Lining Calculator — Fabric & Felt for Boxes
Calculate fabric or felt quantities for lining boxes and cases.
How We Calculate This
This calculator estimates the fabric or felt needed to line the interior surfaces of a box.
Area calculation
Base = Length x Width
Sides = 2(L x D) + 2(W x D)
Lid = Length x Width
Each piece includes a 20mm overlap allowance for folding and trimming. The fabric length is calculated based on the roll width to determine how much linear fabric to purchase.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates. Always verify measurements and material quantities before cutting or purchasing.