Wall Panel Calculator

Wainscot Panel Calculator

Enter your wall width, stile size, and panel count to get exact panel widths, a scaled elevation drawing, and a downloadable cut list.

Panel Width
19.8 in
computed
Stiles TotalTotal width taken up by all vertical stiles: left terminating + right terminating + internal stiles between panels. This value is subtracted from the wall width before panel widths are calculated.
21 in
left + right + internal
Status
OK

Elevation

Pattern: Even Panels · Scale: 8 px/in
19 13/16"19 13/16"19 13/16"19 13/16"19 13/16"36" tall023 5/16"46 5/8"69 7/8"93 3/16"116 1/2"marks120 in
Exports
SVG / PNG elevation and CSV cut list.
How to use

Quick setup and common defaults

Wall

Enter the full wall width first. Use Feature Center + Snap to Center to align panels to windows, outlets, or fixtures.

Stiles

End Stile sets both ends of the wall at once; the most common size is 3.5 in (a 1×4). Internal stiles usually match. Need different left and right widths? Use Customize left/right.

Panels

Set # Panels, then choose a Section Pattern. Panels stay equal width with stiles inserted between them.

Snap to Center
Use Feature Center to align a panel center to a window, outlet, fixture, or sconce.
  • Feature Center represents the distance from the left edge of the wall to an important visual reference (window, outlet, fixture, sconce, etc.).
  • Clicking Snap to Center adjusts the left and right terminating stiles so that the center of a panel aligns with the Feature Center.
  • The calculator evaluates all panels and snaps to the one that produces the smallest movement.
  • Panel count and internal stile widths are not changed. Only the terminating stiles are adjusted.
  • If the layout is already centered, snapping may result in no visible change.

How the wainscoting calculator works

Wainscoting looks right when every panel is the same width and the stiles land where the eye expects them. The calculator takes your total wall width, subtracts the two end stiles and every internal stile, and divides what remains evenly across the panel count. The elevation drawing updates as you type so you can see whether the proportions work before you cut anything.

Start with the defaults (a 10 ft wall, 1×4 stiles, five panels) and change one input at a time. If the status reads Overconstrained, the stiles are wider than the wall allows; reduce the panel count or stile width. If it reads OK (narrow), panels are under 8 inches and will look busy.

Wainscoting calculator FAQ

How do you calculate wainscoting panel width?
Subtract every vertical stile from the wall width, then divide by the number of panels. Panel width = (wall width − left stile − right stile − internal stiles × (panels − 1)) ÷ panels. A 120 in wall with 3.5 in stiles and 5 panels gives (120 − 7 − 14) ÷ 5 = 19.8 in panels.
How wide should wainscoting stiles be?
Most wainscoting uses 3 to 4 inch stiles. A 1×4 board (3.5 in actual) is the most common choice for both terminating and internal stiles. Narrower 2.5 in stiles (1×3) suit small rooms or short walls; 4 to 5 in stiles suit tall paneling and large rooms.
What is the standard wainscoting height?
Traditional wainscoting is 32 to 36 inches tall, roughly one third of an 8 or 9 foot wall. Taller styles run 40 to 48 inches, and two-thirds height (60 to 66 inches) is popular for board and batten and modern interiors.
How many panels should a wall have?
Aim for panel widths between 16 and 24 inches for a balanced look. Divide your usable width by 20 inches to get a starting panel count, then adjust up or down until the panels look proportional to the wainscoting height. Avoid panels narrower than 12 inches.
How do I center wainscoting panels on a window or fixture?
Enter the distance from the left edge of the wall to the center of the window, outlet, or fixture as the Feature Center, then click Snap to Center. The calculator shifts the terminating stiles so a panel center lines up with that feature without changing the panel count.

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