Flooring Calculator
Calculate how much flooring to buy and what it costs. A 15 x 12 ft room needs 10 boxes and costs about $1,240.00 installed.
How much flooring do you need
Multiply room length by width, add 5 to 15% for waste and cuts, then divide by the coverage of one box. Always round up to whole boxes.
A 15 x 12 ft room is 180 sq ft. With 10% waste you need 10 boxes of 20 sq ft each. Materials cost $700.00 and with installation at $3 per sq ft the total is $1,240.00, or $6.89 per sq ft.
Waste by layout
- Straight lay: 5 to 10%
- Diagonal or herringbone: 15%
- Many closets, angles or stairs: 15 to 20%
Typical flooring costs
Laminate and vinyl plank often cost $2 to $7 per sq ft installed, hardwood $8 to $18, tile $8 to $20. Always buy one extra box for future repairs. Tiling instead? Use the tile calculator.
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Frequently asked questions
How much extra flooring should I buy?
Add 10% for simple rooms and 15% for diagonal layouts or complex shapes.
How do I measure a room for flooring?
Measure length and width in feet and multiply. For L shaped rooms split the room into rectangles and add them.
How much does flooring cost per square foot?
Material runs $1 to $12 per sq ft and installation $2 to $8 depending on type.
Do I need underlayment?
Most floating floors need underlayment. Add it to your material cost.
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