Flooring & Tile Calculator
Figure out how many boxes or tiles you need for any floor — with a waste factor for cuts and breakage, plus the total material cost.
Use ~10% for straight layouts and 15%+ for diagonal or herringbone.
How to Calculate Flooring and Tile
First find the floor area — length × width for a rectangular room, or just enter a total if you already have it. Add a waste factor of around 10% so you have enough material for cuts, breakage, and future repairs, then divide by the coverage of one box or tile and round up. Boxes list their square-foot coverage on the carton; a single tile covers its width × height in inches divided by 144 to get square feet.
Diagonal, herringbone, and other patterned layouts create more offcuts, so bump the waste factor up to 15% or more for those installs. Buying a little extra from the same lot also protects you against dye-lot color shifts if you ever need replacements. This calculator handles boxes, loose tiles, the waste factor, and material cost all at once as you type.
Frequently Asked Questions
How many boxes of flooring do I need?
Divide your total square footage, including a waste allowance, by the square feet per box printed on the carton, then round up. For example, 220 sq ft of flooring in 20 sq ft boxes needs 11 boxes.
How much extra tile should I buy?
Plan on about 10% extra for straight layouts to cover cuts and breakage. Increase it to 15% or more for diagonal, herringbone, or patterned installations where there are many more cuts.
How do I calculate tile for a floor?
Measure the floor area (length × width), add a waste factor, then divide by the coverage of one tile or box. Tile coverage equals the tile width × height in inches divided by 144 to get square feet per tile.
Turn Your Measurements Into a Real Floor Plan
Once you know your dimensions, generate a labeled, to-scale floor plan in seconds — then export it to DXF or build it in 3D. No CAD experience needed.
More Construction Calculators
Square Footage Calculator
Area of rooms, walls, lots & irregular shapes
Concrete Calculator
Yards, bags & cost for slabs and footings
Paint Calculator
Gallons & cost to paint any room
Roof Pitch Calculator
Pitch, angle, rafter length & roof area
Stair Calculator
Rise, run & stringer with IRC code check
Drywall Calculator
Sheets, mud, screws & tape for any room
Lumber Calculator
Board feet, studs & framing cost
Beam & Joist Span Calculator
Quick span sizing for joists and beams
BTU Calculator
Heating & cooling load for any room
Egress Window Calculator
Check IRC net clear opening compliance
ADA Clearance Checker
Verify accessible clearances & turning space
Deck Material Calculator
Decking boards, joists & screws for a deck
Fence Calculator
Posts, rails, pickets & concrete for a fence
Gravel & Aggregate Calculator
Cubic yards & tons of gravel for any area
Mulch & Topsoil Calculator
Cubic yards & bags of mulch or topsoil
Insulation Calculator
Recommended R-value & batts by climate zone
Wallpaper Calculator
Rolls of wallpaper needed for a room
Baseboard & Trim Calculator
Linear feet & pieces of baseboard and crown
Concrete Block (CMU) Calculator
Blocks, mortar & courses for a block wall