Roll Length - smith-web-dev/smith-calc GitHub Wiki
This calculator will determine the approximate length of a roll. The accuracy of this calculation is highly dependent on how tightly the roll is rolled up and how true to circular the roll is.
- Outside diameter (O.D.) of the roll
- Outside diameter (O.D.) of the core (Or inside diameter [I.D.] of the roll)
- Thickness of the material
The length of the roll (in inches) is found by the formula: L = (π * (r² - c²)) / t
Where r
is the radius of the roll, c
is the radius of the core, and t
is the thickness of the material.