Tile Calculator: Estimate Tiles for Your Floor or Wall Project
Tiling a floor, backsplash, or shower requires precise material estimates. Order too few tiles and you risk color variation between batches. Order too many and you waste money on non-returnable tiles. Our Tile Calculator estimates the number of tiles needed, the required grout and thinset, and the total cost based on room dimensions, tile size, and layout pattern. Use our Tile Calculator to estimate your costs.
How Tile Calculations Work
The basic calculation: total tiles = (room area / tile area) + waste factor. Each tile covers a specific area based on its dimensions. A 12×12 inch tile covers 1 square foot. A 6×24 inch tile covers 1 square foot. For walls, measure the width and height of each wall section separately. For floors, measure length and width.
Always include waste: 10% for straight layouts, 15% for diagonal layouts, and 20% for complex patterns like herringbone or basket weave. These extra tiles cover cuts, breakage during installation, and future repairs.
Using the Tile Calculator
Enter the room dimensions (length and width for floors, width and height for walls). Enter the tile dimensions (length and width). Select the layout pattern (straight grid, diagonal, herringbone, or brick). Specify the grout joint width (typically 1/8 inch for rectified tiles, 3/16 to 1/4 inch for non-rectified tiles).
The calculator shows the number of tiles needed by piece and by box, the total square footage, the estimated grout and thinset quantities, and a visual layout diagram. You can enter the tile price per piece or per square foot for cost estimates.
Tile Types
Ceramic Tile
Most common. Affordable, available in endless colors and patterns. Glazed ceramic has a protective coating. Unglazed is more natural but requires sealing. Suitable for walls and light-traffic floors. Price: $1-15 per square foot.
Porcelain Tile
Denser and harder than ceramic. Through-body color means chips are less visible. Lower water absorption (under 0.5%) makes it suitable for bathrooms, kitchens, and outdoor use. Price: $3-20 per square foot.
Natural Stone
Marble, granite, travertine, slate, and limestone. Each piece is unique. Requires sealing and more maintenance. Suitable for floors, walls, and countertops. Price: $5-30+ per square foot.
Glass Tile
Used for backsplashes, accent walls, and decorative borders. Available in sheets of small tiles (1×1 or 2×2 inch mosaics). Requires special thin-set and grout. Price: $7-30 per square foot.
Grout and Thinset Estimation
Grout fills the joints between tiles. The amount needed depends on tile size, joint width, and tile thickness. Larger tiles with wider joints need more grout. Dark grout hides stains better than light grout but shows efflorescence more.
Thinset mortar bonds tiles to the substrate. Coverage depends on trowel notch size: 1/4×1/4 inch trowel covers about 50-60 sq ft per 50-lb bag. Larger tiles need larger notches and more thinset. Our calculator estimates both grout and thinset based on your specific project.
Layout Patterns and Waste Factors
- Straight grid: 10% waste — simplest pattern, fewest cuts
- Brick/running bond: 10-12% waste — offset pattern, slightly more cuts
- Diagonal: 15% waste — more angled cuts along walls, more breakage risk
- Herringbone: 20% waste — complex angled pattern, many small cuts
- Basket weave: 20% waste — intricate pattern with multiple tile sizes
- Modular patterns: 15-20% waste — patterns using multiple tile sizes require careful layout planning
Real-World Example
A 5×7 foot bathroom floor with 12×12 inch porcelain tiles, straight grid pattern, 1/8-inch grout joints:
- Floor area: 5 × 7 = 35 sq ft
- Tiles needed (no waste): 35 tiles (each covers 1 sq ft)
- Add 10% waste: 35 × 1.10 = 38.5, round up to 39 tiles
- Tiles per box (typically 10): 39 / 10 = 3.9, order 4 boxes
- Thinset: 35 sq ft / 55 sq ft per bag = 0.64, order 1 bag
- Grout (sand-based): Approximately 5-7 lbs for 35 sq ft at 1/8-inch joints
If using a diagonal pattern: 35 × 1.15 = 40.25, round up to 41 tiles, order 5 boxes (50 tiles, keeping extra for future repairs).
Start Calculating
Use our Tile Calculator below to estimate your tiling material needs accurately. Also check our Flooring Calculator for other flooring options and our Square Footage Calculator for area measurements.
Comparing Tile Formats for the Same Floor
Because tiles come in different sizes, the same square footage needs very different piece counts. For an 80-square-foot room, a 12 × 12 inch tile (1 sq ft each) needs 80 tiles, or 88 with 10% waste — about 9 boxes of 10. A 12 × 24 inch tile (2 sq ft each) needs 40 tiles, or 44 with waste, so about 4.5 boxes — round up and order 5. A 6 × 24 inch plank also covers 1 sq ft per piece, matching the 12 × 12 count at 80 tiles, but the longer format changes the visual layout and creates different cut patterns at the edges.
Piece count matters for waste because large-format tiles are pricier per piece — a single cracked 12 × 24 tile is costlier to replace than one 12 × 12, which is one reason installers often bump large-format waste toward 15% to keep spare tiles on hand for future repairs.
Related Calculators
Use our Tile Calculator Guide together with related tools such as Bricks Calculator, BTU Calculator, Concrete Calculator 0967371417 to plan more accurately. Each calculator runs instantly in your browser with step-by-step guidance.
Written by the CalcMaster Pro Editorial Team — financial, health, and DIY tools reviewed for accuracy. All calculators run on standard, widely accepted formulas. Always confirm final numbers with a qualified professional for decisions that require official figures.