What the Gallery Wall Planner actually calculates
Rows are frame count divided by columns, rounded up. Width uses the smaller of frame count and selected columns; height uses the rounded row count, with gaps between cells. The tool assumes equal-size grid cells and does not reserve empty columns beyond the frame count. It does not arrange mixed frame sizes or center a partial row.
The calculation path
Column and row counts combine frame dimensions and consistent gaps into one overall footprint.
Inputs that can change the answer
- Number of frames: Enter number of frames as a number; use the definition in the calculation method.
- Columns: Enter columns as a number; use the definition in the calculation method.
- Average frame width: Enter average frame width in m.
- Average frame height: Enter average frame height in m.
- Gap: Enter gap in m.
Checks that stay outside the formula
Lay frames on the floor and photograph the arrangement before transferring it to the wall.
A practical order for entering the data
- Enter the whole number of frames and the intended number of columns.
- Measure outside frame width and height, then choose a consistent gap in metres.
- Check the resulting grid footprint on the wall and plan how to align any incomplete final row.
Project walkthrough: Wall finishes: wallpaper, panels, and gallery layouts
Project walkthrough: Plan a gallery wall from display area to frame spacing
Engine check using the prefilled sample
Worked example: number of frames = 8, columns = 3, average frame width = 0.35 m, average frame height = 0.45 m and gap = 0.07 m. Replace the sample wall and item dimensions with the exact section and product format involved in your layout.
Results for these inputs
- Rows
- 3 rows
- Gallery width
- 1.19 m
- Gallery height
- 1.49 m
- Layout note
- Use 3 columns across 3 rows
The last row may contain fewer frames.