Baseboard Calculator
Enter your rooms, subtract doorways, and pick a stock length. Get the linear feet of baseboard and how many pieces to buy.
1 Room Perimeter
Perimeter per room = 2 × (length + width). An L-shaped room has the same perimeter as the rectangle around it.
Add up every wall that gets baseboard, before subtracting doorways.
2 Doorways (subtracted)
Baseboard stops at the door casing, so measure casing edge to casing edge.
3 Stock Length, Waste & Price
Stock lengthPer linear foot. Leave blank to skip cost.
Results
Adding shoe molding or quarter round? Plan on about the same linear footage.
Estimates only. The piece count is by total footage. Lay out a cut list for long walls before you buy.
How to calculate baseboard
Add up the room perimeter, subtract the width of every doorway, add about 10% for miters and offcuts, then divide by your stock length and round up to whole pieces.
Worked example
A 12 × 14 ft room with one 36 in doorway, using 12 ft stock and 10% waste.
- Perimeter: 2 × (12 + 14) = 52 ft.
- Subtract the doorway: 36 in ÷ 12 = 3 ft. 52 − 3 = 49 linear ft.
- Add 10% waste: 49 × 1.10 = 53.9 ft.
- Pieces: 53.9 ÷ 12 = 4.49, round up to 5 pieces (60 ft).
- At $1.50 per linear foot: 60 × $1.50 = $90.00.
Check the cut list too. In this room the 14 ft walls are longer than 12 ft stock, so each needs a joint. Buying 16 ft stock would let each wall go up in one piece. Painting the trim and walls? Use the paint calculator.
Every wall length and doorway, from one iPhone scan.
SiteScope uses the LiDAR sensor on iPhone Pro and iPad Pro to scan a room and build a measured floor plan with each wall's length and the doors and windows in place. Read your perimeter and wall lengths off the plan instead of walking the room with a tape.
- Wall lengths, doors and windows on a 2D floor plan
- Multi-room projects, one scan per room
- Guest scanning: a homeowner scans with the free app on their own iPhone Pro, no account needed, and you get the plan
Scanning needs an iPhone Pro or iPad Pro with LiDAR.