Pro calculator

Crown Molding Calculator

Estimate crown molding linear feet for any room.

How the crown molding calculator works

Crown molding follows the room perimeter (2 × (L + W)). Add 10% waste for miter cuts, then divide by stick length (typically 8, 12, or 16 ft).

Frequently asked questions

How much crown molding for a 12×10 ft room?

Perimeter = 44 ft. With 10% waste = 49 ft. That's seven 8 ft sticks.

How much waste should I add?

10% is standard for straight rooms; 15% if you have many outside corners or coped joints.

Related calculators

All calculators