Tile Calculator
How many tiles for a floor? Area, waste allowance, packs and cost.
The Tile Calculator tells you exactly how many tiles a floor needs: enter the room's length and width, pick the tile size, set a waste allowance, and read the tile count, box count and estimated material cost.
Ordering tiles is a two-trap game: too few means a stalled project and mismatched dye lots from a second order; too many means wasted money. Professional practice is a 10% waste allowance for straight layouts — more for diagonal or patterned designs where cutting multiplies. The tool builds that allowance in and shows the math.
Costs are estimated from a price per square meter you enter, so the total reflects your actual tile choice. Everything computes locally in your browser — measure twice, calculate once, order once.
Floor area
12.00 m²
Tiles needed
38
34 + 4 waste
≈ 10-packs
4
tiles per box varies by brand
Estimated cost
—
add a price per m²
The waste allowance covers cutting, breakage and pattern matching — 10% is typical for square rooms, 15%+ for diagonal or patterned layouts.
How to use the Tile Calculator
- Enter the floor length and width in meters.
- Pick the tile size (10–100 cm).
- Set the waste allowance (10% is typical).
- Optionally add the tile price per m².
- Read the tiles needed, packs to buy and cost.
Frequently asked questions
Why do I need a waste allowance?
Tiles must be cut at walls, corners and around pipes; some break during cutting or transport. Straight layouts waste ~10%, diagonal and patterned layouts 15%+. Skipping the allowance risks running out mid-job.
How do I calculate tiles for a room?
Floor area = length × width. Each tile covers (size ÷ 100)² m². Tiles = area ÷ tile area, rounded up, plus your waste percentage. The calculator does all of it, including rounding up to whole boxes.
Does this include grout lines?
No — grout gaps are small enough (usually 2–5 mm) that they rarely change the count for rooms this calculator sizes. For very large-format tiles on big floors, the effect is still under a few percent.
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