Tile Estimator — Estimate Tile Quantity and Cost Before You Buy
A tile estimate answers two questions before you walk into a tile store: how many tiles do you need, and what will they cost? Get either number wrong and you're making a second trip — or worse, ordering a tile that's been discontinued. This page gives you a framework for estimating both quantity and cost accurately, then hands off to a calculator that outputs an exact count for your specific room and pattern.
To estimate tile quantity: measure the surface area (length × width for floors, width × height per wall), divide by the area of one tile, and add 10–15% waste. To estimate cost: multiply the total square footage by the price per square foot of your tile, then add 10–15% for the waste allowance.
1How to estimate tile quantity
A tile quantity estimate has three inputs: surface area, tile size, and waste factor. Get all three right and your shopping list is accurate; miss one and you're making a second trip.
For floors: length × width in feet. For walls: width × height per wall (measure each wall separately). For a backsplash strip: length × height (typically 18 inches, or 1.5 feet). Subtract openings larger than 10 sq ft — standard windows, doors. Leave outlets, small windows, and valves in the calculation.
Divide each tile dimension by 12 to convert from inches to feet, then multiply: a 3×6 inch tile = 0.25 × 0.5 = 0.125 sq ft per tile. A 12×24 inch tile = 1 × 2 = 2 sq ft per tile. Divide your surface area by this number to get the raw tile count.
Multiply raw tile count by 1 plus your waste factor (e.g. 1.12 for 12% waste). Then divide by tiles per box and round up to get the box count. Most tile is sold in boxes of 10–20 tiles — check the box coverage before you order.
Surface area: 180 sq ft. Tile area: 1 sq ft each. Raw count: 180 tiles. With 10% waste: 198 tiles. At 15 tiles per box: 13.2 boxes → order 14 boxes (210 tiles).
2How to estimate tile cost
Tile cost estimates have two components: the tile material cost and the waste allowance. Most estimators miss one or both.
Multiply total surface area (sq ft) by the tile price per square foot, then multiply by 1 plus your waste factor. Example: 180 sq ft at $4/sq ft with 10% waste = 180 × $4 × 1.10 = $792 in tile cost. If the tile is priced per piece, multiply by tile count including waste instead.
Tile is sold in boxes, not by the square foot. The box label shows coverage per box (e.g. '10 sq ft per box, 10 tiles'). If you need 198 sq ft, divide by box coverage to get the box count, then multiply boxes × box price to get total cost. Comparing price per sq ft across boxes is easier than comparing per-tile prices.
Tile is heavy — a pallet of 200 sq ft of 12×12 ceramic tile weighs roughly 800 lbs. Delivery fees for large orders run $50–$150 at home improvement stores; specialist tile shops often waive fees on orders over a threshold. Factor delivery into your cost estimate before comparing online vs in-store prices.
3Waste factors — the one number most estimates get wrong
Most DIY estimates use a flat 10% waste regardless of pattern, room shape, or tile size. Here's the real waste table:
| Pattern / situation | Waste factor | Why |
|---|---|---|
| Straight grid (floor or wall) | 8–12% | Mostly perimeter cuts; full-tile field minimizes waste |
| Subway / running bond (½ offset) | 10–15% | Every other row ends in a half-cut |
| 1/3 offset (plank tile) | 10–15% | Manufacturer-required for 12×24+ tile; similar to subway waste |
| Diagonal / 45° | 15–20% | Every perimeter tile is a triangle cut |
| Herringbone / chevron | 15–25% | V-shaped perimeter; more cuts per linear foot of edge |
| Irregular room (L-shape, U-shape) | +5% above pattern baseline | Inside corners produce awkward cuts grid math doesn't predict |
| Natural stone / handmade tile | +5% above pattern baseline | Higher chip rate; shade variation requires rejecting some pieces |
| Small tile (under 2 × 4 inches) | +5% above pattern baseline | Higher perimeter-to-tile-area ratio — more cuts per sq ft |
Whatever your calculated waste factor says, add at least one full box above it for attic stock. Tile dye lots change constantly — a box ordered 18 months later from the same SKU often won't match. Keep a sealed box in storage for future repairs.
4Material cost by tile type
Tile price per square foot varies enormously by material, finish, and source. Use this table for budget-range estimates before you've selected a specific tile:
| Tile type | Price range (per sq ft) | Notes |
|---|---|---|
| Ceramic (glazed) | $2–$5 | Most affordable; suitable for walls and light-traffic floors |
| Porcelain (standard) | $4–$10 | Denser than ceramic; good for floors and walls |
| Large-format porcelain (24×24+) | $6–$15 | Premium for size; higher substrate cost offset by fewer grout lines |
| Glass tile | $7–$20 | Reflective backsplash and accent tile; chips at cuts |
| Natural stone (travertine, limestone) | $8–$20 | Requires sealing; shade variation means higher waste |
| Marble | $15–$40+ | High-end; very prone to staining and chipping — order 20% extra |
| Cement / encaustic tile | $10–$25 | Decorative; sealing required; not for wet areas unsealed |
Material cost is only part of the project. A standard install adds $1–$3 per sq ft for thinset, grout, and grout sealer. Large-format tile requires larger-notch trowels and often polymer-modified thinset — add $0.50–$1 per sq ft to the material estimate for the adhesive system.
5Beyond tile — thinset, grout, and installation cost
A complete project estimate includes materials beyond the tile itself. These are the items most budgets forget:
| Item | Typical cost | Notes |
|---|---|---|
| Thinset mortar (50 lb bag) | $20–$40 | Covers 50–100 sq ft (¼-in trowel) or 30–50 sq ft (½-in trowel) |
| Grout (unsanded, 25 lb) | $15–$25 | For grout joints under 1/8 inch (wall tile, mosaic) |
| Grout (sanded, 25 lb) | $15–$25 | For grout joints 1/8 inch and wider (most floor tile) |
| Grout sealer | $10–$25 | Apply 48–72 hours after grouting; renew every 1–3 years |
| Waterproofing membrane (shower / tub) | $1.50–$3 per sq ft | Non-negotiable for wet areas |
| Tile installation labor | $5–$15 per sq ft | Standard pattern; complex patterns add $5–$10 per sq ft |
For a standard floor tile job: add $7–$12 per sq ft to the tile material cost (thinset + grout + labor) for a total installed estimate. For a shower: add $15–$25 per sq ft on top of materials (waterproofing + labor premium for cut complexity). These are approximations — get contractor quotes for accurate labor costs in your area.
6Quick tile estimates by room type
Use these starting points before you measure precisely. All tile costs assume mid-range porcelain at $6/sq ft; waste factors assume a subway or straight-grid pattern.
| Room / project | Approx. area | With waste | Tile material cost |
|---|---|---|---|
| Kitchen backsplash (10-ft run) | 15 sq ft | 17 sq ft | $100–$170 |
| Powder room floor (5×5 ft) | 25 sq ft | 28 sq ft | $170–$280 |
| Bathroom floor (5×8 ft) | 40 sq ft | 44 sq ft | $265–$440 |
| Shower walls (3×3 ft, to ceiling) | 72 sq ft | 83 sq ft | $500–$830 |
| Tub surround (5×3 ft, 6-ft height) | 66 sq ft | 74 sq ft | $445–$740 |
| Full bathroom (floor + shower + backsplash) | ~130 sq ft | ~150 sq ft | $900–$1,500 |
| Kitchen floor (12×16 ft) | 192 sq ft | 211 sq ft | $1,270–$2,110 |
These estimates use mid-range porcelain at $6/sq ft. Your actual tile price and tile size will change the count and cost. Use the tile estimator calculator to enter your specific tile dimensions and price per square foot for an exact shopping list.
Pro Tips
- ✓Get the box coverage rate, not just the price per tile. Tile stores list price per tile or per box — neither is useful until you convert to price per sq ft. Ask for coverage per box and divide box price by coverage. A box of 5 tiles at $45 that covers 10 sq ft costs $4.50/sq ft; a box of 20 tiles at $60 that covers 15 sq ft costs $4/sq ft.
- ✓Estimate from the room, then verify with a cut diagram. A square-footage estimate tells you how many boxes to buy. It doesn't tell you whether the layout leaves slivers at the perimeter or whether a 12×24 tile will need to be cut in half to center in your room. Run the tile calculator to see a cut diagram before you order — it catches layout problems that a box count can't.
- ✓Order all tile from the same dye lot. When you pick up tile from multiple store locations or reorder weeks later, you risk getting a different dye lot. Color variation is most visible in natural stone and hand-finished tile but affects even standard porcelain. Check all boxes before opening — the lot number is on the label.
- ✓Estimate grout separately by joint width. Grout quantity depends on joint width, tile size, and depth — not just square footage. A 1/16-inch joint with 3×6 subway tile uses half the grout of a 1/4-inch joint with the same tile. Grout bag coverage charts are printed on the bag; verify your specific joint and tile size before buying.
- ✓Build your estimate before visiting the store. Walking into a tile store without a square-footage estimate puts you at the mercy of in-store math. Build your estimate at home, write down the surface areas and waste factors, and bring it with you. Most stores have staff who can verify your count — but you'll make better decisions when the numbers are already in your hand.
Build your tile estimate in seconds
Enter room dimensions, tile size, and pattern choice to get an exact tile count, waste-adjusted box quantity, and a visual cut diagram. Works for floors, walls, and complex room shapes.
Written by the TilePro Editorial Team
Tile-installation researchers and calculator engineers — every guide is grounded in real waste-per-pattern data from the calculator.