Gallery Wall Spacing Calculator
Calculate even spacing for multiple frames in rows or grids. Get exact measurements for professional-looking gallery walls.
Gallery Wall Spacing Calculator
Preview
How to Use This Calculator
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1
Measure your wall space
Measure the available width of your wall section. For grid layouts, also measure the available height.
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2
Enter frame details
Input the frame width (and height for grids) plus the number of frames you want to hang.
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3
Set spacing (optional)
Enter a custom gap between frames, or leave it empty and the calculator will find the optimal even spacing automatically.
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4
Read the positions table
Each frame’s left edge and centre position is measured from the left wall. The centre position is where your nail goes.
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5
Mark and hang
Transfer the measurements to your wall with a tape measure, then use the single-frame calculator to find the nail height for each frame.
Getting Gallery Wall Spacing Right
Spacing is the single biggest factor in whether a gallery wall looks intentional or accidental. Frames that drift between 40mm gaps in one spot and 90mm gaps in another read as crooked even when every frame is perfectly level, because the eye picks up on inconsistent negative space far more readily than on a frame that is a few millimetres off-centre. This calculator removes that variability by computing one consistent gap and the exact left and top margins that centre the whole arrangement on your wall.
How tight should the gaps be?
There is no single correct number, but there are reliable ranges. For frames of similar size hung in a row or grid, 50–75mm (2–3 inches) is the sweet spot used by most galleries and framers. Go tighter, around 25–50mm, when the frames share a common style and you want them to read as one large composition — for example a 3×3 grid of identical black frames. Go wider, 75–100mm, when the pieces are visually busy or the wall is large, so each piece keeps its own breathing room. Beyond about 150mm the frames stop reading as a group at all.
A worked example
Wall: 2,400mm wide section between a door frame and a corner. Frames: four identical 400mm-wide frames in a single row.
Total frame width = 4 × 400mm = 1,600mm, leaving 800mm of empty space. With a 60mm gap between frames, the three gaps use 180mm, so 620mm remains for the two outer margins — 310mm each side. The first frame's left edge sits 310mm from the door frame; each subsequent frame starts 460mm (400 + 60) after the previous one. The calculator does exactly this arithmetic and then converts frame positions into nail positions using your hook drop.
Margins matter as much as gaps
A common mistake is computing perfect gaps between frames and then jamming the whole arrangement against one end of the wall. As a rule, the outer margins should be at least 1.5× the gap between frames, and ideally much more. If the calculator reports a left/right margin smaller than about 100mm, the arrangement is too wide for the wall — remove a frame, shrink the gap, or rethink the layout rather than crowding a corner.
Vertical spacing in grids
For grids, vertical gaps should match horizontal gaps unless your frames are strongly landscape or portrait. With landscape frames, a slightly smaller vertical gap (around 80–90% of the horizontal gap) often looks more balanced because the eye perceives vertical space as larger than it is. The calculator lets you set the two independently, so you can try both and compare in the preview.
Marking the wall without losing your mind
Once you have positions, work from a single datum. Mark the height of the top row of nails with a pencil line (a laser level is ideal, but a long spirit level works), then measure each nail's horizontal position from the same wall edge — not from the previous nail. Measuring nail-to-nail compounds errors: being 3mm off on each of five frames leaves the last one 15mm out of place. Measuring everything from one edge means each frame carries only its own error.
Mixed frame sizes
This calculator assumes frames of equal size, which is what makes even spacing computable. If your frames are different sizes, you have two options: use the Salon Wall Calculator, which is designed for mixed-size arrangements, or align frames by their centres rather than their edges — centre-aligned rows of mixed frames tolerate small size differences well, while edge-aligned ones do not.
Frequently Asked Questions
Do I measure the wall to the corner or to the skirting/architrave?
Measure the flat, usable wall area — from the edge of the door architrave to the corner, for example, not the full structural wall. The calculator centres the arrangement within whatever width you give it, so the number you enter should be the space the frames can actually occupy.
My frames have different hook drops. Does that break the layout?
No — it only changes the nail heights, not the frame positions. The layout maths positions the frames; each nail is then placed at the frame's top edge minus that frame's hook drop. If one frame hangs from a wire and another from a sawtooth, measure each hook drop separately and adjust those nails individually.
Should a gallery wall be centred on the wall or on the furniture below it?
Centre it on the furniture if there is a sofa, console, or bed below — the eye groups the art with the furniture, not with the wall edges. Enter the furniture width as your wall space and the arrangement will centre over it. Only centre on the full wall when the wall is empty.
What if the calculated spacing comes out negative or tiny?
That means your frames physically don't fit at any sensible spacing. Drop one frame from the row, switch to a grid (two rows of three instead of one row of six), or use smaller frames. Never go below about 20mm of gap — frames that nearly touch highlight every tiny alignment error.
What's the ideal spacing between gallery wall frames?
For most gallery walls, 50-75mm (2-3 inches) between frames works well. Tighter spacing (25-50mm) creates a cohesive, modern look, while wider spacing (75-100mm) gives each piece more visual breathing room. This calculator automatically finds the optimal spacing based on your wall and frame sizes.
Should spacing be equal all around?
For grid layouts, yes - consistent spacing creates visual harmony. This calculator ensures equal horizontal spacing between frames and equal margins on the sides. For salon-style arrangements, you can vary the spacing slightly, but keep it within a range (e.g., 40-60mm) for coherence.
How much wall space should I leave as margin?
Leave at least 100-200mm (4-8 inches) from edges like corners, doors, or furniture. The wall margins calculated by this tool ensure your gallery is centred with appropriate breathing room. If the calculated margin seems too small, consider using fewer frames or a narrower wall section.