Measure your space
Measure the floor area, read the coverage per box, and choose an allowance for cuts and spare pieces. Enter the shelf price per box to estimate the purchase cost.
For a rectangular floor, multiply length by width. Split an irregular floor into rectangles, add their areas, and use the same area units as the coverage printed on the tile box. Use coverage per box, not the area of one tile, when ordering whole boxes.
Worked example
Example: an 8 × 10 ft floor is 80 sq ft. A chosen 12% extra allowance makes 89.6 sq ft. If each box covers 12 sq ft, round 7.47 boxes up to 8. At an example price of $32 per box, the estimated cost is $256.
The formula
Boxes = round up [area × (1 + extra percentage ÷ 100) ÷ coverage per box].
Before you buy
The allowance in this example is a chosen input, not a universal rule. Layout, cuts, and the material can change the amount you need.
Multiply the whole-box count by the price per box. Adhesive, grout, trim, delivery, and installation are separate costs. Choose extra material for your own layout and supplier guidance; the example percentage is not a recommendation for every pattern.
Keep the result in FixCalc
FixCalc is free to download. All calculators and complete results are free. Free saves up to 3 estimates in 1 project. FixCalc Pro Lifetime is one purchase for unlimited projects and saved estimates plus shopping-list PDF export.