Calc4Living

Home Renovation · Free calculator

Tile Calculator

Estimate tiles and optional boxes using your measured floor or wall area, tile dimensions, grout joint width and waste allowance.

Your project inputs

Prefilled measurements and product coverage are editable examples, not product or structural recommendations. All fields are required unless marked optional.

Changing units converts current measurements, product coverage and price per area. Results clear when any input changes.

Measured dimension in the selected unit.

Measured dimension in the selected unit.

Actual tile dimension, not a coverage area.

Actual tile dimension, greater than zero.

0.3 cm = 3 mm. Used in a repeating tile-and-joint area model, not a cutting layout.

Optional extra material added to the estimate. Blank or 0 means no allowance.

Positive whole number from the supplier.

Your estimate

Materials & purchasing quantities

Review the example values, enter your measurements and product specifications, then calculate. Results clear whenever inputs change.

How many tiles do I need for my floor or wall?

Tile face area = tile length × tile width. Estimated repeating module area = (tile length + grout width) × (tile width + grout width). Required tile count = ceiling[area × (1 + waste/100) ÷ module area]. Boxes = ceiling[required tiles ÷ tiles per box]. Purchased quantities include all tiles in whole boxes.

Worked example

For 12 m², 30 × 30 cm tiles and 0.3 cm grout joints, each module covers 0.091809 m². With 10% waste, ceiling(13.2 ÷ 0.091809) = 144 tiles. Boxes of 10 require 15 boxes (150 purchased tiles), whose actual tile faces total 13.5 m².

Unit conversions

1 ft = 0.3048 m; 1 in = 0.0254 m; 1 cm = 0.01 m. Area conversions use squared length factors, and volume conversions use cubed factors. 1 yd³ = 27 ft³ = 0.764554857984 m³; 1 L = 0.001 m³.

Assumptions & limitations

  • This is an area-based repeating-module estimate, not a row-by-row cutting layout. Grout is included as spacing between tiles, not incorrectly added to a tile face dimension in square units.
  • Boundary joints, perimeter cuts, orientation and reuse of offcuts affect actual counts. Wide grout joints make the module approximation less reliable for small areas. Use a layout plan before ordering.
  • Add waste for cuts, patterns, breakage and spares. Diagonal or intricate patterns may need more. Tile-face coverage excludes grout; estimated module coverage includes joint space. Adhesive and grout quantities are not calculated.