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Gallery wall spacing: the arithmetic of several pieces in a row
Total width = number of pieces x piece width + (number of pieces - 1) x gap. Three 12 inch wide pieces with 2 inch gaps take 3 x 12 + 2 x 2 = 40 inches (101.6 cm) of wall.
Three 12 inch pieces, 2 inch gaps (drawn to scale).
Total width with 2 inch gaps
Piece width is the shorter side, as when each piece is hung portrait. Gaps of 2 and 3 inches are examples; choose your own.
| Size (in) | Piece width | 2 pieces | 3 pieces | 4 pieces | 5 pieces |
|---|---|---|---|---|---|
| 8 x 10 | 8 in | 18 in (45.7 cm) | 28 in (71.1 cm) | 38 in (96.5 cm) | 48 in (121.9 cm) |
| 10 x 10 | 10 in | 22 in (55.9 cm) | 34 in (86.4 cm) | 46 in (116.8 cm) | 58 in (147.3 cm) |
| 12 x 12 | 12 in | 26 in (66.0 cm) | 40 in (101.6 cm) | 54 in (137.2 cm) | 68 in (172.7 cm) |
| 12 x 18 | 12 in | 26 in (66.0 cm) | 40 in (101.6 cm) | 54 in (137.2 cm) | 68 in (172.7 cm) |
| 16 x 20 | 16 in | 34 in (86.4 cm) | 52 in (132.1 cm) | 70 in (177.8 cm) | 88 in (223.5 cm) |
| 18 x 24 | 18 in | 38 in (96.5 cm) | 58 in (147.3 cm) | 78 in (198.1 cm) | 98 in (248.9 cm) |
| 20 x 30 | 20 in | 42 in (106.7 cm) | 64 in (162.6 cm) | 86 in (218.4 cm) | 108 in (274.3 cm) |
| 24 x 36 | 24 in | 50 in (127.0 cm) | 76 in (193.0 cm) | 102 in (259.1 cm) | 128 in (325.1 cm) |
Total width with 3 inch gaps
| Size (in) | Piece width | 2 pieces | 3 pieces | 4 pieces | 5 pieces |
|---|---|---|---|---|---|
| 8 x 10 | 8 in | 19 in (48.3 cm) | 30 in (76.2 cm) | 41 in (104.1 cm) | 52 in (132.1 cm) |
| 10 x 10 | 10 in | 23 in (58.4 cm) | 36 in (91.4 cm) | 49 in (124.5 cm) | 62 in (157.5 cm) |
| 12 x 12 | 12 in | 27 in (68.6 cm) | 42 in (106.7 cm) | 57 in (144.8 cm) | 72 in (182.9 cm) |
| 12 x 18 | 12 in | 27 in (68.6 cm) | 42 in (106.7 cm) | 57 in (144.8 cm) | 72 in (182.9 cm) |
| 16 x 20 | 16 in | 35 in (88.9 cm) | 54 in (137.2 cm) | 73 in (185.4 cm) | 92 in (233.7 cm) |
| 18 x 24 | 18 in | 39 in (99.1 cm) | 60 in (152.4 cm) | 81 in (205.7 cm) | 102 in (259.1 cm) |
| 20 x 30 | 20 in | 43 in (109.2 cm) | 66 in (167.6 cm) | 89 in (226.1 cm) | 112 in (284.5 cm) |
| 24 x 36 | 24 in | 51 in (129.5 cm) | 78 in (198.1 cm) | 105 in (266.7 cm) | 132 in (335.3 cm) |
Use it with your wall
- Pick the piece width and a gap.
- Read the total for the number of pieces.
- Check the total against your wall in the wall fit calculator.
Pieces hung landscape use the longer side as the piece width instead. For sets of three of the same size with cost, see set of three: widths and cost.
Related
Sources: Prices, GST rates and sizes: ArtzFolio Custom rate card (our price list file, generated 2026-11-10). 1 inch = 2.54 cm exactly: NIST and Wikipedia. All other figures are arithmetic shown on this page. Data as of 2026-11-10; page checked 2026-11-12. Always confirm the live price in the studio before ordering.