Flooring & Tile
Tile Calculator
Estimate tiles needed for a floor or wall area, with tile size, waste factor, a layout pattern preview, and an optional user-entered tile cost.
Calculator inputs
Tile Calculator Results
Results update in your browser as you edit inputs. They are planning estimates, not complete shopping lists.
Enter project dimensions to calculate material quantity.
Tile layout preview
A scaled view of your room and tile size. Whole tiles are green; red tiles are edge pieces you would cut. Switch layouts to see how the pattern changes the number of cuts.
Assumptions
- Tile size uses the visible face size, not box coverage.
- If your tile is sold by the box, use the tiles-per-box field or divide the tile count by the box coverage and round up.
- Grout width, trim pieces, patterns, and border cuts are not modeled separately.
- The calculator rounds up to whole tiles.
- Cost outputs use only the unit prices you enter.
Formula
- Project area = known area, or room length x room width.
- Tile area = tile width x tile height converted to square feet.
- Tiles needed = ceil(project area / tile area).
- Tiles including waste = ceil(tiles needed x (1 + waste factor)).
- Boxes needed = ceil(tiles including waste / tiles per box), if package quantity is entered.
How to Use the Tile Calculator
- Enter a known square-foot area, or leave it blank and enter room length and width.
- Enter the visible tile width and height in inches.
- Add a waste factor for cuts, breakage, layout direction, and future repairs.
- If your tile is sold by the box, enter tiles per box to estimate rounded boxes.
- Use the result as a tile-count estimate, then check box coverage and manufacturer instructions.
Tile Calculator Examples
100 sq ft floor with 12 in x 12 in tile
A 100 sq ft floor using 12 in by 12 in tile needs 100 tiles before waste and 110 tiles with a 10% waste factor.
- Area: 100 sq ft
- Tile coverage: 1 sq ft each
- Base count: 100 tiles
- With 10% waste: 110 tiles
80 sq ft wall with 12 in x 24 in tile
A 12 in by 24 in tile covers 2 sq ft. For an 80 sq ft wall, the base count is 40 tiles, or 44 tiles after 10% waste.
- Area: 80 sq ft
- Tile coverage: 2 sq ft each
- Base count: 40 tiles
- With 10% waste: 44 tiles
Units and Parameters Quick Reference
Tile inputs and units
The calculator converts tile dimensions from inches to square feet before dividing the project area.
| Input | Unit | Planning note |
|---|---|---|
| Known area | sq ft | Use this when a plan or room measure already gives total area. |
| Room length and width | ft | Used only when known area is blank. |
| Tile width and height | in | Use visible tile face dimensions. |
| Waste factor | % | Use more for diagonal, herringbone, border, or cut-heavy layouts. |
| Tiles per box | tiles | Used only to estimate rounded box count. |
This estimate does not include grout, thinset, trim, backer board, waterproofing, or spacers.
Planning reference
Tile waste factor by layout pattern
Pattern drives edge cuts. Use these starting points, then add more for small rooms or many obstacles.
| Layout pattern | Typical waste factor | Why |
|---|---|---|
| Straight grid | 10% | Aligned tiles, fewest cuts. |
| Brick / 50% offset | 10% | Simple stagger, low cut-off. |
| Diagonal (45°) | 15% | Angled edges add cut-off. |
| Herringbone | 15% or more | Interlocking angles create the most cuts. |
| Small tile / mosaic | 10% – 15% | More grout lines and edge pieces. |
Waste factors are planning starting points, not guarantees. Buy from the same lot and keep spares for future repairs.
Tile estimate template fields
Use the calculator result as a simple tile estimate template before you compare products or check box coverage.
Tile estimate checklist
| Field | Why it matters |
|---|---|
| Project area | The square footage being tiled, either entered directly or calculated from room dimensions. |
| Tile width | The visible tile width used to estimate individual tile coverage. |
| Tile height | The visible tile height used to estimate individual tile coverage. |
| Waste factor | A planning allowance for cuts, breakage, layout changes, and pattern complexity. |
| Tiles per box | Optional package quantity used to estimate boxes needed. |
| Tiles needed | The rounded tile count before and after waste. |
| Boxes needed | The rounded package count when tiles per box is entered. |
| Notes | Space for product coverage, layout constraints, trim, color lot, or room-specific reminders. |
| User-entered price | Optional cost line based only on the price you type in, not live store data. |
This printable quantity estimate does not include mortar, grout, trim, spacers, underlayment, or setting materials. Calculate those separately.
Example calculation
Example: 10 x 10 room
A 100 sq ft room using 12 in by 12 in tile needs 100 tiles before waste and 110 tiles with 10% waste.
Common mistakes
- Mixing inches and feet when entering tile dimensions.
- Skipping waste for diagonal layouts or rooms with many cuts.
- Using the calculator for tile setting materials such as mortar or grout.
FAQ
Should I enter floor area or room dimensions?
Either works. If known area is entered, it is used first. Otherwise the calculator uses length times width.
How many tiles do I need for a herringbone or diagonal layout?
Start from the same tile count as a straight layout, then raise the waste factor. Herringbone and 45-degree diagonal patterns produce more edge cuts, so a 15% or higher waste factor is common instead of 10%.
How does tile pattern affect waste?
Straight grid and brick (50% offset) layouts create the least cut-off, so about 10% waste is typical. Herringbone, diagonal, and small mosaic tiles create more, so plan 15% or more. Use the layout pattern preview above to picture the cuts.
Does this include grout, mortar, or spacers?
No. This calculator estimates tile quantity only. Grout, thinset or mortar, backer board, spacers, and trim should be estimated separately from product coverage.
How many tiles do I need for 100 square feet?
With 12 in by 12 in tile, 100 sq ft needs 100 tiles before waste. With 10% waste, plan about 110 tiles.
How much tile waste should I add?
A simple straight layout often starts around 10%. Use more for diagonal layouts, patterns, borders, small rooms, or many cuts.
Should I calculate by tiles or by box coverage?
Use the tile count first, then compare it with the tiles per box or square-foot coverage printed on the package and round up.
Related Planning Tools
Use these related calculators when the same project needs another material estimate. Each link opens a browser-based tool with its own assumptions and formulas.