Trim & Baseboard Calculator

Total trim length (linear ft). Add the measured lengths of the walls or other runs receiving this trim. Measure the actual trim path rather than assuming it equals a room’s floor perimeter. Keep different profiles or stock lengths in separate estimates.

Opening deductions (linear ft). Subtract the lengths of openings or interruptions where this trim will not be installed. Enter linear feet, not the square-foot area of a door. Leave the field blank if your total already excludes these interruptions.

Stock-piece length (ft). Enter the length of one stock piece you plan to buy. The calculator divides total required footage by this length, but it does not fit individual wall runs onto boards. Long runs, miters and unusable offcuts may require additional pieces.

Waste allowance (%). Enter the percentage you want to add for cutting, handling loss or other conditions specific to this work. Apply it to the measured quantity rather than enlarging the measurements as well. The suggested value is editable, not a universal recommendation; enter zero when no allowance is needed.

Net footage removes the entered interruptions; required footage adds waste. Pieces are a whole-stock estimate from the combined footage, and purchased footage is the length of those pieces. This does not prove that the individual runs can be cut from that stock count. Make a cut list when long runs and offcuts control purchasing.

Net length = total linear footage − deductions.
Required length = net length × (1 + waste ÷ 100).
Pieces = round up(required length ÷ stock-piece length).

Worked example: 100 linear ft minus 10 ft of openings leaves 90 ft. With 10% waste, allow 99 ft. At 16 ft per piece, 6.1875 rounds up to 7 pieces, totaling 112 ft.

Does not optimize cuts, corners, miters, or scarf joints. Individual runs and offcut reuse may require more stock than aggregate division suggests. Confirm a cut list before ordering where piece lengths matter.