How many tiles come in a box?

Boxes vary by product — often 5 to 15 square feet per box. Enter tiles per box from your carton label for an accurate box count.

How much grout do I need?

Grout depends on joint width, tile size, and depth. A typical 25 lb bag covers roughly 50 to 80 square feet at 1/8 inch joints for standard formats.

Tile Calculator & Estimator | Floor & Wall Tiles

Q: How many tiles do I need?

Multiply room length by width for area, divide by each tile face area, then add 10 to 15 percent waste for cuts. This tile calculator uses a grid layout with grout spacing for a closer count.

Q: How much extra tile should I buy?

Use 10 percent waste for straight floor layouts and 15 percent for walls, diagonals, or patterned tile. Complex bathrooms may need more.

Q: What tile size is best?

12 by 12 inch and 24 by 24 inch tiles are common on floors; 6 by 24 inch subway and 12 by 24 inch formats are popular on walls. Match size to room scale and layout.

Q: How do I calculate tile coverage?

Coverage equals room area in square feet. Tiles needed equals area divided by tile area, adjusted for grout joints and waste percentage.

Practical Tile Examples

Tap to load into this floor tile calculator or wall tile calculator.

Bathroom Floor

5 ft × 8 ft · 12×12 in · 12% waste.

Tiles: ~45 tiles

Kitchen Wall

10 ft × 2.5 ft backsplash · 6×24 subway.

Tiles: ~32 tiles

Shower Wall

3 ft × 8 ft · 12×24 in · 15% waste.

Tiles: ~14 tiles

Living Room Flooring

15 ft × 20 ft · 24×24 in · 10% waste.

Tiles: ~88 tiles

How to Calculate Tile Coverage

Tiles = Room Area ÷ Tile Area Add grout spacing to each tile pitch · then add waste%

Measure room length and width (inside finished surfaces).
Note tile length and width (face size, not sheet size).
Add grout spacing to each dimension for layout pitch.
Count tiles on a grid or divide area by tile area — use the higher result.
Add waste (10% floors, 15% walls) and round up boxes.

This tile coverage calculator supports feet, inches, meters, and common preset sizes. For area in square yards, use our square feet to square yards calculator.

Tile Calculator FAQ

How many tiles do I need?

Divide your room’s square footage by each tile’s square footage, then add waste for cuts. This tool also counts a row-and-column grid with grout spacing for a closer order quantity.

How much extra tile should I buy?

Order 10% extra for straight floor layouts and 15% extra for walls, niches, or diagonal patterns. Keep a few spare tiles for future repairs.

What tile size is best?

Large rooms often look best with 12×24 or 24×24 floor tile; small baths work well with 12×12 or mosaics. Walls commonly use subway (6×24) or 4×12 formats.

How do I calculate tile coverage?

Coverage area = length × width. Each tile covers its face area; joints reduce the count slightly — enter grout spacing above for layout pitch.

Is this the same as a tile estimator?

Yes — this page is the canonical tile calculator. The tile estimator URL redirects here to avoid duplicate tools.

Tile Calculator

Room & Tile Layout

Bathroom Floor

Kitchen Wall

Shower Wall

Living Room Flooring

How to Calculate Tile Coverage

Tile Calculator FAQ

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