Opuslay — tile pattern layout calculatorOpuslay

Opus Romano Pattern — 8x16, 16x16 & 24x24

This Opus Romano variant works from three tile sizes — 8"x16", 16"x16" and 24"x24" — built around a single large 24"x24" square per module. It keeps the interlocking logic of the full 5-size Opus Roman pattern, where a fixed set of sizes repeats to a fixed scheme rather than being laid at random, but resolves it in far fewer pieces, closer in spirit to the large-format 3-size version.

Compact 3-Size Opus Romano Pattern

Opuslay — tile layout worksheet
Room:
3 m × 2.5 m
Units:
Metric (cm / m²)
Anchor:
Left · Top
Layout angle:
Straight
Tile colours:
Single colour
40x40 cm (cut)40x40 cm20x40 cm60x60 cm (cut)20x40 cm (cut)40x40 cm (cut)20x40 cm60x60 cm20x40 cm40x40 cm20x40 cm60x60 cm20x40 cm40x40 cm20x40 cm60x60 cm20x40 cm40x40 cm20x40 cm60x60 cm (cut)20x40 cm (cut)60x60 cm (cut)20x40 cm40x40 cm20x40 cm (cut)60x60 cm20x40 cm40x40 cm20x40 cm60x60 cm20x40 cm40x40 cm20x40 cm60x60 cm (cut)20x40 cm (cut)60x60 cm (cut)20x40 cm40x40 cm60x60 cm20x40 cm40x40 cm20x40 cm60x60 cm20x40 cm40x40 cm20x40 cm60x60 cm (cut)40x40 cm (cut)20x40 cm20x40 cm60x60 cm (cut)20x40 cm (cut)60x60 cm (cut)
60x60 cm20x40 cm40x40 cm20x40 cm

Material breakdown

Compact 3-Size Opus Romano Pattern material breakdown for a 3 m × 2.5 m room
FormatQty / PatternShareQty / RoomArea / Room
60x60 cm152.9%153.90 m²
20x40 cm223.5%251.78 m²
40x40 cm123.5%131.82 m²
Total4100%537.50 m²

What you'll need to buy

Tiles to buy

20x40 cm26 tiles2.08 m²
40x40 cm15 tiles2.40 m²
60x60 cm13 tiles4.68 m²

Total 54 tiles · 9.16 m² (incl. 22% cuts & breakage)

Adhesive & grout

  • Thin-set adhesive: ≈ 40.5 kg (2 × 50 lb bags) — recommended trowel: 12mm notch, large format
  • Grout — the tile sets the joint width, not you:
    • ≈ 1.6 kg (1 × 10 lb bag) — 3mm joint, rectified / tight-set tile
    • ≈ 2.7 kg (1 × 10 lb bag) — 5mm joint, natural or non-rectified tile

Adhesive: allow a little over on an uneven substrate, or if you back-butter large tiles — both eat more than a flat bed.

Grout: the 25 lb bag is the usual size (10 lb for small jobs). Buy it in one go and stick to a single bag size: bags from different batches can dry to slightly different shades.

It's the tile that decides the joint, not the setter — dry-lay a section to find your width. Assumes 9.5mm tile depth; adjust for your product — thicker tiles need more.

Only need the grout figure? Open the grout calculator →

See the full 5-size Opus Roman (8x8, 8x16, 16x16, 16x24, 24x24)See the 3-size version (16x16, 16x24, 24x24)See the plank-format version (8x32, 16x32, 32x32)See the 3-size version with diagonal banding (8x8, 8x16, 16x24)See the more irregular 3-size version (8x8, 8x16, 16x24)