Trim Layout: Wainscoting Calc

Trim Layout is the layout calculator for finish carpenters, trim carpenters, joiners and serious DIYers who want balanced spacing every time — without the guesswork, wasted material or trial and error.

Enter your measurements, see an instant scaled diagram, and get exact cut sizes, centers, gaps and running measurements you can mark straight onto the job.

SEVEN CALCULATORS IN ONE APP
• Wainscoting — panel widths, stiles, rails, cap and baseboard, with equal, spread, focus and alternating layouts, plus picture-frame top panels.
• Shaker Wall Paneling — panel grids with battens, openings and outlets.
• Shaker Stair Paneling — panels that follow your staircase angle.
• Board & Batten — equal or exact centers, any end condition, angled runs.
• Angled Spacing — single-slope and gable layouts for raked walls and ceilings.
• Diminishing Lengths — tapered members inside a triangle or gable.
• Baluster Spacing — railings, between posts and stairs, with gap limits for your building code (US IRC 4" / 4-3/8" on stairs, UK, Canada, Australia, Europe or your own value).

BUILT FOR THE JOB
• Tap any panel in the diagram to see its exact size and position; open it full screen and zoom in.
• Every calculator saves automatically, so you pick up where you left off.
• Metric or imperial, set by your region — type mm, inches or feet and inches; fractions to 1/8, 1/16 or 1/32".
• Materials & Cost: how many boards to buy, with a cut list that allows for saw kerf and waste, plus the paint you need.
• PDF export of inputs, results and diagram for the crew or the client.
• Works offline. No account, no ads.

TRIM LAYOUT PRO — ONE-TIME PURCHASE, NO SUBSCRIPTION
All calculators, diagrams and results are free. Pro adds:
• Unlimited saved projects (free: up to 3)
• Material costs, sheet goods for panel inserts and a shareable shopping list
• PDF export without watermark
• Family Sharing
Bought the app before it became free? Pro is already yours — if it doesn't show, tap Restore Purchases in Settings.

Stop doing layout math on a scrap of plywood. Get even panels, consistent gaps and clean reveals on the first cut — and save material, time and callbacks.