Free Baseboard Length Calculator
Calculate the total linear feet of baseboard trim needed for a room, accounting for door openings and a waste factor.
feet
feet
feet
%
Net Baseboard Length
46.0 ft
Room Perimeter52.0 ft
With Waste Factor50.6 ft
Pieces Needed (8 ft lengths)7 pieces
Net Baseboard Length vs Room Length
How to Calculate Baseboard Length
Formula
Net Length = Perimeter - (Number of Doors x Door Width)
Total with Waste = Net Length x (1 + Waste %)
Measure the perimeter of the room and subtract the width of every doorway (baseboards do not run across door openings). Add 10% for waste from cuts at corners and joints. Baseboard is typically sold in 8-foot or 12-foot lengths.
Example Calculation
A 14 x 12 foot room with two 3-foot wide doorways and 10% waste.
- 01Perimeter = 2 x (14 + 12) = 52 ft
- 02Door deduction = 2 x 3 = 6 ft
- 03Net baseboard = 52 - 6 = 46 ft
- 04With 10% waste = 46 x 1.10 = 50.6 ft
- 05Pieces needed = ceil(50.6 / 8) = 7 eight-foot pieces
Frequently Asked Questions
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