Baseboard & Trim Calculator
Use this baseboard & trim calculator to estimate baseboard and trim length for a room. Enter wall lengths, door openings, trim length and waste allowance and review estimated trim length and piece count.
Baseboard needed (with 10% waste)
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Room perimeter —
Boards to buy —
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How it works
Linear feet = perimeter − doorways, plus ~10% for miter-cut wasteHow to use the Baseboard & Trim Calculator
Start by entering wall lengths, door openings, trim length and waste allowance. Keep the units consistent and check that each value belongs to the same question.
The result gives estimated trim length and piece count. Corners, returns and cuts affect the final amount. Use it as a guide and check any instructions, rules or professional advice that apply.
Frequently Asked Questions
What does this baseboard & trim calculator calculate?
It gives estimated trim length and piece count. Corners, returns and cuts affect the final amount.
What information should I enter?
Enter wall lengths, door openings, trim length and waste allowance. Use the same units throughout so the result is easier to understand.
Should doorways be removed from the total?
Usually, yes. Exclude openings and then add trim needed around returns or special sections.