Wainscoting Calculator
Panel layout, stile positions, rail lengths, and a full cut list for classic picture-frame wainscoting.
Your estimate
You'll need 6 panels at 20 1/2" wide and 8 boards — about $88.00.
7 stiles · panels 20 1/2" × 29" · 52.9 linear feet of trim
Measurements
Wainscot layout
⅓ of wall height is classic
Subtract doors and windows
No openings yet. Add each door or window and its area comes out of the total.
Waste & cost
10% is standard
Wall elevation with the wainscot frame drawn to scale. Tick marks give the center of each stile from the left edge.
The breakdown
- Panels
- 6
- Panel width
- 20 1/2"
- Panel height
- 29"
- Stiles
- 7
- Wainscot height
- 3' 0"
- Wainscot area
- 36 sq ft
- Wall area above wainscot
- 60 sq ft
- Openings subtracted
- −0 sq ft
- Stile linear feet
- 16.9 lf
- Rail linear feet
- 36 lf
- Waste overage (10%)
- 5.3 lf
- Boards to buy (8 ft)
- 8
- Estimated cost
- $88.00
Lumber cut list
| Part | Cut length | Qty |
|---|---|---|
| Stile | 29" | 7 |
| Top rail | 12' 0" | 1 |
| Bottom rail | 12' 0" | 1 |
| Cap rail | 12' 0" | 1 |
| Stock boards to buyIncludes waste overage | 8 ft | 8 |
Marking positions
Measured from the left edge of the wall to the center of each piece.
- Stile 11 1/2"
- Stile 22' 1"
- Stile 34' 0 1/2"
- Stile 46' 0"
- Stile 57' 11 1/2"
- Stile 69' 11"
- Stile 711' 10 1/2"
Where to buy
Hand-picked search links for the materials on your list. As an Amazon Associate, ProjectMath earns from qualifying purchases.
Prices and availability are set by the retailer and change often. Always confirm the exact product size matches what this calculator assumed.
How this is calculated
Wainscoting is a frame problem: rails and stiles are fixed, and the panel openings absorb whatever is left over. The calculator solves the panel width so every opening is identical.
- panel field width = wall width − 2 × stile width − (panels − 1) × stile width
- panel width = panel field width ÷ panel count
- panel height = wainscot height − top rail − bottom rail
- stile center #i = running total of stile and panel widths from the left edge
- linear feet = rails × wall width + stiles × panel height
- 1Measure the surfaceMeasure the width and height (or length) of the area in feet, inches, or meters and enter them in the calculator.
- 2Set the wainscot heightOne third of the wall height is the classic proportion. Enter the height to the top of the cap rail.
- 3Choose stile width and panel countEnter your stile stock width and either a panel count or let the calculator solve for evenly proportioned panels.
- 4Cut and installUse the cut list for top rail, bottom rail, and stiles, then mark stile positions from the left edge of the wall.
- 5Read the shopping listThe calculator rounds up to whole units to buy and multiplies by your price per unit for an estimated total. Copy or print the plan and take it to the store.
Common questions
How tall should wainscoting be?
About one third of the wall height is the traditional rule — roughly 32 to 36 inches on an 8 foot wall. Taller 48 inch wainscot reads more formal.
How wide should wainscoting panels be?
Panels usually look best between 16 and 30 inches wide, and slightly taller than they are wide. The solver picks a panel count that keeps widths in a comfortable range.
Do panels need to be identical on every wall?
Panel widths should be consistent within a wall. Between walls, aim for similar widths rather than identical ones — matching the count exactly on walls of different lengths looks worse.
What is the difference between wainscoting and board and batten?
Board and batten is vertical battens on a field, typically full or partial height. Wainscoting is a framed lower-wall treatment with a top cap rail and rectangular panels.