Estimate baseboard, skirting board, or interior floor trim from rooms, individual walls, or known linear footage.
Calculate gross perimeter or wall length, subtract openings, add explicit joint allowance, then apply project waste once.
Divide planning length by stock length and round upward to whole pieces.
perimeter = 2 × (length + width)net length = gross length − deductionsplanning length = (net length + joint allowance) × (1 + waste rate)pieces = ceil(planning length ÷ stock length)joints = max(0, ceil(wall length ÷ stock length) − 1)A 12 × 15 ft room has 54 ft perimeter. Subtract a 3 ft doorway, add 10% extra, and plan for 56.1 ft. With 8 ft stock, buy 8 pieces; purchased length is 64 ft and surplus is about 7.9 ft.
Without deductions, the room needs 59.4 ft with 10% extra. With 12 ft stock, buy 5 pieces.
A 5 × 4 m room has 18 m perimeter. After a 0.9 m doorway and 10% extra, 18.81 m requires 8 pieces of 2.4 m stock.
Adjust shared walls manually; listed rooms are treated independently.
Waste is added after rooms and deductions are combined.
Presets are editable conveniences, not availability claims.
This does not optimize offcuts, miters, wall allocation, or joint placement.
Subtract opening width only because baseboard is a linear measurement.
Multiple-room mode combines independent room perimeters. Individual-wall mode supports irregular layouts.
Minimum joints assume fresh stock per wall and do not optimize leftover reuse. Joint allowance is added before waste.
Cost uses whole pieces or purchased linear length and excludes labor, fasteners, adhesive, finish, delivery, and tax.
Add wall runs, subtract openings, add allowances, then round whole stock pieces upward.
For a rectangle, use twice the sum of length and width.
Yes, subtract doorway width where trim is not installed.
Choose waste for project complexity; 10% is editable, not universal.
Divide planning length by 8 ft and round upward.
Yes, metric dimensions and stock lengths are supported.
No. It is a stock-length estimate, not a cut list.
No. Height and thickness are informational.