80 sq ft · 12×12 · 10%
Input
8×10 bathOutput
88 tiles · 9 boxes88 sq ft ÷ 1 sq ft/tile = 88 tiles.
Tile quantity is **floor area × (1 + waste%) ÷ tile area**, rounded up to whole tiles and cartons.
**Formula:**
Tile area (sq ft) = (width in × height in) ÷ 144
Tiles = ceil(net sq ft × (1 + waste%) ÷ tile area)
Boxes = ceil(tiles ÷ tiles per box)
**Example — 80 sq ft bath, 12×12 in tiles, 10% waste, 10 tiles/box:**
80 × 1.10 = 88 sq ft → **88 tiles** → **9 boxes**
**Example — 120 sq ft kitchen, 12×24 in subway, 10% waste:**
132 sq ft ÷ 2 sq ft/tile = **66 tiles**
Net floor area times waste buffer, divided by per-tile sq ft, rounded up to boxes.
Formula
tiles = ceil(net_sq_ft × (1 + waste%) / tile_sq_ft); boxes = ceil(tiles / tiles_per_box)Tap 8×10 bath, 10×12 kitchen, or enter floor sq ft on the main form.
Subway 12×24, mosaic 12×12, or large 24×24 presets set dimensions and waste.
Read from the tile carton — often 5–15 tiles per box depending on size.
Results show tiles to order, sq ft with waste, box round-up, and purchase guide.
Use Paint Calculator for walls or Flooring Calculator for dry-room plank floors.
Input
8×10 bathOutput
88 tiles · 9 boxes88 sq ft ÷ 1 sq ft/tile = 88 tiles.
Input
12×12 roomOutput
159 tiles · 16 boxes158.4 sq ft with waste → 159 tiles.
Input
Kitchen plank tileOutput
66 tiles132 sq ft ÷ 2 sq ft/tile = 66 tiles.
Input
Entry foyerOutput
44 tiles · 5 boxesSmall floor — still round up boxes.
Common real-world scenarios where this tool saves time.
80 sq ft + 10% waste, 12×12 tiles = 88 tiles, 9 boxes at 10/box.
120 sq ft + 10% waste, 12×24 planks = 66 tiles.
Small wet area — 15% waste for cuts around drain.
Step-by-step chains that connect related tools for common tasks.
| Layout | Waste % |
|---|---|
| Straight grid | 10% |
| Diagonal | 15% |
| Herringbone / complex | 15–20% |
| Factor | Ceramic/porcelain tile | LVP plank |
|---|---|---|
| Wet areas | Ideal — bath & kitchen | Dry rooms only |
| Install skill | Moderate–high | Moderate |
| Unit math | Tiles + boxes | Sq ft cartons |
Floor tile uses **floor** sq ft inside walls — not perimeter × height.
End cuts and breakage always waste tiles — **10% minimum**.
Buy all boxes at once — shade and caliber vary between runs.
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100 sq ft floor. With 12×12 in tiles (1 sq ft each) and 10% waste: 110 tiles. Round up boxes using tiles per box on the label.
10% for straight grid layouts, 15% for diagonal, 15–20% for herringbone or many cuts.
Tile sq ft = (width in × height in) ÷ 144. A 12×24 in tile covers 2 sq ft.
Divide total tile count (with waste) by tiles per box on the carton and round up.
12×12 = 1 sq ft per tile. 24×24 = 4 sq ft per tile — fewer pieces but harder cuts at edges.
Use Tile Calculator for ceramic/porcelain floors. Use Flooring Calculator for click-lock LVP and laminate.
Showers need 10–15% waste for drain cuts and curb angles — use the shower preset or raise waste buffer.
Switch to metric — enter floor m². Tile dimensions stay in inches (US nominal sizes) or convert to cm on the label.
Partial boxes are not sold — always order whole cartons and keep spares.
Grout joints slightly reduce tile count — the 10% waste buffer covers joint spacing and cuts.
Tile dimensions and floor measurements stay on your device — no upload to EverydayTools servers.
Estimates only — verify with manufacturer install guide for your specific tile and substrate.
Part of Calculator Tools
More free tools for the same workflow.
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Reviewed on 2026-06-27.
10% waste — grid layout
Read from tile box — nominal size
From manufacturer carton label
| Package size | To buy |
|---|---|
| 12 × 12 in | 1.0 sq ft / tile · Floor & wall mosaic |
| 12 × 24 in | 2.0 sq ft / tile · Subway & plank floor |
| 18 × 18 in | 2.25 sq ft / tile · Large format floor |
| 24 × 24 in | 4.0 sq ft / tile · Modern open floor |