Crown Molding Calculator
How many pieces of crown molding
Adding crown molding? Enter the room perimeter to find the linear feet and number of pieces, with extra for miter cuts.
Plan extra for miters
Crown molding meets at angled corners, and miter cuts eat material. Add up the room perimeter and include ~10–15% waste — corners are unforgiving, and practice cuts add up.
Frequently asked questions
How much crown molding waste should I plan?
10–15% — inside and outside corners require precise miter cuts that often need a redo.
What lengths does crown molding come in?
Commonly 8 to 16-foot pieces; use longer pieces to avoid seams on long walls.