Enter your Room Width, Room Length, Ceiling Height, and counts for Doors and Windows, then select Trim Types Needed and Waste Factor — the Trim and Molding Calculator breaks down your Total Linear Feet Needed across Baseboard, Door Casing, Window Casing, and Crown Molding.
Total Linear Feet Needed
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Baseboard
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Door Casing
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Window Casing
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Crown Molding
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Chair Rail
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Waste Allowance
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Measure the length and width of your room in feet. For ceiling height, measure from floor to ceiling. Count all doors and windows that will need casing trim.
Standard door casing requires about 18 linear feet per door (32" x 80" opening). Standard window casing needs about 15 linear feet per window (48" x 36" opening).
We recommend adding 10% extra material for cuts, waste, and future repairs. For complex projects with many corners or angles, consider 15-20% waste factor.
Yes, the calculator automatically subtracts door and window openings from baseboard measurements since these areas don't require trim at floor level.
Crown molding runs along the ceiling perimeter where walls meet the ceiling. Chair rail runs horizontally around the room at chair height, typically 32-36 inches from the floor.
Basic pine trim costs $1-3 per linear foot, while premium hardwood trim can cost $5-15 per linear foot. Add installation costs of $2-5 per linear foot if hiring professionals.
This calculator works best for rectangular rooms. For L-shaped or irregular rooms, break them into rectangular sections and calculate each separately, then add the totals.
Essential tools include a miter saw, nail gun or hammer, measuring tape, level, coping saw for inside corners, and wood glue. Safety glasses and hearing protection are also recommended.