Wall Thickness Calculator — Perimeters to mm
Calculate total wall thickness from number of perimeters and nozzle width.
How We Calculate This
Formula
- Line width = Nozzle diameter x Line Width Factor
- Wall thickness = Line width x Number of perimeters
Cura and PrusaSlicer default the wall line width to 100% of the nozzle diameter (factor 1.0), so a 0.4mm nozzle gives 0.4mm lines and 3 perimeters give a 1.2mm wall. The optimal extrusion-width band is 100-120% of nozzle (factor 1.0-1.2); the calculator defaults to 1.05 (a common 5% widening that improves line bonding) but you can set the factor in Advanced Options to match your own slicer profile.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates. Always verify settings with test prints before committing to final prints.