Tile Calculator
Plan floor or wall tiles with grout gap adjustment.
How does the tile calculator work?
The tile calculator estimates the number of tiles needed for a rectangular area by dividing the surface width and height by the tile pitch (tile size plus grout gap). It calculates tiles per row and rows per column, rounds up to whole tiles, and then adds a waste percentage for cuts, breaks, and future repairs. Enter your surface dimensions, tile size, grout gap (typically 2–5 mm), and waste (5–15%), and the calculator instantly gives you the total tile count — no guesswork, no shortages.
How to use the Tile Calculator
Measure the width and height of the area you want to tile. Enter the tile dimensions and the planned grout gap width. Set the waste percentage (10% is recommended for straight lay, 15% for diagonal). Choose meters or feet, then click "Calculate" to see the total number of tiles you should purchase.
Example calculation
Area 4 m × 3 m, tile 0.25 m × 0.25 m, grout 3 mm (0.003 m), waste 10%: Tiles per row ≈ 4 ÷ 0.253 ≈ 15.8 → 16; Rows ≈ 3 ÷ 0.253 ≈ 11.9 → 12. Base total = 16 × 12 = 192 tiles. With 10% waste = 211.2 → 212 tiles. The calculator does all the rounding and math automatically.
Frequently Asked Questions
What grout gap should I use?
Standard floor tiles typically use 3–5 mm gaps. Wall tiles often use 2–3 mm. Rectified tiles (precision-cut) can use 1.5–2 mm. Always check the manufacturer's recommendation for your specific tile type.
How much extra should I buy for waste?
For a simple rectangular layout, 5–10% extra is usually sufficient. For diagonal patterns, rooms with many corners, or large-format tiles, 15% or more is safer. Always keep a few spare tiles for future repairs.