tilegroutcalc

Bathroom tile calculator

Bathroom, 40 ft² · 12 × 12 in tile, straight lay

Width 96 in · Length 60 in

Buy 44 tiles

with 10% extra · 40 cover it exactly

Grout
1 × 25 lb bagUltracolor Plus FA

Your numbers

Tile size
Layout
Optional, from the carton
The bathroom surfaces laid with 12 × 12 in tiles, straight 60 in 96 in Width Whole tiles Cut at the edges 40 cover it · 44 to buy

The usual sizes here

4 sizes for this bathroom, 40 ft², in your layout.
SizeExactBuyGrout
12 × 12 in 40 44 2.0–2.9 lb
12 × 24 in 20 22 1.5–2.2 lb
24 × 24 in 10 11 1.0–1.5 lb
2 × 2 in 1,440 1,584 7.1–10.4 lb

Grout for this area

40 ft² at a 1/8 in joint, 3/8 in tile. Units include 10% extra.
ProductPoundsBuy
MAPEIUltracolor Plus FA chart 2.6 lb 125 lb bag
LATICRETESPECTRALOCK PRO Premium by volume sold by volume 1Full unit, 0.8 gal
Custom Building ProductsPolyblend Sanded chart 2.9 lb 125 lb bag
Custom Building ProductsPrism chart 2.0 lb 117 lb box
TECPower Grout chart (5/16 in row) 2.3 lb 125 lb bag

Other surfaces

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.
  • 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.
  • Coverage: H.B. Fuller Construction Products, “TEC® Power Grout® Product Data”, DS550 R0317-20, retrieved from https://pdf.lowes.com/installationguides/082093558101_install.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.