How many 4x12 tiles do I need?
10 × 10 ft room, 100 ft² · 4 × 12 in tile, straight lay
Buy 330 tiles
with 10% extra · 300 cover it exactly
- One tile
- 0.333 ft², 3.00 per ft²
- Grout
- 1 × 25 lb bagUltracolor Plus FA
Your numbers
Or type the area; the width follows
Optional, from the carton
At other areas
| Area | Exact | Straight | Diagonal |
|---|---|---|---|
| 25 ft² | 75 | 83 | 87 |
| 50 ft² | 150 | 165 | 173 |
| 100 ft² | 300 | 330 | 345 |
| 200 ft² | 600 | 660 | 690 |
| 500 ft² | 1,500 | 1,650 | 1,725 |
| 1,000 ft² | 3,000 | 3,300 | 3,450 |
Grout for this area
| Product | Pounds | Buy |
|---|---|---|
| MAPEIUltracolor Plus FA computed | 8.6 lb | 125 lb bag |
| LATICRETESPECTRALOCK PRO Premium by volume | sold by volume | 1Full unit, 0.8 gal |
| Custom Building ProductsPolyblend Sanded computed | 9.3 lb | 125 lb bag |
| Custom Building ProductsPrism computed | 6.3 lb | 117 lb box |
Thinset by trowel
| Trowel notch | ft² per bag | Bags |
|---|---|---|
| 1/4 × 1/4 × 1/4 square | 90–100 | 1–2 |
| 1/4 × 3/8 × 1/4 square | 60–67 | 2 |
| 3/4 × 9/16 × 3/8 U @45° | 34–42 | 3 |
| 3/4 × 9/16 × 3/8 U @30° | 38–47 | 3 |
Nearby sizes
- 6 × 6 in4.00 per ft²
- 4 × 16 in tile calculator2.25 per ft²
- 3 × 6 in tiles8.00 per ft²
- 4 × 4 in tiles9.00 per ft²
- 2 × 2 in36.00 per ft²
- 1 × 1 in tiles144.00 per ft²
Sources
Figures built September 2026.
Where these numbers come from (7)
- Coverage: Custom Building Products, “Polyblend® Sanded Grout / TDS-129”, 3/22/2023, retrieved from https://www.custombuildingproducts.com/TDS/TDS-129.pdf on 2026-09-24. Chart values are restated as numbers; no text or table is reproduced.
- Coverage: Custom Building Products, “Prism® Ultimate Performance Grout / TDS-128”, 6/20/2023, retrieved from https://www.custombuildingproducts.com/TDS/TDS-128.pdf on 2026-09-24. Chart values are restated as numbers; no text or table is reproduced.
- Thinset coverage: Custom Building Products, “VersaBond®-LHT Professional Large and Heavy Tile Mortar”, retrieved from https://www.custombuildingproducts.com/products/versabond-lft-professional-large-format-tile-mortar on 2026-09-24. Chart values are restated as numbers; no text or table is reproduced.
- Coverage: LATICRETE, “SPECTRALOCK® PRO Premium Grout†”, DS-681.0-0217, retrieved from https://cdn-global.laticrete.com/-/media/project/laticrete-international/north-america/product-documents/product-data-sheets/lds6810_spectralock-pro-premium-grout.ashx on 2026-09-24. Chart values are restated as numbers; no text or table is reproduced.
- Grout waste: LATICRETE, “SpectraLOCK PRO Grout Installation & Maintenance Guide, TDS 400 PRO”, R 9 October 2009, retrieved from https://cdn-global.laticrete.com/-/media/project/laticrete-international/shared/files/support-and-downloads/technical-datasheets/tds400-pro.ashx?la=en on 2026-09-24. Chart values are restated as numbers; no text or table is reproduced.
- Coverage: MAPEI, “Ultracolor Plus FA”, August 28, 2026, retrieved from https://cdnmedia.mapei.com/docs/librariesprovider67/products-documents/1_3000144_ultracolor-plus-fa_en-us_979a424a35724d82980fa0332f798319.pdf on 2026-09-24. Chart values are restated as numbers; no text or table is reproduced.
- Overage: TileBuys, “How to calculate tile needed”, retrieved from https://www.tilebuys.com/pages/how-to-calculate-tile-needed on 2026-09-24. Chart values are restated as numbers; no text or table is reproduced.
Quantities are estimates for buying materials. Actual use depends on tile variation, joint depth and installation; manufacturers publish their coverage figures for estimating only.