Baseboard & Skirting Board Calculator
Work out how many lengths of baseboard or skirting board you need for a room, minus doorways and plus waste.
Measure every wall if the room is not rectangular, and check the board length on the label — lengths vary between products.
About this tool
Enter the length and width of the room, the number of doors and the length of one board. The calculator works out the perimeter, subtracts the doorways, adds a waste allowance for mitre cuts and rounds up to whole lengths, so you know how many boards to buy.
Frequently asked questions
Add up the length of all the walls (2 × (length + width) for a rectangular room), subtract the width of each doorway, add about 10% for cuts and divide by the length of one board. A 5 × 4 m room with one 0.9 m door needs 17.1 m; with 10% waste that is 18.81 m, or 8 lengths of 2.4 m.
Moulding maker Alexandria Moulding recommends adding 10% to cover cuts, waste and future repairs. Every corner is a mitre or coping cut, and offcuts shorter than a wall are often wasted, so add more for rooms with many corners or short walls.
It depends on the product, so check the label. In the US, many primed MDF baseboards are sold in 96-inch (8 ft) lengths; in Norway, skirting boards come in lengths from about 2.15 m to 4.4 m — Pergo and BerryAlloc skirting, for example, is sold in 2.4 m lengths.
Yes. Skirting stops at the door frame, so subtract the full width of each doorway including the frame. Do not subtract windows unless they reach the floor, and remember to measure any alcoves or chimney breasts separately.
Related tools
Flooring CalculatorWork out how many packs of laminate, vinyl or wood flooring you need.Paint CalculatorWork out how much paint you need for a room, minus doors and windows.Carpet CalculatorFind how much carpet to buy for a room from a fixed-width roll, with seams, offcut and cost.Square Footage CalculatorCalculate the area of a room or space in square feet, square metres and square yards — and what it will cost.Tile CalculatorFind how many tiles and boxes you need for a floor or wall, with waste included.