10 × 10 ft floor, 12 × 12 in tiles
10 × 10 ft = 100 sq ft. With 10% waste, allow 110 sq ft. A 12 × 12 in tile covers 1 sq ft, so you need 110 tiles.
Tile Calculator
Estimate tiles for a floor or wall using dimensions in feet or a known total area. Enter tile dimensions in inches, allow 10% waste by default, and optionally enter tiles per box. Grout gap is a note only and never changes the tile count.
Tile inputs
How to estimate tiles
Multiply surface dimensions in feet, or enter a known total square footage. For a floor use length × width; for a wall use height × width. Add your waste allowance: area with waste = net area × (1 + waste% / 100). The default is 10%.
Tile dimensions are in inches. Divide each side by 12 to convert to feet, then multiply to get one tile's square-foot area. Divide the area with waste by the tile area and round up to a whole tile. If you enter tiles per box, divide the rounded tile count by tiles per box and round up again. Grout gap is a note only and does not change tile counts.
Worked examples
8 × 6 ft wall, 6 × 6 in tiles, 20 tiles per box
8 × 6 ft = 48 sq ft. With 10% waste, allow 52.8 sq ft. A 6 × 6 in tile covers 0.25 sq ft. Round up 52.8 ÷ 0.25 = 211.2 to 212 tiles. At 20 tiles per box, round up 212 ÷ 20 = 10.6 to 11 boxes.
Formula
netArea = length × width (or totalArea); areaWithWaste = netArea × (1 + wastePercent / 100); tileAreaSqFt = (tileLengthIn / 12) × (tileWidthIn / 12); tilesNeeded = ceil(areaWithWaste / tileAreaSqFt); boxesNeeded = ceil(tilesNeeded / tilesPerBox)
- length, width
- Surface dimensions in feet; length is height for a wall
- tileLengthIn, tileWidthIn
- Tile dimensions in inches; divide each by 12 to get feet
- wastePercent
- Waste allowance, default 10%
- tilesPerBox
- Optional positive whole number from the carton label
- ceil
- Round up to the next whole tile or box
- groutGapIn
- Optional layout note only; never used in tile-count arithmetic
Materials estimate disclaimer
This tile calculator is an approximate materials estimate only, not a price or a purchase quote. Actual requirements depend on layout, cuts, patterns, breakage and product dimensions. Confirm tile size and tiles per box on the label, and check your plan with an installer before purchasing. Grout gap is a note only and does not change the calculated tile count.
Frequently asked questions
How do I calculate floor or wall tiles?
Multiply surface dimensions in feet, or enter the total square footage. Add a waste allowance, divide by the area of one tile, and round up. For a wall use height × width; for a floor use length × width.
How are tile inches converted to square feet?
Divide each tile side by 12, then multiply. A 12 × 12 in tile is 1 sq ft. A 6 × 6 in tile is 0.5 × 0.5 = 0.25 sq ft.
Why is the default waste allowance 10%?
10% provides a planning allowance for cuts, breakage and spare tiles. Adjust it for your layout or installer recommendations. Patterns, diagonal layouts and obstacles may need more.
Does grout gap change the tile count?
No. Grout gap is an optional layout note only and MUST NOT change the tile count. The calculator uses tile dimensions alone; confirm the final layout and spacing with your installer.
How are tiles and boxes rounded?
Always round up to whole tiles first. If tiles per box is entered, divide that whole-tile count by tiles per box and round up again. 212 tiles at 20 per box require 11 boxes.
Is this a tile price or purchase quote?
No. This is an approximate materials estimate, not a price or purchase quote. It excludes labor, tax, adhesive, grout, trim and delivery. Confirm tile dimensions and carton quantities on the product label.