Crown Molding Calculator

Enter your room perimeter, corners, and number of rooms to estimate crown molding pieces, corner blocks, and accessories — then compare total costs across four popular materials.

Room Perimeter (ft)

Inside Corners

Outside Corners

Number of Rooms

Waste Factor (%)

Material Pricing ($/linear ft, edit to match local rates)

MDF Primed ($/LF)

Pine ($/LF)

Poplar ($/LF)

Polyurethane Foam ($/LF)

Accessory Pricing (edit to match local rates)

Inside Corner Block ($)

Outside Corner Block ($)

Finish Nails ($/100)

Adhesive Tube ($)

Room Plan

Molding Pieces

8 ft lengths

Total Linear Feet

62 LF

56 LF + waste

Corner Blocks

4 in + 0 out

Optional corner blocks

Nails & Adhesive

93 nails

2 adhesive tubes

Purchase Option	Quantity	Est. Cost
MDF PrimedBest value	8 pieces	$127.84
Pine	8 pieces	$174.04
Poplar	8 pieces	$220.24
Polyurethane (Foam)	8 pieces	$143.24

Best value: MDF Primed at $127.84MDF primed crown molding is the most affordable and takes paint well. Pine offers a natural wood look at a moderate price. Poplar is a premium paintable hardwood with excellent stability. Polyurethane foam is lightweight, moisture-resistant, and easy to install for DIYers.

MDF moisture warningMDF crown molding should only be used in dry interior spaces. It will swell and deteriorate in bathrooms, kitchens near sinks, or other high-humidity areas. Consider polyurethane foam or poplar for moisture-prone rooms.

This is a material estimate based on standard 8 ft piece lengths. Actual quantities may vary depending on room layout, ceiling angles, and molding profile. Corner blocks are optional — skilled installers may prefer coped or mitered joints instead. Always verify measurements on-site.