Estimate crown molding linear feet, waste, full stock pieces, purchased length, and optional local cost.
Enter measurements below. Results update as you type, and optional prices can be added before sharing the estimate.
Measured run
Two room lengths + two room widths.
Adjustments
Additional runs are added and intentionally skipped sections are deducted.
Waste
10% is added for corners, scarf joints, pattern matching, and offcuts.
Purchase pieces
Waste-adjusted linear footage is rounded up to the selected full stock length.
The calculation
Stock pieces = ceiling(((measured run + additions − skips) × (1 + waste)) ÷ stock length)
Quick examples
Examples are planning checks. Product-label coverage and whole pack sizes control the final purchase quantity.
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Plan mitered or craftsman door trim before purchasing and cutting stock.
Common questions
Add the molding runs around the room, include bays or returns, subtract sections intentionally left open, add an allowance for cuts and pattern matching, then round up to full stock lengths.
Add two room lengths and two room widths to get the perimeter. The calculator can then add extra runs, subtract skipped sections, apply waste, and round the result to full stock pieces.
Waste depends on room shape, inside and outside corners, coped or mitered joints, scarf joints, pattern repeat, stock defects, and installer experience. Use a visible allowance appropriate to the actual room and product.
No. This page estimates material quantity. Crown spring angle, wall-corner angle, saw orientation, coping, and compound-miter settings must be confirmed separately on the actual room.
Crown molding normally follows the wall-to-ceiling line, so ordinary doors and windows are not deducted. Use skipped sections only where crown molding will intentionally stop.
Yes. Enter a local price per full stock piece and the calculator applies it to the rounded purchase quantity.