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.

What’s New

Version 2.0

This app has been updated by Apple to use the latest Apple signing certificate.

The code has been updated to be compatible with the most recent versions of iOS.
The layouts have been changed to take advantage of the latest software features.
A new view has been added with links to other apps, books and videos created by the developer.

Ratings and Reviews

3.0 out of 5
2 Ratings

2 Ratings

iCrush-1 ,

It does what it says it does

After work with the development team, the app has met my needs

GrizzlyRhino ,


Clunky and displays an obnoxious amount of decimals for such a small text box.

Powellcrazy ,


If using whole numbers seems to work. But if I use decimals to get an accurate value crashes when putting a decimal in the OD field

App Privacy

The developer, Scott Caines, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like