Tile & Grout Calculator 📐

Average consumption typically ranges from 0.1 to 0.2 lbs per sq ft. Small mosaic tiles will always require much more grout weight than large 24x24 slabs because you have way more joint lines to fill per square foot.

The caliber is the actual finished size of the tile after it leaves the firing kiln[cite: 153]. High temperatures cause clay to shrink, so a nominal 12x12 tile might actually measure 11-7/8"[cite: 153]. Always double-check the caliber codes stamped on your boxes before mixing lots[cite: 153].

As a general rule, you should never tile directly over bare wood. Plywood flexes and expands with humidity, which instantly cracks tiles and crumbles grout. Installing an approved cement backer board or uncoupling membrane is highly recommended, but always verify your subfloor deflection matches industry ANSI A108 standards before proceeding.

We strongly recommend adding a 10% waste factor to your project[cite: 154]. You will inevitably lose material to corner cuts, waste layout profiles, and accidental breakages[cite: 154]. Plus, having a few spare tiles from the exact same dye lot is crucial for future repairs[cite: 154].