Baseboard Calculator
Measure the linear feet of baseboard and trim a room needs.
What you'll need to order
- baseboard moulding
- finish nails
- wood filler
- caulk
- quarter round
Prices vary by region and haul distance. Get quotes from at least two local suppliers.
How this calculator works
linear ft = (perimeter − doorways) × 1.10
The 10% covers mitre cuts, coped inside corners and the offcuts that are always a few inches too short for the next wall. Buy the longest sticks that will fit through the door — fewer joints look better.
Worked example
With room length 14 ft, room width 12 ft, total doorway width 6 ft, length per stick 16 ft, this calculator returns 3.16 .
Waste allowance
The headline figure includes a 10% allowance for waste and over-ordering. The exact requirement is shown alongside it.
Frequently asked questions
How do I measure baseboard for a room?
Add up the perimeter, subtract the width of every doorway, then add 10% for mitres and offcuts. A 12 by 14 room with two 3 ft doors needs about 51 linear feet.
What length baseboard should I buy?
The longest that fits your walls in one piece and through your doorway. Sixteen-foot sticks let most rooms run wall to wall without a scarf joint, which is always visible once painted.
Should inside corners be mitred or coped?
Coped. Walls are never truly square, and a mitred inside corner opens up as the house moves. A coped joint tightens against the profile and stays closed.
Do I subtract doorways from the measurement?
Yes, subtract the clear opening width. Do not subtract fireplaces, cabinets or built-ins until you have confirmed no baseboard runs behind or beside them.