Wall Panel Calculator
Decorative panels tile a wall in a grid rather than hanging in drops. The drawing shows how many fit and exactly which ones get cut.
Sheet 8 of 9
A grid of fixed panels, so the interesting question is where the cuts land. The drawing hatches every panel that gets trimmed.
Panels behind an opening are still bought. The offcut share is reported rather than hidden.
Order
14panels
6 across × 2 high = 12 × 1.10 waste → 14 panels
- Panels across
- 6
- Rows high
- 2
- To cover the wall
- 12
- Wall area
- 96 sq ft
- Trim off the last column
- 0 in
- Offcut share
- 14%
Panels are a grid, not drops
A DIY wall panel calculator has a different job from a wallpaper one. Wallpaper hangs in full-height strips, so a wallpaper calculator only has to count across. Decorative panels come in fixed rectangles that tile in both directions, so the count is a grid and the interesting question is where the cuts land.
That is why the drawing above hatches every panel that gets trimmed. Two layouts can need the same number of panels and look completely different: one with a full panel at each end and the cut in the middle, one with a sliver at the right-hand edge. The arithmetic does not care and your eye does.
This sheet is for panels sold at a fixed size. If you are planning board and batten, where you choose the spacing and divide the wall to suit, that is a different problem and this is not the tool for it. For partial-height panelling with a cap rail, use the wainscoting sheet. For printed mural panels that make one picture, use the mural sheet.
How the wall panel sheet works
Measure the wall, not the room
Width and height at the widest points. Panel a wall at a time: each one rounds up separately, so four walls need more panels than their combined width suggests.
Take the panel face size from the listing
Some listings give the overall size and some the covering size after the tongue or overlap. Use the covering size if both are given.
Set the gap if the design has one
Slat and reveal designs sit apart by a fixed amount. That spacing is part of the pitch and changes the count.
Check where the cut panels land
The drawing hatches every panel that gets cut. A sliver at one end usually looks wrong; centring the layout so both edges are cut equally looks better and costs the same.
Panels for a 12 × 8 ft wall
| Panel size | Across | High | Total | Trim off the edge |
|---|---|---|---|---|
| 12 × 12 in | 12 | 8 | 96 | none |
| 24 × 24 in | 6 | 4 | 24 | none |
| 24 × 48 in | 6 | 2 | 12 | none |
| 16 × 96 in | 9 | 1 | 9 | 0 in |
| 18 × 96 in | 8 | 1 | 8 | 0 in |
| 20 × 96 in | 8 | 1 | 8 | 16 in |
A 12 ft wall divides exactly by 12, 24, 16, and 18 in, so those layouts leave nothing to trim. At 20 in it does not: eight panels span 160 in and 16 in is cut off, most of a whole panel wasted. Panel size is worth choosing around your wall rather than the other way round.
Other sheets
- 1Wallpaper CalculatorMulti-wall strip method
- 2Accent Wall CalculatorSingle-wall strip method
- 3Wallpaper Mural CalculatorPanel grid
- 9Wainscoting CalculatorLinear run and height
Nothing on this site is for sale.
Questions people ask
How do I measure for wall paneling?
Measure the wall width and height at the widest points, then get the panel face size from the product listing. Divide width by panel width and round up, do the same for height, and multiply. Add a gap or reveal if the panels are designed to sit apart rather than butt together.
How do I calculate how many wall panels I need?
Panels across = ceil(wall width ÷ (panel width + gap)). Rows high = ceil(wall height ÷ (panel height + gap)). Multiply the two, then add waste for breakage and mis-cuts. The calculator above does it and draws the grid so you can see where the cut panels fall.
What size are wall panels?
There is no standard. Decorative MDF and PVC panels commonly come in widths from 12 to 48 in and heights from 24 in to full wall height; 3D panels are often square at 12 to 24 in. Slat panels are usually sold as full-height boards. Take the size from your listing rather than assuming.
How many wall panels do I need?
The count above, for your wall and panel size. As a reference point, a 12 ft × 8 ft wall covered with 24 × 48 in panels needs 6 across and 2 high, so 12 panels before waste.
How much do wall panels cost?
This site does not quote prices, which vary by material, finish, and supplier. What it gives you is the panel count and the offcut share, which is what you need before comparing quotes: a cheaper panel that leaves 30% offcut on your wall is not cheaper.
How do I calculate wall panels with a gap between them?
Enter the gap on the ticket. The spacing is added to the panel pitch, so panels across becomes ceil(wall width ÷ (panel width + gap)). A reveal of even a quarter inch changes the count on a wide wall.
Is this the same as a board and batten calculator?
No. Board and batten is a spacing layout problem: you choose how many battens look right and divide the wall between them. This sheet tiles fixed-size panels across a wall and tells you how many to buy. The two produce different numbers and are not interchangeable.