Interiors · Finish carpentry

Balance the panels. Plan the molding.

Reverse-space equal panels across a usable wall run, then estimate backing, rails, stiles, cap, base, allowance, stock pieces, and cost.

← Wall run →↕ Wainscot height← Excluded opening width →← Equal panel width →← Stile width →

← Molding stock length →Rail / stile stock

1 Measure and lay out the wall

Wall runfeetWainscot heightfeetExcluded opening widthfeetTarget panel widthinchesStile widthinches

2 Enter packages and prices

Backing panel coveragesquare feet / sheetCut and waste allowancepercentMolding stock lengthfeetPrice per backing sheetUSDPrice per molding pieceUSDCap and base priceUSD / foot

Results update automatically · equal panel width is reverse-solved from the usable run

Transparent calculation

Whole panel bays with an equal-width remainder.

The layout selects the largest whole panel count near the target width, reserves every stile, and divides the remaining run equally. Backing and molding are rounded independently.

For full-height treatments, compare the board-and-batten calculator and shiplap calculator.