Grout calculator
100 ft² of 12 × 12 in tile, 3/8 in thick, 1/8 in joint
4.9–7.2lb of grout
by weight, 5 products compared below
- Your grout
- 1 × 25 lb bagUltracolor Plus FA · 6.4 lb
Your numbers
Every grout, side by side
| Product | Pounds | Buy |
|---|---|---|
| MAPEIUltracolor Plus FA chart | 6.4 lb | 125 lb bag388 ft² each |
| LATICRETESPECTRALOCK PRO Premium by volume | sold by volume | 1Full unit, 0.8 gal164 ft² each |
| Custom Building ProductsPolyblend Sanded chart | 7.2 lb | 125 lb bag348 ft² each |
| Custom Building ProductsPrism chart | 4.9 lb | 117 lb box348 ft² each |
| TECPower Grout chart (5/16 in row) | 5.7 lb | 125 lb bag437 ft² each |
Grout fills the joints: joint width × tile thickness × joint length per square foot, times the grout's weight per volume, plus 10% waste. Where a maker prints a chart cell for your tile and joint, that cell is used instead.
By brand
- MAPEI1 product
- LATICRETE grout1 product
- Custom Building Products grout calculator2 products
- TEC1 product
Sources
Figures built September 2026.
Where these numbers come from (6)
- 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.
Quantities are estimates for buying materials. Actual use depends on tile variation, joint depth and installation; manufacturers publish their coverage figures for estimating only.