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Baseboard calculator

This baseboard calculator is a linear-footage estimator that converts room dimensions into perimeter, subtracts door openings, adds a cut-waste factor, and returns the number of pieces to order in standard stick lengths. It works for baseboard, casing, quarter round, and shoe moulding.

Your rooms

Openings is the total width of doorways and other gaps in each room. A standard interior door opening is about 3 ft. Sum all gaps where baseboard is skipped. Measurements in decimal — 6 inches is 0.5 ft.

Every mitered corner consumes material. 10% covers a typical room.
Longer sticks mean fewer joints. Match the stick length to your longest wall where possible.
GDBS trim is priced per linear foot — e.g. $3.49/LF.

How the math works

Baseboard is estimated by perimeter. The calculator doubles each room's length plus width to get the perimeter, subtracts the total width of door openings, and sums the rooms into one linear-footage run. It then adds the waste factor you select and divides by your stick length, rounding up to whole pieces — trim is sold in full sticks, not by the cut.

The waste factor is not optional. Every mitered corner consumes material, and walls shorter than your stick length still consume full sticks' worth of cuts. 10% covers a typical room; use 15% where corners are many or wall segments run short. The calculator does not optimize cut layouts — the piece count is simple ceiling division, and the waste factor is what absorbs the offcuts.

Casing around doors and windows is measured per opening — two legs plus a head — not by room perimeter. Measure each opening you are trimming and total that length separately from the baseboard run.

Baseboard calculator FAQ

How much extra baseboard should I order?
Add 10% to the measured run for a typical room with mitered corners. Use 15% for rooms with many corners, bay windows, or wall segments shorter than your stick length, where offcuts are too short to reuse. Trim is sold in full sticks, so the calculator rounds up to whole pieces.
What stick length should I choose?
Longer sticks mean fewer joints. Use 16-ft where walls are long and access allows; 8-ft sticks are easier to transport and handle in small rooms. Match the stick length to your longest wall where possible so runs are seamless.
Do I subtract doorways?
Yes. Baseboard skips door openings, so enter the total width of all openings per room. A standard interior door opening is about 3 ft. Closets with doors count too if the baseboard stops at the casing.
Does this work for quarter round and shoe moulding?
Yes. Quarter round and shoe follow the same perimeter as the baseboard, so the linear footage is identical. Run the calculator once and order both profiles at the same length.
How is trim priced at GDBS?
Per linear foot — for example $3.49/LF for paulownia baseboard — but it's sold in full sticks. The calculator prices the full sticks you buy, not just the footage you install, so the estimate matches the till.

Got your number? Paulownia trim ships nationwide, with local delivery within 100km of the Scarborough showroom.

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