Baseboard / Trim Calculator
✓ Your estimate
Estimated trim needed
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linear ft incl. waste
Switch display unit only.
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Room perimeter
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Net linear ft
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Linear ft incl. waste
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Pieces
View units
Calculate first to see unit conversions.
What this estimate includes
This estimate shows room perimeter, net trim length after openings, adjusted linear feet, and pieces needed.
How it’s calculated
Perimeter = 2 × (length + width)
Net linear feet = perimeter − openings
Adjusted linear feet = net linear feet × waste %
Pieces = adjusted linear feet ÷ piece length, rounded up
Before you order
Miter cuts, coped corners, mistakes, and layout choices can add waste. Confirm piece lengths available at your store before buying.
Frequently Asked Questions
Should I subtract door openings?
Yes, subtract openings where baseboard or trim will not be installed.
How much waste should I add for trim?
Ten percent is a common planning allowance; complex rooms may need more.
Does this include casing or crown molding?
It can be used for any straight trim length, but enter the correct room or wall lengths for that trim type.
Disclaimer: This calculator provides estimates only. Actual quantities depend on product coverage, jobsite conditions, waste, and supplier details. Verify all quantities before ordering. See all interior material calculators.