Baseboard Calculator — Free Online Baseboard Calculator
Calculate linear feet and pieces of baseboard or trim. 100% free, no signup.
Boards to buy
0
Perimeter0 ft
Minus openings0 ft
With 10% waste0 ft
How much baseboard do I need?
Add up the room's perimeter (2 × width + 2 × length), subtract the width of doorways and openings that won't get baseboard, add about 10% for miter cuts and mistakes, then divide by your board length and round up.
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Frequently asked questions
Do I subtract doorways?
Yes — subtract the width of each doorway and cased opening, since baseboard stops at the trim. Keep closets and most windows in the total.
How much extra should I buy?
Add about 10% for miter cuts at corners and the occasional mismeasured piece; more if the room has many corners.
Redesigning the whole room?
Download RoomGPT free and see your space in 100+ styles from a single photo.