4x12 & 8x8 Windmill Tile Pattern Calculator
This layout repeats a 16x16 module of five tiles in two sizes — four 4x12 and one 8x8. The same tile sizes are laid to a different module in Windmill Pattern.
4x12 & 8x8 Windmill
Opuslay — tile layout worksheet- Room:
- 3 m × 2.5 m
- Units:
- Metric (cm / m²)
- Anchor:
- Left · Top
- Layout angle:
- Straight
- Tile colours:
- Single colour
Material breakdown
| Format | Qty / Pattern | Share | Qty / Room | Area / Room |
|---|---|---|---|---|
| 10x30 cm | 4 | 75.0% | 202 | 5.70 m² |
| 20x20 cm | 1 | 25.0% | 48 | 1.80 m² |
| Total | 5 | 100% | 250 | 7.50 m² |
What you'll need to buy
Tiles to buy
| 10x30 cm | 202 tiles | 6.06 m² |
| 20x20 cm | 48 tiles | 1.92 m² |
Total 250 tiles · 7.98 m² (incl. 6% cuts & breakage)
Adhesive & grout
- Thin-set adhesive: ≈ 24.4 kg (2 × 50 lb bags) — recommended trowel: 10mm notch
- Grout — the tile sets the joint width, not you:
- ≈ 4.3 kg (1 × 10 lb bag) — 3mm joint, rectified / tight-set tile
- ≈ 7.1 kg (1 × 25 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.
Share & export
Save the 4x12 & 8x8 Windmill layout to your moodboard, or send the link to your tiler — it reopens with your room dimensions.
See the standard windmill (6x6 square, 6x12 rectangles)See the large-format metric windmill (400x300 rectangles, 100x100 square)See the small metric windmill (200x150 rectangles, 50x50 square)