Gallery Wall Layout Calculator

Work out gallery wall layout instantly with clear inputs, formula shown and shareable results.

About Gallery Wall Layout Calculator

The arrangement is frames times frame width plus one gap fewer than the number of frames, and centring leaves half the leftover width at each side. The frames-minus-one gap rule is what makes a five frame row 32 cm narrower than a naive calculation with five gaps.

Formulas

Arrangement width

width = frames x frame width + (frames - 1) x gap

Side margin

margin = (wall width - arrangement width) / 2

Worked example

With the default values below, Gallery Wall Layout Calculator returns Total width of the arrangement of 232.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Available wall widthminimum 1 cm: 300 cm
Number of framesminimum 1: 5
Width of each frameminimum 1 cm: 40 cm
Preferred gap between framesminimum 0 cm: 8 cm

Results

Total width of the arrangement: 232.00 cm
Margin at each side: 34.00 cm
Fit assessment: Fits with 34 cm each side
Most frames that would fit: 6

Step by step

1Values used
2Arrangement width
3Side margin
4Total width of the arrangement= 232.00 cm
5Margin at each side= 34.00 cm
6Fit assessment= Fits with 34 cm each side
7Most frames that would fit= 6

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Gallery Wall Layout figure worked out?

width = frames x frame width + (frames - 1) x gap. The arrangement is frames times frame width plus one gap fewer than the number of frames, and centring leaves half the leftover width at each side.

Why does this matter?

The frames-minus-one gap rule is what makes a five frame row 32 cm narrower than a naive calculation with five gaps.

What do I need to enter?

Enter available wall width, number of frames, width of each frame, preferred gap between frames. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.