Tile Calculator

Tile Calculator-Use our free Tile Calculator to estimate how many tiles you need for a floor, wall, bathroom, kitchen, or other space. Calculate tile quantity, All Online Calculators, area, boxes, cost, and wastage.

Planning a new floor, bathroom, kitchen backsplash, or wall project? A Tile Calculator can help you estimate how many tiles you need before you buy them.

You can enter the length and width of your room, choose the tile size, and calculate the total number of tiles required. You can also allow for tile wastage, check the estimated number of boxes, and work out the approximate tile cost.

This can help you avoid two common problems: buying too few tiles or spending money on far more tiles than you need.

The calculator can be useful for:

• Floor tiles
• Wall tiles
• Bathroom tiles
• Kitchen tiles
• Shower tiles
• Backsplash tiles
• Patio tiles
• Garage floors
• Living room floors
• Bedroom floors
• Outdoor tiles
• Large-format tiles
• Square and rectangular tiles

What Does a Tile Calculator Do?

A tile calculator estimates the amount of tile required to cover a particular area.

It normally uses:

• Room length
• Room width
• Tile length
• Tile width
• Tile wastage percentage

The basic calculation is:

Room Area = Length × Width

Then:

Tiles Needed = Total Area ÷ Tile Area

A little extra tile should normally be purchased to account for cuts, breakage, corners, difficult areas, and future repairs.

How to Calculate How Many Tiles You Need

The easiest method is to calculate the room area first.

Suppose your room is:

12 ft long

and:

10 ft wide

Room area:

12 × 10 = 120 square feet

Now suppose each tile is:

2 ft × 2 ft

Tile area:

2 × 2 = 4 square feet

Tiles required:

120 ÷ 4 = 30 tiles

So you need at least:

30 tiles

before adding extra tiles for wastage.

How Much Extra Tile Should You Buy?

It is usually a good idea to buy extra tiles instead of ordering the exact calculated quantity.

The amount of extra tile depends on the project.

A simple room with straight walls may need less extra material, while a room with many corners, angles, patterns, or complicated cuts may need more.

A common planning range is around:

10% extra for normal wastage

For a more complicated layout, you may need around:

15% or more

The exact amount depends on the tile, room shape, installation pattern, and skill of the installer.

Tile Wastage Calculator

Suppose your calculated requirement is:

100 square feet

and you add:

10% wastage

Extra tile:

100 × 10% = 10 square feet

Total tile to buy:

100 + 10 = 110 square feet

So you would plan for approximately:

110 square feet of tile

Why Is Tile Wastage Important?

Tiles often need to be cut around:

• Walls
• Doors
• Cabinets
• Toilets
• Drains
• Pipes
• Corners
• Columns
• Fixtures

Some tiles may also break during transportation or installation.

Keeping a few extra tiles can also be useful later if a tile becomes cracked or damaged and needs to be replaced.

Tile Calculator for a Floor

To calculate tiles for a rectangular floor:

Floor Area = Length × Width

For example:

15 ft × 12 ft = 180 sq ft

If your tiles cover 2 sq ft each:

180 ÷ 2 = 90 tiles

With 10% extra:

90 × 1.10 = 99 tiles

You would therefore plan for approximately:

99 tiles

If tiles are sold by the box, check how much area one box covers before purchasing.

Tile Calculator for a Wall

The same basic method works for walls.

Calculate:

Wall Area = Wall Length × Wall Height

For example:

10 ft × 8 ft = 80 sq ft

If there are multiple walls, calculate each wall separately and add the areas together.

If there is a door or window, its area can be subtracted if you want a more precise estimate.

Bathroom Tile Calculator

Bathrooms can be slightly harder to calculate because they may have:

• Multiple walls
• Doors
• Windows
• Shower areas
• Niches
• Pipes
• Fixtures
• Different tile layouts

For bathroom walls, calculate each wall separately.

For example:

Wall 1 = 8 × 7 = 56 sq ft

Wall 2 = 6 × 7 = 42 sq ft

Total:

56 + 42 = 98 sq ft

Then subtract areas that will not be tiled if appropriate and add your planned wastage.

Shower Tile Calculator

For a shower wall, calculate:

Wall Width × Wall Height

If there are three shower walls, calculate all three areas.

For example:

• Back wall: 5 × 7 = 35 sq ft
• Side wall: 3 × 7 = 21 sq ft
• Side wall: 3 × 7 = 21 sq ft

Total:

77 sq ft

Then add an appropriate amount of extra tile.

For wet areas, make sure the tile and installation materials are suitable for the application.

Kitchen Backsplash Tile Calculator

A backsplash usually covers a smaller area, but there may be many outlets, corners, cabinets, and other obstacles.

Calculate:

Backsplash Length × Backsplash Height

For example:

12 ft × 1.5 ft = 18 sq ft

With 10% extra:

18 × 1.10 = 19.8 sq ft

You would plan for about:

20 sq ft

of tile, depending on package sizes.

Tile Calculator for Multiple Areas

If you have several rooms or sections, calculate each area separately.

For example:

Living Room

20 × 15 = 300 sq ft

Bedroom

12 × 12 = 144 sq ft

Hallway

10 × 4 = 40 sq ft

Total:

300 + 144 + 40 = 484 sq ft

If you add 10% wastage:

484 × 1.10 = 532.4 sq ft

You would plan to purchase enough tile to cover approximately:

533 sq ft

subject to package sizes and your installation plan.

How to Calculate Tile Area

For a rectangular tile:

Tile Area = Tile Length × Tile Width

Make sure both measurements use the same unit.

For example:

A tile measuring:

12 in × 24 in

has an area of:

288 square inches

To convert to square feet:

288 ÷ 144 = 2 sq ft

So one 12 × 24 inch tile covers:

2 square feet

Tile Size Calculator

Popular tile sizes include:

• 12 × 12 inches
• 12 × 24 inches
• 18 × 18 inches
• 24 × 24 inches
• 6 × 6 inches
• 4 × 4 inches
• 300 × 300 mm
• 300 × 600 mm
• 600 × 600 mm
• 600 × 1200 mm

Tile size affects the number of individual tiles required.

A larger tile can cover more area per piece, but it may create more cutting challenges in small or irregular rooms.

How Many 12×12 Tiles Do I Need?

A 12 × 12 inch tile covers:

1 square foot

Therefore, a:

100 sq ft

area needs approximately:

100 tiles

before adding wastage.

With 10% extra:

100 × 1.10 = 110 tiles

So approximately:

110 tiles

would be needed.

How Many 12×24 Tiles Do I Need?

A 12 × 24 inch tile covers:

2 square feet

For a:

200 sq ft

area:

200 ÷ 2 = 100 tiles

With 10% extra:

100 × 1.10 = 110 tiles

So you would plan for approximately:

110 tiles

How Many 24×24 Tiles Do I Need?

A 24 × 24 inch tile covers:

4 square feet

For a:

400 sq ft

area:

400 ÷ 4 = 100 tiles

With 10% extra:

100 × 1.10 = 110 tiles

Therefore, approximately:

110 tiles

would be needed.

Tile Calculator in Square Feet

Square feet are commonly used for room and flooring calculations.

The formula is:

Area = Length in feet × Width in feet

For example:

20 ft × 10 ft = 200 sq ft

If the area is irregular, divide it into smaller rectangles, calculate each area, and add them together.

Tile Calculator in Square Meters

For metric measurements:

Area = Length in meters × Width in meters

For example:

5 m × 4 m = 20 m²

If a tile measures:

0.5 m × 0.5 m

its area is:

0.25 m²

Tiles required:

20 ÷ 0.25 = 80 tiles

Add extra tiles for cuts and wastage.

Square Feet to Square Meters

A useful conversion is:

1 square foot = 0.092903 square meters

Therefore:

100 sq ft ≈ 9.29 m²

And:

1 m² ≈ 10.764 sq ft

This is useful when your room dimensions and tile packaging use different measurement systems.

Tile Boxes Calculator

Tiles are often sold in boxes rather than individually.

If one box covers:

20 sq ft

and your project requires:

110 sq ft

then:

110 ÷ 20 = 5.5 boxes

Since you cannot normally purchase half a box, you would need:

6 boxes

Always check the manufacturer’s stated coverage because the number of tiles per box can vary.

How Many Tiles Are in a Box?

There is no single answer.

The number of tiles in a box depends on:

• Tile size
• Tile thickness
• Manufacturer
• Product
• Packaging

A box may contain a different number of tiles but still cover a similar total area.

For this reason, coverage per box is usually more useful than simply counting tiles.

Tile Cost Calculator

You can also estimate the material cost.

The basic formula is:

Tile Cost = Tile Area Required × Price Per Square Unit

For example:

Required tile:

500 sq ft

Price:

$3 per sq ft

Estimated tile cost:

500 × $3 = $1,500

This is only the tile material cost.

Other project costs may include:

• Adhesive
• Grout
• Backer board
• Underlayment
• Trim
• Delivery
• Labor
• Removal of old flooring

Tile Installation Cost

The final project cost can be much higher than the tile purchase price.

A complete estimate may include:

Tile Cost + Installation Labor + Materials + Preparation + Other Fees

Labor costs vary by location and project difficulty.

Factors that can increase installation cost include:

• Complex patterns
• Small tiles
• Large-format tiles
• Many cuts
• Uneven surfaces
• Removal of old tile
• Waterproofing
• Difficult access

Tile Calculator With Grout

Grout is normally needed between tiles.

The amount required depends on:

• Tile size
• Tile thickness
• Grout joint width
• Total tiled area

Smaller tiles usually create more grout joints than larger tiles.

For a precise grout estimate, use the grout manufacturer’s coverage information or a dedicated grout calculator.

Tile Calculator With Grout Width

The width of the grout joint can affect the final layout.

For example:

A 12-inch tile installed with a grout joint will not occupy exactly 12 inches of continuous finished space in the same way as a tile installed edge-to-edge.

The actual layout should account for:

• Tile dimensions
• Grout joint
• Room dimensions
• Perimeter cuts
• Expansion or movement requirements where applicable

Tile Layout Patterns

The installation pattern can affect the amount of waste.

Common patterns include:

• Straight lay
• Grid
• Running bond
• Brick pattern
• Herringbone
• Stack bond
• Diagonal layout

A simple straight layout may produce less waste than a more complicated pattern.

Patterns with many angled cuts may require additional tiles.

Large Format Tile Calculator

Large-format tiles can cover a large area with fewer pieces.

However, they require careful planning because:

• Walls and floors may not be perfectly square.
• Large tiles can require special handling.
• Cuts may be more noticeable.
• Substrate flatness becomes more important.

Do not choose a large tile only because the calculator shows fewer pieces. The room and installation conditions also matter.

Tile Calculator for Odd-Shaped Rooms

Not every room is a perfect rectangle.

For an L-shaped room, divide the space into rectangles.

For example:

Area 1 = 12 × 10 = 120 sq ft

Area 2 = 6 × 5 = 30 sq ft

Total:

150 sq ft

Then add the desired wastage percentage.

This method also works for many other irregular layouts.

How to Measure a Room for Tile

Before using a tile calculator, measure the space carefully.

For a rectangular room:

Measure:

Length

and:

Width

Then multiply them.

For walls:

Measure:

Width

and:

Height

For irregular rooms:

Break the space into smaller sections.

Measure each section and add the areas together.

Should I Subtract Doors and Windows?

If a door, window, cabinet, or other area will definitely not receive tile, you can subtract its area from the total.

For example:

Total wall area:

100 sq ft

Door area:

20 sq ft

Net tile area:

100 − 20 = 80 sq ft

Then add an appropriate amount of wastage.

For complicated installations, many installers prefer to calculate the full area and account for cuts and waste rather than relying on exact deductions.

Tile Calculator for a Circular Area

A circular area uses a different formula.

Area = π × r²

where:

r = radius

For example, if the radius is:

5 ft

then:

Area ≈ 3.14159 × 25

≈ 78.54 sq ft

You can then divide the area by the coverage of one tile and add extra material.

Circular and curved areas often require more cutting, so actual waste may be higher.

Tile Calculator for Steps

Steps can be calculated by finding the area of each tiled surface.

For each stair, you may need to measure:

• Tread
• Riser
• Width

Calculate each surface separately and add them together.

Because stairs require many cuts, it is sensible to plan additional material.

Tile Calculator for Patio

For a rectangular patio:

Length × Width = Area

For example:

20 ft × 15 ft = 300 sq ft

With 10% extra:

300 × 1.10 = 330 sq ft

The actual quantity should also account for the tile layout and cutting requirements.

For outdoor projects, make sure the selected tile is suitable for outdoor conditions and the expected weather exposure.

Tile Calculator for Garage

A garage floor can be calculated using the same area formula:

Length × Width

For example:

24 ft × 20 ft = 480 sq ft

With 10% extra:

480 × 1.10 = 528 sq ft

For a garage, make sure the tile is rated for the expected loads, vehicle traffic, moisture, and temperature conditions.

Tile Calculator for Different Rooms

You can use the calculator for almost any rectangular space.

Examples include:

• Bedroom
• Living room
• Dining room
• Kitchen
• Bathroom
• Laundry room
• Hallway
• Garage
• Balcony
• Patio

The basic calculation remains:

Area = Length × Width

How Accurate Is a Tile Calculator?

A tile calculator can provide a very good estimate, but it cannot replace careful measurement and installation planning.

The final quantity can change because of:

• Room shape
• Tile size
• Tile pattern
• Grout spacing
• Cuts
• Breakage
• Tile defects
• Installer technique
• Doors and fixtures

For this reason, treat the calculator result as a planning estimate and confirm quantities before placing a large order.

What Information Do I Need Before Buying Tile?

Before ordering, check:

• Room dimensions
• Tile dimensions
• Coverage per box
• Number of tiles per box
• Tile lot or batch information
• Recommended installation method
• Required grout
• Required adhesive
• Recommended wastage allowance

If possible, purchase enough tile from the same production batch for the entire project. Slight shade or texture differences can sometimes occur between batches.

How to Use the Tile Calculator

Step 1: Measure the Area

Enter the room length and width.

Step 2: Enter Tile Size

Enter the tile length and width.

Step 3: Add Wastage

Choose an appropriate percentage based on the project.

Step 4: Calculate

The calculator estimates the number of tiles required.

Step 5: Check Box Coverage

If tiles are sold by the box, enter the coverage per box to estimate how many boxes you need.

Step 6: Estimate Cost

If you know the price per square foot or square meter, you can calculate an approximate material cost.

Tile Calculator Tips

Measure Twice

A small measurement mistake can affect the final tile quantity.

Use the Same Units

Do not mix feet with inches or meters with centimeters without converting them first.

Add Extra Tiles

Allow for cutting and breakage.

Check Box Coverage

The number of tiles per box is less important than the total area covered by each box.

Consider the Pattern

Herringbone and diagonal layouts can create more waste.

Keep Spare Tiles

Keeping a few matching tiles can make future repairs much easier.

Check the Product Label

Tile coverage, installation requirements, and recommended materials can vary by product.

Frequently Asked Questions

What is a Tile Calculator?

A Tile Calculator estimates how many tiles are needed to cover a floor, wall, backsplash, bathroom, patio, or other area.

How do I calculate how many tiles I need?

First calculate the total area, then divide it by the area covered by one tile.

Tiles Needed = Total Area ÷ Tile Area

Add extra tiles for cutting and wastage.

How much tile waste should I allow?

Around 10% extra is a common starting point for a straightforward project. More may be appropriate for complicated layouts, many cuts, or unusual room shapes.

How many 12×12 tiles do I need for 100 square feet?

A 12×12 inch tile covers 1 square foot, so you need at least 100 tiles before adding wastage.

With 10% extra, plan for approximately 110 tiles.

How many 12×24 tiles do I need for 100 square feet?

A 12×24 inch tile covers 2 square feet.

100 ÷ 2 = 50 tiles

With 10% extra:

55 tiles

How many 24×24 tiles do I need for 100 square feet?

A 24×24 inch tile covers 4 square feet.

100 ÷ 4 = 25 tiles

With 10% extra:

28 tiles, after rounding up.

How do I calculate tile cost?

Multiply the required tile area by the price per square foot or square meter.

Tile Cost = Area × Price

Remember to include extra material for wastage when estimating your purchase.

Should I calculate floor and wall tiles separately?

Yes. Calculating each area separately makes it easier to account for different tile sizes, patterns, and installation requirements.

Do I need extra tiles?

Usually, yes. Extra tiles can cover cuts, breakage, defects, and future repairs.

How many boxes of tile do I need?

Divide the total required coverage by the coverage of one box and round up to the next whole box.

Does tile size affect wastage?

Yes. Tile size can affect how pieces fit into the room and how many cuts are required.

Does the tile pattern affect the amount of tile needed?

Yes. Patterns such as herringbone or diagonal layouts can create more cutting and waste than a simple straight layout.

Can I use the Tile Calculator for walls?

Yes. Multiply wall width by wall height and calculate each wall separately when necessary.

Can I use it for a bathroom?

Yes. Calculate the floor and each tiled wall area separately.

Can I use it for a backsplash?

Yes. Measure the backsplash length and height, then calculate the area.

Can I use the calculator for an irregular room?

Yes. Divide the room into smaller rectangles or other simple shapes, calculate each area, and add them together.

Should I subtract doors and windows?

You can subtract areas that will definitely not be tiled. However, make sure your final estimate still includes enough material for cuts and waste.

How many square feet does one tile cover?

It depends on the tile size. For example, a 12×12 inch tile covers 1 square foot, while a 12×24 inch tile covers 2 square feet.

What is the difference between tile area and room area?

Room area is the total space you want to cover. Tile area is the area covered by one tile.

Can I calculate tile grout with this calculator?

The tile quantity can be calculated separately from grout. Grout requirements depend on tile size, thickness, joint width, and other installation details.

Can I calculate tile adhesive?

Adhesive coverage varies by product and installation method. Check the manufacturer’s coverage information for a reliable estimate.

Is the Tile Calculator accurate?

It provides an estimate based on the measurements and tile information you enter. Actual requirements can vary because of cuts, layout, room shape, breakage, and installation conditions.

Is the Tile Calculator free?

Yes. The CalculatorGuides.com Tile Calculator is free to use.

Tile Calculator – Quick Reference

Calculation	Formula
Room Area	Length × Width
Wall Area	Width × Height
Tile Area	Tile Length × Tile Width
Tiles Needed	Room Area ÷ Tile Area
With Wastage	Required Area × (1 + Wastage %)
Boxes Needed	Required Area ÷ Box Coverage
Tile Cost	Required Area × Price per Unit Area
Circle Area	π × Radius²
1 ft	12 inches
1 m	100 cm
1 sq ft	0.092903 m²

---

Final Tile Buying Checklist

Before placing your tile order, check:

• Room length measured
•  Room width measured
• Wall height measured where needed
• Tile size confirmed
•  Total area calculated
• Wastage added
•  Box coverage checked
•  Number of boxes rounded up
• Tile pattern considered
• Grout quantity checked
•  Adhesive quantity checked
•  A few spare tiles planned

Conclusion

A Tile Calculator is a simple way to estimate how much tile you need before starting a flooring or wall project.

The basic calculation is:

Room Area = Length × Width

Then:

Tiles Needed = Room Area ÷ Tile Area

After that, add an appropriate amount of extra material for cuts, breakage, difficult areas, and future repairs.

For example, a 120 sq ft room using 2 sq ft tiles needs:

120 ÷ 2 = 60 tiles

With 10% extra:

60 × 1.10 = 66 tiles

If the tiles are sold by the box, use the manufacturer’s stated coverage to determine how many boxes to purchase.

A calculator gives you a useful starting estimate, but always check the tile manufacturer’s packaging, installation instructions, and coverage information before making your final purchase.

Use the CalculatorGuides.com Tile Calculator to calculate tile quantity, area, wastage, boxes, and estimated material cost for floors, walls, bathrooms, kitchens, backsplashes, patios, and other projects.