Baseboard Calculator: Linear Feet and Pieces

Add up the length of every wall, which for a rectangular room is twice the length plus twice the width. Then subtract the width of each doorway, since baseboard does not run across an open threshold.

Yes. Baseboard runs along the wall beneath a window, so windows are never removed. Only door openings are subtracted, each at the door width you set, which defaults to 3 feet for a standard interior door.

About 10 percent covers miter cuts at inside and outside corners, the odd miscut, and matching a profile across joints. Rooms with many corners, alcoves or returns eat more, so raise the waste for a complex layout.

The tool takes the net wall run left after doorways and grows it by the waste percent. At 10 percent, 38 net feet becomes 41.8 linear feet. Set waste to 0 if you want the bare run with no cutting allowance.

It divides the linear feet by your chosen piece length and rounds up, because trim is sold as whole sticks. So 41.8 linear feet in 8 foot pieces needs 6 sticks, since 5 would only reach 40 feet.

Common stock lengths are 8, 12 and 16 feet. Longer boards mean fewer seams on a long wall but are harder to carry and cut cleanly. Enter whichever length you can actually source and transport.

The perimeter math assumes a simple rectangle. For an L-shaped or bay room, split it into rectangles, run each one, and add the linear feet together, or measure each wall directly and total them by hand.

The fields are labeled in feet, so enter feet for the room and door sizes. To work in meters, convert your measurements to feet first (1 meter is about 3.28 feet) and read the linear feet result the same way.

No. The estimate is calculated in your browser and nothing is sent anywhere. The Copy estimate button only puts a plain-text summary on your clipboard for your own notes.