Estimate tiles and boxes for floors, walls, backsplashes, showers, and other rectangular surfaces using tile size, deductions, editable waste, and optional box or price details.
Measure each rectangular floor or wall by multiplying length by width. Add multiple areas or enter a known total, then subtract openings or other untiled areas.
CalcRocket converts measurements to meters and square meters internally. The primary material estimate applies waste to net area once, divides by raw tile area, and rounds the purchase count upward.
area = length × width × quantitynet area = gross area − deductionstile area = tile length × tile widthrecommended area = net area × (1 + waste % ÷ 100)ceiling(recommended area ÷ tile area)columns = ceiling((surface length + joint) ÷ (tile length + joint)); rows use the same methodceiling(recommended area ÷ box coverage), or ceiling(tiles to buy ÷ tiles per box)A 10 ft × 12 ft floor is 120 ft². A 12 in × 24 in tile is 2 ft². With 10% waste, 132 ft² requires exactly 66 tiles; at 6 tiles per box, buy 11 boxes.
An 80 ft² wall minus a 12 ft² window leaves 68 ft². With 10% waste and 12 in × 12 in tiles, 74.8 exact tiles rounds to 75.
A known 20 m² area with 300 mm × 600 mm tiles needs 22 m² after 10% waste. At 0.18 m² per tile, 122.22 exact tiles rounds to 123.
Both use rectangular area; label separate surfaces to keep the breakdown clear.
Cuts, breakage, pattern, matching, and future repairs affect extra material. The editable 10% default is not universal.
Packaging varies. When both box methods are entered, manufacturer coverage is preferred and differences are reported.
Grout width affects approximate rows and columns, but it does not enlarge the physical tile used by the area method. The layout estimate assumes a straight rectangular grid, with no offset, diagonal layout, complex cuts, or cut reuse.
Subtract windows, doors, cabinets, or other untiled spaces only when appropriate. Irregular spaces can be divided into rectangular areas.
Optional pricing supports tile, box, or displayed square-area bases. It excludes mortar, thinset, grout, underlayment, waterproofing, trim, labor, delivery, and taxes.
Divide the recommended area, including your selected waste allowance, by one tile's converted area and round upward.
Multiply tile length by width after converting both dimensions to compatible units.
Waste varies by cuts, breakage, pattern, room shape, matching, and repair needs; adjust the editable percentage.
Yes. Add each rectangular room or wall as a separate area.
Multiply wall width by height and subtract untiled openings if appropriate.
Only subtract openings that will not receive tile; nothing is deducted automatically.
It changes approximate row and column spacing, but not the raw physical tile area used for material quantity.
A 12 in × 24 in tile has a nominal raw area of 2 ft², so one tile covers two square feet before cuts and waste.
Use manufacturer coverage per box or divide whole tiles needed by tiles per box and round upward.
Purchase quantities must cover the requirement and partial units generally cannot be purchased.
Complex layouts may need more waste, but no universal percentage applies; adjust the waste input for the project.
No. Reliable grout quantity also needs joint depth and product-specific information.