Home & Furniture calculator
What Gallery Wall Size Do I Need?
Use your measurements for available wall width, available wall height, and number of columns to find gallery wall footprint.
Enter your measurements
For what gallery wall size do i need, use the real measurements for available wall width, available wall height, and number of columns. The calculator then reports gallery wall footprint and keeps any manufacturer- or rule-specific checks separate.
- Available wall width — Required
- Available wall height — Required
- Number of columns — Required
- Number of rows — Required
- Frame width — Required
- Frame height — Required
- Gap between frames — Required
Gallery wall footprint
Enter the measurements above to calculate gallery wall footprint.
How the calculation works
V12 calculation: gridWidth=columns×frameWidth+(columns-1)×gap; gridHeight=rows×frameHeight+(rows-1)×gap; fitPass=gridWidth≤wallWidth AND gridHeight≤wallHeight. This is the implementation rule for this calculator.
Worked example
Example: Available wall width = 240 cm; Available wall height = 180 cm; Number of columns = 3; Number of rows = 3; Frame width = 30 cm; Frame height = 40 cm; Gap between frames = 8 cm. Result: Fits; Grid Height = 136 cm; Grid Width = 106 cm.
Before you decide
Use measured dimensions rather than nominal labels. This page calculates the stated geometry or quantity only; product-specific construction or installation details can still affect the final choice. For what gallery wall size do i need, the limiting result on this page is gallery wall footprint.
Direct measurement/geometry calculation. No external reference is required for the arithmetic itself; the result is derived only from the user-entered measurements and the formula stored in calculationLogicJson.
Frequently asked questions
What does the Gallery Wall Size calculator tell me?
It returns gallery wall footprint from the measurements entered on this page. The calculation is specific to gallery wall size, so the result should be compared with the exact product or specification you are considering.
Which measurements should I take for gallery wall size?
Measure available wall width, available wall height, number of columns, number of rows, frame width, frame height, gap between frames. Use clear, usable dimensions rather than nominal room or product labels.
Should I round the gallery wall footprint?
Keep the calculated value for comparison, then choose a real product that meets or stays within the returned gallery wall footprint while allowing for the clearances, tolerances or ratings shown by its manufacturer.