Tile Coverage Calculator
Utility
claycalc.com
Tile Coverage Calculator
Calculate how many tiles and how much clay you need to cover a wall or floor area.
Reviewed by ClayCalc Editorial · Updated
Results
Enter your measurements above and click Calculate.
Calculating Tile Coverage
When planning a ceramic tile installation, you need to know both how many tiles to produce and how much clay to prepare. This calculator works from the fired tile dimensions to determine coverage area, accounts for grout gaps and breakage waste, and calculates wet-state cutting dimensions based on clay shrinkage.
Shrinkage and Wet Dimensions
Clay shrinks during drying and firing. If your finished tile needs to be 15 × 15 cm and your clay shrinks 12%, you must cut the wet tile larger:
wet_size = fired_size ÷ (1 − shrinkage% ÷ 100)
// 15 cm ÷ (1 − 0.12) = 17.05 cm wet
Waste Allowance Guidelines
10%
Minimum for simple rectangular installations. Experienced tile makers with consistent results.
15%
Recommended standard. Covers breakage, cracking, and firing losses in a typical batch.
20–25%
Complex patterns, diagonal layouts, intricate cuts, or first-time tile production.
Method & review note
About this calculation
Uses standard geometry or unit conversion. Handmade forms and named sieve standards should be physically verified when tolerances matter.
Reference: NIST — SI Units. See the editorial methodology for testing, precision and corrections.
Input handling: Values are sent to the ClayCalc server for this request and are not written to the application database.