How to use
- Enter room dimensions and door counts.
- Set average door opening width, stock piece length, and waste.
- Review total linear feet and pieces to buy.
Input guide
- Door opening width is deducted per door.
- Piece length should match the trim sold by your supplier.
- Waste helps cover cuts, miters, coping, and mistakes.
Common mistakes
- Forgetting closets and hallways.
- Ordering exact linear footage without cut waste.
- Ignoring long wall lengths that may require splices.
Assumptions and limitations
- No casing, shoe molding, stairs, curved walls, transitions, or exact cut optimization is included.
- Door deductions are average planning values.
- Optional price is user-entered only.
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Formula
- Room perimeter = 2 x (length + width).
- Trim length = perimeter minus door opening deductions.
- Length with waste = trim length x waste factor.
- Pieces needed = length with waste / stock piece length, rounded up.
Example
A 12 ft x 10 ft room has 44 linear feet of perimeter. With one 3 ft door and 10% waste, buy 6 pieces of 8 ft trim.
FAQ
Should I round trim pieces up?
Yes. Stock trim is bought in full pieces, and cuts make exact linear footage hard to use perfectly.
Does this include shoe molding?
No. It estimates baseboard stock only; shoe molding or quarter round should be estimated separately.