Flooring Calculator
Enter the room's length and width, your waste allowance and how much one box covers. The calculator tells you how many square feet and how many boxes to order.
Type a number and the answer appears straight away.
Flooring needed198 sq ft10 boxes
- Room area
- 180 sq ft
- Waste allowance
- 18 sq ft
- Square meters
- 18.39
- Left over after the job
- 20 sq ft
Keep a spare box for future repairs: matching a discontinued floor later is difficult.
The math behind it: Flooring
boxes = room area x (1 + waste) / coverage per box, rounded up
A 12 ft by 15 ft room is 180 square feet. Adding 10% for cuts brings it to 198 square feet, which is 10 boxes at 20 square feet a box. That leaves about a box in hand for repairs later.
Common questions
How much flooring do I need?
Multiply the room's length by its width for the area, then add 10% for waste. A 180 square foot room needs about 198 square feet of flooring.
How many boxes of flooring do I need?
Divide the square feet you need, including waste, by the coverage printed on the box, and round up. 198 square feet at 20 per box is 10 boxes.
How much waste should I allow for flooring?
10% for a simple rectangular room laid straight, and up to 15% for diagonal layouts or rooms with many angles.
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