How to Calculate Material Roll Length
Simple workflow instructions:
STEP 01
Measure Outer Diameter
Measure total full roll outer diameter in inches.
STEP 02
Measure Core Diameter
Measure cardboard or plastic core inner/outer diameter.
STEP 03
Set Material Thickness
Enter single layer material thickness in mils (1 mil = 0.001 in).
STEP 04
Read Total Feet
Read generated total linear feet, yards, and meters remaining on the roll.
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Frequently Asked Questions
?What is the mathematical formula for roll length?
The roll length formula is L = π × (D² - d²) / (4 × t), where D is outer diameter, d is inner core diameter, and t is material thickness.