Tile Calculator
Calculate the exact number of tiles needed for any room. Enter room dimensions, tile size, grout spacing, and waste factor to get accurate estimates for tiles, grout, adhesive, and total project cost.
How Tile Calculations Work
This calculator estimates the number of tiles you need for any room, taking into account grout spacing and waste factor. It also calculates the amount of grout, adhesive, and the total project cost.
Room Area Calculation:
Rectangle: Area = Length × Width
Square: Area = Side²
Circle: Area = π × Radius²
L-Shape: Area = (A × B) + (C × D)
Tile Area with Grout:
Tile Area = (Tile Width + Grout) × (Tile Length + Grout)
Tiles Needed:
Total Tiles = (Room Area × (1 + Waste Factor)) ÷ Tile Area
Cost Calculation:
Tile Cost = Total Tiles × Price per Tile
Grout Cost = Room Area × Grout Cost per sq ft
Total Cost = Tile Cost + Grout Cost + Adhesive Cost + Installation Cost
For example: A 12ft × 10ft room (120 sq ft) with 12×12 tiles, 1/8″ grout, and 10% waste: Tile area = (12 + 0.125) × (12 + 0.125) = 147.5 sq in = 1.024 sq ft. Tiles needed = 120 × 1.1 ÷ 1.024 ≈ 129 tiles.
Understanding Tile Types
- Ceramic Tile: Affordable, durable, easy to clean. Great for floors and walls.
- Porcelain Tile: Denser and more water-resistant than ceramic. Ideal for bathrooms and high-traffic areas.
- Glass Tile: Beautiful and reflective. Often used for backsplashes and accent walls.
- Natural Stone: Marble, granite, slate, travertine. Unique and luxurious but requires sealing.
- Mosaic Tile: Small tiles on a mesh sheet. Great for showers, backsplashes, and decorative patterns.
❓ Tile Calculator FAQ
How do I measure my room for tiles?
Measure the length and width of each section of the room. For rectangular rooms, multiply length × width. For L-shaped rooms, divide into two rectangles and add the areas. This calculator supports multiple room shapes.
What is a waste factor and why do I need it?
The waste factor (typically 5-15%) accounts for tiles lost to cuts, breakage, and pattern matching. It ensures you have enough tiles to complete your project without running short. For diagonal patterns, use a higher waste factor (15-20%).
How do I calculate the number of tiles needed?
Divide the room area (including waste) by the area of one tile (including grout). The formula is: (Room Area × (1 + Waste Factor)) ÷ (Tile Width × Tile Length). This calculator does this for you automatically.
What is the difference between tiles per square foot and tiles per box?
Tiles per square foot depends on the tile size. Tiles per box varies by manufacturer — typically 10-20 tiles per box for larger tiles and more for smaller tiles. This calculator shows both the total tiles needed and boxes needed.
How do I calculate grout for tiles?
Grout volume depends on tile size, grout width, and tile thickness. This calculator provides an estimated grout cost based on the room area. For accurate grout volume, you'll need to account for tile thickness and grout joint depth.
What is the average cost of tile installation?
Tile installation costs typically range from $5-15 per square foot, depending on the tile type, pattern complexity, and location. This calculator includes an optional installation cost field.
How many 12x12 tiles do I need for 100 square feet?
Each 12×12 tile covers 1 square foot. For 100 sq ft with a 10% waste factor, you need 110 tiles. This calculator handles the math for any tile size.
What is the difference between floor tile and wall tile?
Floor tiles are thicker, more durable, and have a higher slip resistance rating. Wall tiles are thinner and lighter. Some tiles can be used for both. Always check the manufacturer's recommendations.
How do I calculate tiles for a backsplash?
Measure the height and width of the backsplash area. For kitchens, this is typically the area between the countertop and upper cabinets. This calculator can be used for any wall or floor area.
What is the best grout width for tiles?
Grout width depends on tile size and type. Rectified tiles (precision-cut) can have 1/16″ grout lines. Standard tiles typically use 1/8″ to 1/4″ grout lines. Larger tiles often look better with wider grout lines.
How do I calculate tiles for a circular room?
Area = π × Radius². For a circular room with radius 10 feet, area = 3.14 × 100 = 314 square feet. This calculator includes a circle shape option.
What is the average cost of tile per square foot?
Tile costs vary widely: ceramic tiles $1-5/sq ft, porcelain $3-10/sq ft, glass $10-25/sq ft, natural stone $5-30+/sq ft. This calculator uses the price per tile you enter.
How do I calculate tiles for a shower?
Measure the height and width of each wall in the shower. Add the areas together for the total square footage. This calculator works for any wall or floor area.
What is the difference between square feet and square meters?
1 square meter = 10.7639 square feet. This calculator automatically converts between imperial and metric units.
How do I calculate tiles for a diagonal pattern?
Diagonal patterns require more tiles due to increased cutting waste. Use a higher waste factor (15-20%) for diagonal installations. This calculator lets you adjust the waste factor.
How accurate is this tile calculator?
This calculator provides accurate estimates based on the measurements you enter and standard formulas. Always add extra material for waste and check with your local supplier for exact quantities and pricing.
What is the difference between thinset and mastic?
Thinset (cement-based) is used for floor tiles and wet areas. Mastic (organic adhesive) is used for wall tiles in dry areas. This calculator estimates adhesive cost based on square footage.