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Roll Length Calculator
Calculate total material length on a spool or roll
Roll Formula: $\text{Length} = \frac{\pi \times (\text{Outer Diameter}^2 - \text{Core Diameter}^2)}{4 \times \text{Thickness}}$. Enter your roll dimensions below.
Roll Dimensions Input
Calculation Results
⚠️ Ensure consistency in units (inches or millimeters) across outer diameter, core diameter, and thickness measurements.