The room's size, its doors and how many rooms like it in. Linear feet of baseboard, the pieces to buy and the installed price out.
Result
The room takes45 linear ft of baseboard.
48 ft around, less 1 doorway of 3 ft. With 10% waste, buy 50 ft.
What to buy
7 pieces of 8 ft baseboard
Installed and painted, about $350 to $475 at $8.00 to $10.50 a linear foot
The trim
Around the room
48 ft
Doorways off
3 ft
Baseboard
45 ft
The room from above. Baseboard runs all the way around, wall to wall at the floor, except across the doorways.
How the baseboard is counted
Around the room is twice the length plus twice the width: a 12 by 12 room is 48 feet around.
Doorways come off at 3 feet each, since the baseboard stops at the casing.
Rooms like it multiply the room, for a house of same-size bedrooms.
Waste covers the miters at the corners and the short ends: about 10% for a plain room.
Pieces are the length to buy divided by the stock length, rounded up.
The price is the baseboard's length times the baseboard cost guide's rounded price per linear foot: 3 1/4 inch paint-grade baseboard, the old baseboard taken off, sealed and painted, with the contractor's overhead, profit and sales tax.
Common questions
How much baseboard for a 12 by 12 room?
48 feet around, about 45 after one doorway, and about 50 to buy with 10% waste: seven 8 foot pieces or five 12s.
Should I buy long or short pieces?
Longer pieces leave fewer joints on long walls; shorter ones are easier to carry and fit small rooms with less waste. The calculator counts either.
What does baseboard cost installed?
$8.00 to $10.50 a linear foot for 3 1/4 inch paint-grade baseboard, sealed and painted. The baseboard cost guide has it by state.
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