Floor Tile Calculator
Your floor
Cabinet footprints, hearths, vents you are tiling around.
From the box label. Set to 0 to skip box count.
Tiles to buy
66
- Net floor area
- 120 sq ft
- With waste
- 132 sq ft
- Tile face area
- 2 sq ft
- Boxes to buy
- 9
Round up to full boxes. Keep one unopened box as your dye-lot match for repairs.
Tools the pros use for this job
Tile Wet Saw
Straight, chip-free cuts for floor tile all day long.
Leveling System
DGSL Tile Leveling System with Plier, 300 Tile Spacers 1/8" and 100 Wedges | Tile Leveling Clips with Tile Plier, Anti Lippage Tile Leveler Spacers for Professional Ceramic Tile and Stone Installation
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Knee Pads
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How this calculator works
Floor area is length × width, minus untiled areas. We divide the adjusted area by the face area of one tile, then add your waste factor and round up to full tiles and full boxes.
Tiles per box varies by manufacturer — check the box label, which also states the square feet per box. If you know coverage per box instead of pieces per box, divide your total square footage (with waste) by that number.
Frequently asked questions
How much waste should I add for floor tile?
10% for a straight layout in a rectangular room, 12–15% for offset or diagonal patterns, and up to 20% for herringbone. Keep one unopened box for future repairs.
Do I tile under kitchen cabinets or a vanity?
Most installers tile under appliances but not under fixed cabinets. Subtract the cabinet footprint, but tile under the dishwasher and fridge so the floor height stays even.
What size tile is best for a small floor?
12×24 and 12×12 are forgiving in small rooms. Very large tile (24×48) can make a small room choppy and needs a very flat floor; mosaic works anywhere but means more grout.
Related calculators
- Tile Quantity CalculatorHow many tiles you need for any room, wall, or floor — with waste.
- Waste Factor CalculatorHow much extra tile to buy for cuts, patterns, and breakage.
- Tile Layout & Pattern CalculatorCut sizes and row counts for grid, offset, diagonal, herringbone.
- Tile Cost EstimatorTotal project cost: tile, grout, mortar, trim, and labor.
Guides worth reading next
- How to Measure a Room for Tile (Step by Step)Measure any room for floor or wall tile: handle closets and alcoves, convert inches to decimals, subtract fixtures, and add the right waste percentage.
- Choosing the Right Tile Size for Your RoomHow tile size changes a room: when 12×24 beats 4×4, why small rooms can take large tile, grout line math, and the flatness rule for big formats.
- Sanded vs Unsanded vs Epoxy Grout: Which One Do You Need?Grout types explained by joint width and location: when sand scratches tile, why epoxy wins in showers, and how much of each type a bag actually covers.