Tile Calculator – Calculate Tile Quantity for Floor, Wall, or Ceiling

Calculate the exact number of tiles needed for your project with our advanced tile calculator. Save time and money by getting precise measurements including waste factor.

Tile Calculator

Tile Dimensions

Area to Cover

Installation Details

Pricing Information

Calculation Results

Tile Calculator Diagram

Tile Length Tile Width Gap Area Length Area Width

This diagram shows the relationship between tile dimensions, area to cover, and gap size.

How to Use the Tile Calculator

Step-by-Step Instructions

  1. Select the surface type: Floor / Wall / Ceiling
  2. Enter room dimensions (Length × Width)
  3. Enter tile size (e.g., 12×12 inches or 300×300 mm)
  4. Add grout gap (optional)
  5. Add a waste percentage (recommended: 5–10%)
  6. Click Calculate to get:
    • Total tile area
    • Number of tiles needed
    • Tiles with waste factor

Why Accurate Tile Calculation Matters

  • Avoid tile shortage and over-purchasing
  • Save money and reduce material waste
  • Ensure layout consistency and minimal cutting
  • Avoid batch color variations

Customize Your Tile Project

Surface Type

  • Floor
  • Wall (kitchen, bathroom, shower)
  • Roof (for clay/cement tiles)

Tile Layout Options

  • Straight lay
  • Diagonal / Diamond pattern
  • Herringbone / Chevron (adds extra waste)

Grout Gap Consideration

Impacts tile count slightly. Option to exclude/include spacing.

Wastage Factor

  • 5% for simple layout
  • 10–15% for complex cuts or patterns

Common Tile Sizes and Coverage Area

Tile Size Area Covered (sq ft/tile)
12x12 inch (1x1 ft) 1.0
18x18 inch 2.25
24x24 inch 4.0
300x300 mm 0.09 m²
600x600 mm 0.36 m²

Real-World Applications

  • Homeowners planning kitchen or bathroom renovation
  • Contractors estimating tile for commercial buildings
  • Architects doing layout drawings
  • DIYers tackling tile installation

Test Your Tile Calculation Knowledge

Question 1: I'm tiling a living room that's 15 ft × 12 ft using 12×12 inch tiles. How many tiles do I need including 10% waste?

Answer: 198 tiles

Room area: 15 ft × 12 ft = 180 sq ft

Each 12×12 inch tile covers 1 sq ft

Tiles needed: 180 sq ft ÷ 1 sq ft = 180 tiles

With 10% waste: 180 × 1.10 = 198 tiles

Question 2: For a kitchen floor (4m × 3.5m) with 600×600 mm tiles, how many tiles are required with a 7% waste factor?

Answer: 43 tiles

Room area: 4m × 3.5m = 14 sq m

Each 600×600 mm tile covers 0.36 sq m

Tiles needed: 14 sq m ÷ 0.36 sq m = 38.89 tiles (round up to 39)

With 7% waste: 39 × 1.07 = 41.73 tiles (round up to 43)

Question 3: I want to install 18x18 inch tiles on a 10x10 ft bedroom floor. How many tiles do I need?

Answer: 49 tiles

Room area: 10 ft × 10 ft = 100 sq ft

Each 18×18 inch tile covers 2.25 sq ft

Tiles needed: 100 sq ft ÷ 2.25 sq ft = 44.44 tiles (round up to 45)

With 10% waste: 45 × 1.10 = 49.5 tiles (round up to 50)

Question 4: I'm tiling a bathroom wall 9 ft wide and 8 ft high using 4×8 inch tiles. How many tiles will I need?

Answer: 238 tiles

Wall area: 9 ft × 8 ft = 72 sq ft

Each 4×8 inch tile covers 0.22 sq ft

Tiles needed: 72 sq ft ÷ 0.22 sq ft = 327.27 tiles (round up to 328)

With 10% waste: 328 × 1.10 = 360.8 tiles (round up to 361)

Question 5: How many subway tiles (3×6 inches) are needed for a backsplash 10 ft wide and 2 ft high?

Answer: 132 tiles

Backsplash area: 10 ft × 2 ft = 20 sq ft

Each 3×6 inch tile covers 0.125 sq ft

Tiles needed: 20 sq ft ÷ 0.125 sq ft = 160 tiles

With 10% waste: 160 × 1.10 = 176 tiles

Question 6: For a shower wall 2.5m x 2.1m, how many 300x300 mm tiles should I buy including 10% extra?

Answer: 64 tiles

Wall area: 2.5m × 2.1m = 5.25 sq m

Each 300×300 mm tile covers 0.09 sq m

Tiles needed: 5.25 sq m ÷ 0.09 sq m = 58.33 tiles (round up to 59)

With 10% waste: 59 × 1.10 = 64.9 tiles (round up to 65)

Question 7: I'm tiling a rooftop terrace of 20 ft × 18 ft with 24x24 inch tiles. What's the total tile count needed?

Answer: 99 tiles

Terrace area: 20 ft × 18 ft = 360 sq ft

Each 24×24 inch tile covers 4 sq ft

Tiles needed: 360 sq ft ÷ 4 sq ft = 90 tiles

With 10% waste: 90 × 1.10 = 99 tiles

Question 8: For a balcony (3m x 2m) using 400×400 mm ceramic tiles, how many tiles should I purchase?

Answer: 42 tiles

Balcony area: 3m × 2m = 6 sq m

Each 400×400 mm tile covers 0.16 sq m

Tiles needed: 6 sq m ÷ 0.16 sq m = 37.5 tiles (round up to 38)

With 10% waste: 38 × 1.10 = 41.8 tiles (round up to 42)

Question 9: I'm using 16×16 inch tiles in a diamond layout for a dining room (14 ft x 10 ft). How much extra should I buy?

Answer: 121 tiles

Room area: 14 ft × 10 ft = 140 sq ft

Each 16×16 inch tile covers 1.78 sq ft

Tiles needed: 140 sq ft ÷ 1.78 sq ft = 78.65 tiles (round up to 79)

For diamond layout, use 15% waste: 79 × 1.15 = 90.85 tiles (round up to 91)

Question 10: How many 600×600 mm tiles are needed for a corridor (20m x 1.2m) with a herringbone pattern?

Answer: 53 tiles

Corridor area: 20m × 1.2m = 24 sq m

Each 600×600 mm tile covers 0.36 sq m

Tiles needed: 24 sq m ÷ 0.36 sq m = 66.67 tiles (round up to 67)

For herringbone pattern, use 20% waste: 67 × 1.20 = 80.4 tiles (round up to 81)

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Frequently Asked Questions

How many tiles do I need for a 10x10 room?

For a 10x10 room using 12×12 inch tiles, you would need 100 tiles plus 10% waste, totaling 110 tiles. For larger tiles like 18×18 inch, you would need 50 tiles plus 10% waste, totaling 55 tiles.

Should I include wastage in tile calculations?

Yes, you should always include a waste factor in your tile calculations. For simple layouts, 5-10% is sufficient. For complex patterns, diagonal installations, or rooms with many cuts, 15-20% is recommended.

How do I calculate wall tiles for a shower?

To calculate wall tiles for a shower, measure the height and width of each wall to be tiled. Multiply these dimensions to get the area of each wall, then add them together. Don't forget to subtract the area of any doors or windows. Add 10-15% for waste.

What's the best tile size for small bathrooms?

For small bathrooms, larger tiles (12×12 inch or larger) can actually make the space appear bigger because there are fewer grout lines. However, smaller tiles offer more flexibility for fitting around fixtures and creating patterns.

Can I calculate tiles for a circular area?

Yes, you can calculate tiles for a circular area. First, calculate the area of the circle using the formula πr² (pi times radius squared). Then divide this area by the area of one tile. Add a higher waste factor (15-20%) for circular areas due to the increased cutting required.

Expert Tips for Tiling Projects

Preparation is Key

Ensure your surface is clean, level, and dry before beginning. Any imperfections in the substrate will show through in the finished tile work.

Measure Twice, Cut Once

Take precise measurements and double-check them before making any cuts. It's better to be conservative with your cuts and adjust as needed.

Plan Your Layout

Before applying adhesive, dry lay your tiles to determine the best starting point and layout. This helps avoid awkward cuts and ensures a balanced appearance.

Don't Rush

Allow adequate drying time between steps. Rushing the process can lead to uneven tiles, lippage, and other issues that are difficult to fix later.

Order Extra

Always order 10-15% extra tiles to account for breakage and cutting. Keep these extras for future repairs, as matching the exact dye lot later can be difficult.

Seal Properly

Apply appropriate sealers to protect your tiles and grout from moisture and stains. This is especially important in wet areas like bathrooms and kitchens.

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