Baseboard Calculator
Room perimeter, stock lengths and purchasing allowance.
How it works
For a rectangular room, use twice the sum of length and width. Subtract untrimmed openings, add a cutting allowance and round up to whole stock lengths. Corners and cutting order can increase the final purchase.
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How the Baseboard Calculator works
Estimate linear feet of baseboard and the whole stock lengths needed for a room. Use either a rectangular perimeter or an already measured total trim length.
Perimeter to stock lengths
A 16 × 12 ft room has a 56 ft perimeter. Subtract a 3 ft doorway for 53 ft of net trim. A 10% cutting allowance gives 58.3 ft, requiring eight 8 ft lengths, or 64 ft purchased.
Measure walls, then check cuts
Floor area cannot determine perimeter on its own. An L-shaped room needs the measured sum of the walls receiving trim. Do not deduct an opening twice when entering an already net total.
This is a combined-length estimate rather than a cutting optimizer. Long uninterrupted walls, miters and the desired position of joints can need more stock. The purchase result covers trim only; fasteners, caulk and installation are separate. Estimate flooring separately.
FAQ
Should I subtract doors? expand_more
Subtract the width of each opening where baseboard will not be installed.
Can I calculate several rooms? expand_more
Add their measured trim lengths and use known length. Check the stock cutting plan across rooms before ordering.
Does this count outside corners? expand_more
No. It estimates stock lengths; corner fittings and special profiles need a separate count.