Tile Calculator
Estimate required tile quantities, layout pattern waste buffers, carton packaging, dry grout weight, and thin-set adhesive mortar for residential and commercial tiling.
Tile Size
Area to Cover
Grout Gap & Wastage Allowance
Required Tile Material
Total tiles, packaging boxes, and grout requirements
165 Tiles
17 Boxes
Net Surface Area 150.0 sq ft
Gross Area (+Waste) 165.0 sq ft
Single Tile Area 1.02 sq ft
Grout Joint Length 330 ft
Estimated Material Cost $412.50
Based on selected pricing Tile & Grout Estimation Formulas
Tile calculations determine required piece counts and full carton purchases based on surface square footage, tile aspect ratios, joint grout consumption, and layout cutting patterns.
Formula:
Tiles Count = [Area_sqft × 144 / (Tile_W × Tile_L)] × (1 + Waste) | Boxes = ⌈Gross Sq Ft / Box Sq Ft⌉ Variables & Parameters
Net Area (Length × Width) - Deductions for doors/cabinets
Gross Area Net Area × (1 + Waste Percentage)
Tile Count Gross Area (sq in) / (Tile Length × Tile Width in inches)
Grout (lbs) [(L+W) / (L×W)] × Area × Grout_Width × Tile_Thickness × Density_Constant
Frequently Asked Questions
How many 12x12 tiles for 120 sq ft?
A 12x12 inch (1 sq ft) tile covers exactly 1.0 square foot. For a 120 sq ft floor or wall, the net requirement is 120 / 1.0 = 120 tiles. Adding the industry-standard 10% waste factor for edge cuts and perimeter fitting (120 × 1.10), you will need 132 tiles (approximately 9 to 10 cartons if packaged 14-15 tiles per box). For diagonal or herringbone layouts, add 15% (138 tiles).
How to calculate for tiles?
To calculate tile requirements: (1) Measure room or wall length and width in feet, multiplying them to find total square footage (Length × Width). (2) Subtract un-tiled openings like bathtubs, cabinets, or doorways. (3) Add a waste margin: 10% for standard straight grids, 15% for diagonal or herringbone patterns. (4) Calculate single tile area in square feet: (Tile Length in × Tile Width in) / 144. (5) Divide gross square footage by single tile area to get total tile count, then divide by carton box coverage to get required box count.
How do you calculate tiles for shower walls, floors, ceilings, and backsplashes?
Whether using this tool as a shower tile calculator, floor tile calculator, ceiling tile calculator, wall tile calculator, or backsplash tile calculator, calculate the total area in square feet (Length × Height for walls, Length × Width for floors/ceilings). Enter your tile size in square feet or inches (e.g. 12"×24", 3"×6" subway, 4"×4"). The tile calculator square feet automatically adds waste buffers (10% straight, 15% herringbone) and computes total boxes, thin-set mortar bags, and grout pounds.
How much extra tile should I order for waste?
Standard grid and straight-stack tile installations require 10% extra for cuts and breakage. Diagonal 45° patterns, herringbone layouts, and rooms with many corners/angles require 15% to 20% waste allowance.
How do you calculate grout weight for a tile installation?
Grout weight depends on tile dimensions (length, width, thickness), grout joint width, and total square footage. The standard formula computes total joint volume multiplied by dry grout powder bulk density (≈ 100 lbs/cu ft).