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Layer Length Calculator — Cutting Guide Lengths

Calculate cutting guide lengths for uniform and graduated layered haircuts.

Longest length at bottom

Shortest layer at crown

Number of guide sections

How We Calculate This

This calculator divides the total length difference between the shortest and longest layers evenly (uniform) or progressively (graduated) across the specified number of guide sections.

The formula

Uniform: Drop per layer = (Overall length - Shortest layer) / (Number of layers - 1)

Graduated: Each subsequent drop is proportionally larger than the previous

Frequently Asked Questions

Last updated: February 2026

All calculations are estimates. Always perform a strand test before chemical services.