the core and outer wrapping. Diameter-based estimates assume uniform thickness and tight winding; measured running length is preferable when available.
Inputs to have ready
The exact inputs depend on the selected tool. Common inputs in this section include:
- Roll length
- Web width
- Film GSM
- Net film weight
- Roll outer diameter
- Core OUTER diameter