PROJECT PLANNING TOOL
Know how many tiles and boxes to buy, with every assumption in view.
A practical order estimate for a straight tile layout.
Before waste
Including your waste allowance
Add an optional unit price to estimate materials.
For dimensions, each area is counted as a straight grid; results are added together.
No account. No upload. Calculations run in this browser.
THE DETAILS
Rectangular tiles and one or more rectangular areas, or a single total-area estimate. Tile length and width accept 1–3000 in in US mode. Metric mode accepts the same physical range, 2.54–7620 cm. Area and room dimensions must be positive. The joint width must be zero or greater.
For each rectangle: tiles across = ceil((width + joint) ÷ (tile width + joint)); tiles down uses the lengths the same way. Multiply those values, then add the areas' tile counts. For total area: tiles needed = ceil(area ÷ ((tile length + joint) × (tile width + joint))). Purchase tiles = ceil(tiles needed × (1 + your waste % ÷ 100)). Boxes = ceil(purchase tiles ÷ tiles per box). Full-box tiles = boxes × tiles per box.
The grid estimate counts a tile at each edge as a whole tile and does not assume offcuts can be reused. Total-area mode cannot know the shape, edge cuts, or obstacles. Tiles are assumed to run in the length and width directions you enter. Use your chosen waste allowance for breakage and extra cuts, then confirm quantities with your installer or supplier.
COMMON QUESTIONS
Yes. Both names refer to estimating how many tiles a measured surface needs. This tool also turns the estimate into whole boxes using the box size you enter.
Use length and width when you know each rectangular area. That counts rows and columns, including edge tiles. Use total area when only square footage or square meters is available; the result is less specific because the shape is unknown.
Yes. The tool applies your editable extra percentage to the tile count, rounds up to whole tiles, then rounds up again to whole boxes. Recommended purchase is the count including waste; actual tiles to buy includes any extras from buying full boxes.
Enter your own price per tile or per box and choose its currency. The estimate multiplies a per-tile price by the actual tiles in full boxes, or a per-box price by the box count. It covers tile materials only and excludes tax, delivery, labor and grout. If you leave the price empty, no cost is assumed.
WORKED EXAMPLE
One cut, two pieces: check the remaining length — a consumed cut width can make a second piece too short.
Trapezoid area: use perpendicular height — check parallel bases against a rectangle-and-triangle decomposition.
Labor quote tiers: compare marginal and all-area bases — audit explicit rate terms at the threshold.
Square feet: compare entered dimension bounds — retain nominal dimensions and endpoint products separately.
Existing stock: audit available tiles before ordering — separate damaged and reserved inventory from usable stock.
Installation quote: audit entered line items and scope — retain quantities, fixed delivery and an explicitly entered tax base.
Grout coverage: audit the manufacturer package basis — retain the product, tile row and joint column before rounding.
Square footage: audit overlapping rectangles — count shared floor once before ordering.
Labor quote minimum: subtotal, charge and break-even area — use your actual quote terms, with no assumed market prices.
Feet and inches: audit your square footage — retain each measurement note before converting the area.
Shower walls, openings and returns — keep field tile and niche accent tile in separate area ledgers.
Why 143 square feet can produce different tile counts — compare dimensions, tile direction and area-only inputs with the same allowance and box size.