Interior
Linear footage and how many sticks of trim that actually means once you allow for mitre waste and doorways.
12 ft lengths to buy
5sticks
50.6 ft including 10% waste
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Quantities are rounded up, because materials are sold in whole units and a second trip costs more than a spare box. Cost figures are typical US ranges and are not a quote — always price against your own supplier.
Add up the length of every wall — 2 × (length + width) for a rectangular room — then subtract each doorway width. Add 10–20% for mitre and cope waste, then divide by the stick length you are buying.
10% in a simple square room, 15–20% where there are lots of corners, coped joints, or a stained finish that cannot hide a mistake with caulk and filler.
$1–$3 per linear foot for the material in primed MDF or finger-jointed pine, $3–$8 for solid hardwood, plus $2–$6 per linear foot for installation. Painting and caulking after the fact typically adds another $1–$2 per foot.
Save your rooms once and every calculator here fills itself in — length, width, ceiling, doors, windows. Free, and it also builds you a maintenance calendar.
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