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Sashing Calculator — Sashing Strips & Fabric

Calculate sashing strip quantities and fabric for quilt layouts.

Include Cornerstones

Small squares where sashing strips meet

How We Calculate This

Sashing strips run between blocks horizontally and vertically. The calculator counts all strips and works out total fabric.

The formula

Vertical sashing = (Blocks across - 1) × Blocks down

Horizontal sashing = Blocks across × (Blocks down - 1)

Cornerstones = (Blocks across - 1) × (Blocks down - 1)

Frequently Asked Questions

Last updated: February 2026

All calculations are estimates. Always verify quantities before cutting or purchasing fabric.