Interiors · finish carpentry

Baseboard and trim calculator

Convert room perimeter and openings into stock pieces, cut allowance, waste, and material cost.
Measurement guideRoom lengthRoom width

Transparent planning math

The result updates as inputs change, rounds purchase quantities up to whole packages where needed, and keeps allowance and pricing assumptions visible and editable.

Open the verified methodology for formula provenance, assumptions, a worked example, and limitations.