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Floor Tile Quantity Calculator

Tiling a bathroom, kitchen, or entryway requires purchasing extra material to account for cutting around corners, edges, plumbing fixtures, and breakage.

Length of the floor area to be tiled in feet.

Width of the floor area to be tiled in feet.

Individual tile length (e.g., 12" for 12x12 tile).

Individual tile width (e.g., 12" for 12x12 tile or 24" for 12x24 tile).

Industry standard is 10% for grid patterns and 15% for diagonal / herringbone patterns.

Packaging count stated on the manufacturer tile carton.

Calculated Result
14 Boxes (132 Tiles)

Tile Order Quantity

Boxes of Tiles Needed

14 Boxes

Total Individual Tiles

132 tiles

Room Floor Area

120 sq ft

Purchased Coverage

140 sq ft

Waste Buffer

10%

Calculation Breakdown

  1. Floor Area to Tile Area RatioFloor area (120 sq ft) ÷ individual tile area (1 sq ft) = 120 net tiles.
  2. Cutting Waste AllowanceAdding 10% waste factor for cuts and corners = 132 total tiles (14 boxes at 10 tiles/box).

Tile Waste Percentage Guidelines by Layout Pattern

Interactive visualization based on your current inputs

Waste (%)
0.04.59.01418Straight Grid (Stacked)Subway (Offset / Brick)Diagonal (45° Angle)HerringboneTile PatternRecommended Waste Factor (%)

What Is the Floor Tile Quantity Calculator?

A floor tile calculator calculates total individual tiles and retail cartons required to cover a specified surface area.

How Does the Floor Tile Quantity Calculator Work?

Converts tile dimensions to square feet, divides total room floor area by single-tile area, and adds cutting buffers.

Floor Tile Quantity Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

Tiles = ⌈(Floor Area ÷ Tile Area) × (1 + Waste %)⌉

Divides floor area by individual tile coverage, adds the cutting waste allowance percentage, and rounds up to full units.

How to Use the Floor Tile Quantity Calculator

  1. Enter room dimensions, individual tile dimensions in inches, expected waste percentage, and carton size.

Step-by-Step Example Calculation

12′ × 10′ Room with 12″ × 12″ Tiles (10% waste)

Input Values:

roomLengthFt:12
roomWidthFt:10
tileLengthInches:12
tileWidthInches:12
wastePercent:10
tilesPerBox:10

Understanding Your Result

Shows exact net tiles, total tiles with waste, and full boxes to purchase at retail.

Factors That Affect the Result

  • Installation pattern (straight stack vs herringbone vs subway offset), room shape irregularities, and grout joint widths.

When Should You Use This Calculator?

  • Bathroom and kitchen remodels, outdoor patio tiling, and commercial flooring estimates.

Assumptions & Limitations

  • Assumes rectangular surface dimensions; complex angles may increase scrap requirements.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Tile Council of North America (TCNA) installation estimating guidelines.

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