Free · No sign-up · Updated 2026
Tile Calculator & Estimator
How many tiles do you need? Multiply the room's length by its width, add 10% waste for a straight layout, then divide by the area of one tile. A 10 × 12 ft kitchen is 120 sq ft; with 10% waste that is 132 sq ft, and a 12 × 24 in tile covers 2 sq ft, so you need 66 tiles — 9 boxes at 8 per box. Enter your room below for tiles, boxes, grout, thinset and cost.
Last updated October 4, 2026
Room and tile
Tiles to buy
66 tiles
- Room area
- 120 sq ft
- Area + 10% waste
- 132 sq ft
- Boxes
- 9 boxes
- Tile cost
- $576
- Sanded grout (1/8 in joint)
- 6.4 lb · 1 × 25 lb bag
- Thinset (50 lb bags)
- 3 bags
Tile cost is for the full boxes you buy. Keep one spare box from the same lot.
Save this calculation in the free app
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Worked examples: tiles for common rooms
Each row is one run of the calculator above. Grout assumes sanded grout, a 1/8 in joint and 3/8 in thick tile.
| Job | Room | Tile | Layout (waste) | Buy (sq ft) | Tiles | Grout |
|---|---|---|---|---|---|---|
| Small bathroom floor | 5 x 8 ft = 40 sq ft | 12 x 12 in | Straight (10%) | 44 | 44 | 2.8 lb |
| Bathroom floor, large tile | 5 x 8 ft = 40 sq ft | 12 x 24 in | Brick offset (12%) | 45 | 23 | 2.1 lb |
| Kitchen floor | 10 x 12 ft = 120 sq ft | 12 x 24 in | Straight (10%) | 132 | 66 | 6.4 lb |
| Kitchen floor, diagonal | 10 x 12 ft = 120 sq ft | 18 x 18 in | Diagonal (15%) | 138 | 62 | 5.7 lb |
| Living room | 12 x 15 ft = 180 sq ft | 24 x 24 in | Straight (10%) | 198 | 50 | 6.4 lb |
| Hallway, wood-look plank | 4 x 20 ft = 80 sq ft | 6 x 36 in | Herringbone (20%) | 96 | 64 | 6.5 lb |
| Kitchen backsplash | 1.5 x 20 ft = 30 sq ft | 3 x 6 in | Brick offset (12%) | 34 | 269 | 6.1 lb |
Round tiles up to whole boxes. Box counts differ by product — check the label.
How to measure a room for tile
- Measure wall to wall at the floor, in feet, along the longest length and the widest width. Round up to the next half foot.
- Split L-shaped rooms into rectangles, work out each one, and add them. The tile area calculator does this for you.
- Leave in closets and the space under the vanity if the tile runs under it; subtract only fixed cabinets and an island.
- For walls, measure each wall's height to the tile line and subtract windows and doors — see the wall tile calculator.
- Pick the waste for your layout: 10% straight, 12% brick offset, 15% diagonal, 20% herringbone.
What tile costs per square foot
Material prices by tile type from RUBI, 2026 Tile Floor Installation Cost (updated Apr 16, 2026). Labor adds $5–$22 per sq ft; subfloor prep $2–$5 and demolition $3–$7 if needed.
| Tile type | Material per sq ft | 132 sq ft kitchen (120 + 10%) |
|---|---|---|
| Ceramic | $1–$8 | $132–$1,056 |
| Porcelain | $4–$14 | $528–$1,848 |
| Wood-look porcelain | $5–$15 | $660–$1,980 |
| Natural stone | $7–$25 | $924–$3,300 |
| Glass | $12–$35 | $1,584–$4,620 |
Tile calculator FAQ
How do I calculate how many tiles I need?
Multiply the room's length by its width to get square feet, add your waste allowance (10% for a straight layout), then divide by the area of one tile. A 10 x 12 ft kitchen is 120 sq ft; with 10% waste that is 132 sq ft, and a 12 x 24 in tile covers 2 sq ft, so you need 66 tiles.
How many boxes of tile do I need?
Divide the tiles you need by the number of tiles in one box and round up. Box counts vary by product, so read the label: 66 tiles of 12 x 24 at 8 per box is 9 boxes. Buy one extra box from the same lot for future repairs.
How much extra tile should I buy for a floor?
Add 10% for a straight grid, about 12% for a brick offset, 15% for diagonal and 20% for herringbone. Rooms with many corners, closets or a toilet flange to cut around need a few percent more.
How many 12x12 tiles do I need?
One 12 x 12 in tile covers exactly 1 sq ft, so you need one tile per square foot plus waste. A 5 x 8 ft bathroom (40 sq ft) needs 44 tiles at 10% waste.
How much grout do I need per square foot?
It depends on tile size and joint width, because smaller tiles mean more joint. For 12 x 12 in tile, 3/8 in thick, with a 1/8 in joint, sanded grout works out to about 0.07 lb per sq ft — roughly 2.8 lb for a 40 sq ft bathroom floor. The grout calculator works it out for any tile.
How much does tile installation cost per square foot?
RUBI's 2026 cost guide puts tile material at $1–$8 per sq ft for ceramic, $4–$14 for porcelain and $7–$25 for natural stone, with labor at $5–$22 per sq ft depending on tile size, pattern and region.
Should I measure in square feet or count tiles?
Measure square feet — tile is sold by the box and priced per square foot. Use the tile count to check the store's math and to plan how many full tiles fit across the room.
Tile tools worth owning
The three things that separate a tidy tile job from a wavy one.
Tile Wet Saw
SHDIATOOL Diamond Turbo Blade 10 - Inch Super Thin Cutting Disc for Porcelain Ceramic Tile Granite Dia 250mm
$39.99
Check price on AmazonClean, chip-free cuts in porcelain and stone — the one tool that makes DIY tile look pro.
Tile Leveling System
DGSL Tile Leveling System with Plier, 600 Tile Spacers 1/8" and 200 Wedges
$35.09
Check price on AmazonKills lippage on large-format tile so every edge sits flat.
Beginner Tile Tool Kit
Trowel, float, spacers, sponge and bucket in one box — everything a first tile job needs.
As an Amazon Associate I earn from qualifying purchases.
Prices as of Oct 10, 2026, 6:33 AM UTC. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
The app
Take every calculator with you — free on Google Play
The Smart Tile Calculator app puts the whole site in your pocket. Run the numbers in the aisle at the tile store or on the job site — even with no signal.
- ✓39 calculators — tile, grout, thinset, weight, layout cuts and more
- ✓Works offline: measure in the store, in the basement, anywhere
- ✓Remembers your last numbers — pick up where you left off
- ✓Free — no account needed
Tile calculators
Every calculator runs instantly in your browser — nothing is stored, nothing to install.
Area & quantity
- Tile Quantity CalculatorHow many tiles you need for any room, wall, or floor — with waste.Open →
- Tile Area CalculatorSquare footage for multiple rooms and shapes, minus openings.Open →
- Waste Factor CalculatorHow much extra tile to buy for cuts, patterns, and breakage.Open →
- Tile Layout & Pattern CalculatorCut sizes and row counts for grid, offset, diagonal, herringbone.Open →
- Floor Tile CalculatorTiles and boxes for any floor, by room dimensions and tile size.Open →
- Wall Tile CalculatorWall coverage minus doors, windows, and other openings.Open →
- Peel and Stick Tile CalculatorPieces and packs of self-adhesive tile for backsplashes and floors.Open →
- Mosaic Sheet CalculatorMesh-mounted mosaic sheets needed for floors, walls, and accents.Open →
- Herringbone Tile CalculatorPlank tile counts with the extra waste herringbone demands.Open →
- Large Format Tile Calculator24-inch-plus tiles: counts, leveling clips, and handling extras.Open →
- Tile Box ConverterConvert between tiles, boxes, and square feet both ways.Open →
By room
By tile size
- 12x12 Tile CalculatorTiles and boxes for 12-inch square tile, waste included.Open →
- 12x24 Tile CalculatorThe most popular plank size — counts, boxes and offset rules.Open →
- 24x24 & All-Size CalculatorEvery tracked tile size from 2x2 to 24x48 in one dropdown.Open →
- Subway Tile Calculator3x6 subway tile counts by pattern for walls and backsplashes.Open →
- Tiles Per Square Foot ChartReverse calculator and master chart: tiles per sq ft and per box.Open →
- 2x2 Tile CalculatorTiles and boxes for 2x2 tile, waste included.Open →
- 4x4 Tile CalculatorTiles and boxes for 4x4 tile, waste included.Open →
- 6x6 Tile CalculatorTiles and boxes for 6x6 tile, waste included.Open →
- 8x8 Tile CalculatorTiles and boxes for 8x8 tile, waste included.Open →
- 16x16 Tile CalculatorTiles and boxes for 16x16 tile, waste included.Open →
- 18x18 Tile CalculatorTiles and boxes for 18x18 tile, waste included.Open →
- 20x20 Tile CalculatorTiles and boxes for 20x20 tile, waste included.Open →
- 3x12 Tile CalculatorTiles and boxes for 3x12 tile, waste included.Open →
- 4x12 Tile CalculatorTiles and boxes for 4x12 tile, waste included.Open →
- 6x24 Tile CalculatorTiles and boxes for 6x24 tile, waste included.Open →
- 6x36 Tile CalculatorTiles and boxes for 6x36 tile, waste included.Open →
- 12x36 Tile CalculatorTiles and boxes for 12x36 tile, waste included.Open →
- 8x48 Tile CalculatorTiles and boxes for 8x48 tile, waste included.Open →
- 24x48 Tile CalculatorTiles and boxes for 24x48 tile, waste included.Open →
Patterns & layout
- Tile Pattern CalculatorHerringbone, chevron, hex, offset and diagonal waste factors.Open →
- Diagonal Tile Calculator45° layouts need about 15% extra tile — tiles for your room.Open →
- Hexagon Tile CalculatorSheets or tiles for hex layouts, with the edge cuts explained.Open →
- Chevron Tile CalculatorTile and waste for a chevron layout versus a straight grid.Open →
- Basketweave Tile CalculatorTile and waste for a basketweave layout versus a straight grid.Open →
- Versailles Tile CalculatorTile and waste for the French (Versailles) pattern.Open →
- Penny Round Tile CalculatorTile and waste for a penny round mosaic layout.Open →
- Tile Spacer Size GuidePick the right grout joint width for your tile and look.Open →
- Tile Waste Factor GuideHow much extra tile to order, by pattern and room complexity.Open →
Grout & mortar
- Grout CalculatorPounds of grout by tile size, joint width, and thickness.Open →
- Thinset & Mortar CalculatorBags of thinset by trowel notch size and coverage.Open →
- Spacer & Trim CalculatorHow many spacers and how much edge trim your layout needs.Open →
- Tile Sealer CalculatorBottles of sealer for tile and grout by area and coats.Open →
- Tile Trowel Size CalculatorWhich notch for your tile size, mortar coverage to check for, and bags of thinset.Open →
- Epoxy Grout CalculatorPounds and kits of epoxy grout by tile size, joint width and thickness.Open →
- Grout Coverage ChartSquare feet per bag of grout by tile size and joint width.Open →
Rooms & surfaces
- Backsplash Tile CalculatorKitchen backsplash square footage between counter and cabinets.Open →
- Shower Tile CalculatorWalls, floor, curb, and niche for a full shower surround.Open →
- Patio & Outdoor Tile CalculatorOutdoor-rated tile, mortar, and drainage gaps for patios.Open →
- Shower Niche Size CalculatorFinished and rough niche size that fits a stud bay and lines up with your tile.Open →
- Tile Edge Trim CalculatorSticks of Schluter or 8 ft edge trim for every exposed edge, plus profile height.Open →
- Tub Surround Tile CalculatorThree-wall tub surround: tiles, cement board, thinset, grout and installed cost.Open →
- Fireplace Tile CalculatorSurround legs, header and hearth in sq ft, edge trim and installation cost.Open →
- Stair Tile CalculatorTiles for treads and risers counted step by step, nosing, and an IRC riser check.Open →
- Tile Baseboard CalculatorLinear feet of tile base, pieces to buy, or floor tiles to cut into strips.Open →
- Bullnose Tile CalculatorBullnose pieces for backsplash, shower and wainscot edges, plus corner pieces.Open →
Specialty surfaces
- Ceiling Tile CalculatorDrop-ceiling tiles, main tees, cross tees and wall angle.Open →
- Pool & Patio Tile CalculatorWaterline bands, pool decks, patios and garage floor tile.Open →
- Epoxy CalculatorGallons of epoxy resin for a pour or a floor coat, split by mix ratio.Open →
- Carpet Tile Calculator24x24, 18x18 and 39x39 carpet squares plus boxes.Open →
- Carpet CalculatorSquare yards of 12 ft roll carpet, seams, waste, pad and tack strip.Open →
- Vinyl Tile & LVP CalculatorLVT, vinyl plank and peel-and-stick boxes by coverage.Open →
- Roof Tile CalculatorConcrete, clay or slate roof tiles by footprint and pitch.Open →
Prep & underlayment
- Deck Mud CalculatorSloped shower pan mortar bed: cubic feet and bags for centre or linear drains.Open →
- Shower Pan Size CalculatorCheck a shower base or tiled pan against the IRC minimum size, with the slope rise to the walls.Open →
- RedGard CalculatorGallons and pails of RedGard for shower walls and pan at the data-sheet coverage rates.Open →
- DITRA CalculatorDITRA rolls, thin-set bags under and over the membrane, and the trowel for each.Open →
- Floor Deflection CalculatorJoist deflection and pass/fail at L/360 for porcelain or L/720 for natural stone.Open →
- Backer Board CalculatorCement board sheets, screws, and tape for floors and walls.Open →
- Self Leveler Calculator50 lb bags of self-leveling compound by area and depth.Open →
- Tile Lippage & Warpage CalculatorANSI lippage and warpage limits, minimum joint and maximum offset.Open →
- Radiant Floor Heat CalculatorHeated mat square footage, wattage, and running cost.Open →
- Tile Leveling Clip CalculatorClips and reusable caps or wedges by tile size, spacing and layout.Open →
- Tile Weight CalculatorTotal tile weight for delivery, upstairs floors, and structure.Open →
Cost & labor
- Backsplash Installation Cost CalculatorInstalled backsplash cost by tile and pattern, with tear-out and outlets.Open →
- Shower Tile Cost CalculatorCost to tile a shower: tile, backer, waterproofing, pan, niches and labor.Open →
- Regrout Cost CalculatorRegrouting priced by joint length — pro vs DIY, cement or epoxy.Open →
- Tile Removal Cost CalculatorDIY vs pro demo cost, hours, and disposal for old tile.Open →
- Tile Labor Cost CalculatorInstaller hours and labor rates by room size and complexity.Open →
- Tile Cost EstimatorTotal project cost: tile, grout, mortar, trim, and labor.Open →
- Project Total EstimatorEvery material plus labor in one whole-project budget.Open →
- Cost to Tile a Bathroom2026 bathroom floor, shower and full-room tiling costs.Open →
Guides & charts
- How to Measure for TileStep-by-step measuring with a built-in square-footage tool.Open →
- How to Measure a ShowerWalls, pan, curb and niche — measured the right way.Open →
- Standard Tile Sizes ChartEvery standard floor, wall and subway size with sq ft per tile and tiles per 100 sq ft.Open →
- Best Tile Calculator ComparisonHow our tools compare to Home Depot, Lowe's and Menards.Open →
How much does tile installation cost in 2026?
Nationally, tile installation runs about $10–$25 per square foot installed — roughly $2–$8 for the tile itself, $1.50–$3 for setting materials, and $6–$14 per square foot in labor. Small bathrooms, mosaic sheets, and herringbone layouts push labor toward the top of that range.
See the full 2026 tile cost breakdown →Shopping for someone? See our gift ideas for the DIY dad.
Tile guides & charts
Short, practical walkthroughs for the parts of a tile job the calculators assume you already know.
- How to Measure for TileRectangles, L-shapes, walls and openings — measured properly the first time.Read the guide →
- How to Measure a ShowerThree walls, the pan, the curb and the niche, with a worked example.Read the guide →
- Tiles Per Square FootMaster chart for every size from 2x2 to 24x48, plus box counts.Read the guide →
- Tile Waste FactorHow much extra tile to order by pattern and room complexity.Read the guide →
- Tile Spacer Size GuideWhich grout joint to use, and sanded vs unsanded grout.Read the guide →
- Cost to Tile a Bathroom2026 prices for floors, showers and full bathroom tiling.Read the guide →
Tiles per square foot — quick reference
How many tiles cover one square foot, and how many you need for 100 square feet before waste.
| Tile size | Coverage each | Tiles per sq ft | Per 100 sq ft |
|---|---|---|---|
| 3 x 6 in subway | 0.125 sq ft | 8 | 800 |
| 4 x 4 in | 0.111 sq ft | 9 | 900 |
| 6 x 6 in | 0.25 sq ft | 4 | 400 |
| 12 x 12 in | 1.00 sq ft | 1 | 100 |
| 12 x 24 in | 2.00 sq ft | 0.5 | 50 |
| 18 x 18 in | 2.25 sq ft | 0.44 | 45 |
| 24 x 24 in | 4.00 sq ft | 0.25 | 25 |
Add 10% waste for straight layouts, 15% diagonal and 20% herringbone.
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· Reviewed by the Smart Tile Calculator editorial team