Estimate flooring before you buy. Enter room length and width in feet (or a total area in sq ft), add a waste factor (default 10%), and choose either box coverage in sq ft per box or a plank/tile size in inches. Results show net area, area with waste, and whole boxes or pieces to order — a materials estimate, not a price.
Net flooring area is room length × width in feet, or the total area you enter. If you are flooring more than one identical room, multiply by the number of rooms. Area with waste is that net area times (1 + waste% / 100). The default waste factor is 10% for cuts, pattern match, and a spare board.
In box coverage mode, divide area with waste by the carton coverage (sq ft per box) and round up to a whole box. In plank or tile size mode, piece size is in inches: area of one piece is (length ÷ 12) × (width ÷ 12) square feet. Divide area with waste by that piece area and round up to a whole piece. If you also enter pieces per box, boxes are the piece count divided by pieces per box, again rounded up. This is a materials count only — it does not price the order.
A 12 × 10 ft room is 120 sq ft. Add 10% waste → 132 sq ft. At 20 sq ft per box, 132 ÷ 20 = 6.6, which rounds up to 7 boxes (140 sq ft of coverage, about 8 sq ft extra).
48 in × 6 in = 4 ft × 0.5 ft = 2 sq ft per plank. 132 sq ft with waste ÷ 2 sq ft = 66 pieces.
24 in × 6 in = 2 ft × 0.5 ft = 1 sq ft per plank. 132 ÷ 1 = 132 pieces.
roomArea = L×W (or totalArea); netArea = roomArea × rooms; areaWithWaste = netArea × (1 + waste%/100); boxesNeeded = ceil(areaWithWaste / sqFtPerBox); pieceArea = (lengthIn/12)×(widthIn/12); piecesNeeded = ceil(areaWithWaste / pieceArea); optional boxes = ceil(piecesNeeded / piecesPerBox)
This flooring calculator is an approximate materials estimate only, not a price or a purchase quote. Actual boards or tile required depend on layout direction, pattern, obstacles, and product coverage. Always confirm sq ft per box or piece size on the label and keep a few extra pieces for repairs. GlobalToolHub is not responsible for over- or under-purchasing materials.
Multiply room length by width in feet to get square feet (or enter a known total area). Multiply by the number of rooms if they are the same size. Multiply by 1.10 for a 10% waste factor. Divide by the box coverage in sq ft per box, or by the area of one plank, and round up to a whole box or piece.
10% is the default for a straight lay with ordinary cuts. Use about 5% for a simple rectangle with few obstacles, and 15% or more for diagonal installs, patterns, or irregular rooms. The field is editable from 0 to 100 percent.
Use box coverage (sq ft per box) when the carton label states it — that is the fastest order quantity. Use plank or tile size in inches when you know the piece dimensions and want a piece count. You can also enter pieces per box to turn that piece count into whole cartons.
Divide each side by 12 to get feet, then multiply. A 48 × 6 inch plank is 4 ft × 0.5 ft = 2 sq ft, not 1 sq ft. A 24 × 6 inch plank is 2 ft × 0.5 ft = 1 sq ft. This calculator always treats plank length and width as inches.
You cannot buy a fraction of a carton. 132 sq ft at 20 sq ft per box is 6.6 boxes, so the calculator returns 7 boxes. The extra coverage (here about 8 sq ft) is the leftover beyond the area with waste.
No. It estimates materials only: square feet, boxes, and pieces. It is not a quote, and it does not add tax, labor, underlayment, or trim. Confirm coverage on the product label before you buy.