How Much Flooring for a 15x15 Room?
Boxes to order
11 boxes
225 square feet of floor, ten percent waste, boxes of 22.5 square feet.
When the figures look right, the flooring material list downloads as a real PDF with your business details on it, built inside your own browser. Nothing you type is uploaded anywhere.
How that number is worked out
These are the figures this page was built with and every line the calculator produces from them. Change anything above and all of it moves.
- Floor area225 sq ft
- Coverage per box or carton22.5 sq ft
- Waste allowance10 %
Boxes to order11 boxes
| Floor area | 225 sq ft |
|---|---|
| With 10% waste | 247.5 sq ft |
| Boxes at 22.5 sq ft | 11 |
| Coverage bought | 247.5 sq ft |
| Left over | 22.5 sq ftkeep it for repairs |
The material list this produces
| Flooring, boxes | 11 |
|---|---|
| Underlayment, sq ft | 225 |
| Transition strips, each | 2 |
Waste allowance compared
Waste is set by how you lay it. Straight lay to herringbone, same room.
| Waste allowance | Boxes to order | With 10% waste | Left over |
|---|---|---|---|
| 5% | 11 boxes | 236.3 sq ft | 22.5 sq ft |
| 10% | 11 boxes | 247.5 sq ft | 22.5 sq ft |
| 15% | 12 boxes | 258.8 sq ft | 45 sq ft |
| 20% | 12 boxes | 270 sq ft | 45 sq ft |
What else matters here
Two hundred and twenty five square feet with ten percent waste is 247.5, which happens to be exactly eleven cartons at 22.5 square feet. That is a rare clean landing and it means there is no hidden rounding cushion in the order, so any extra waste comes straight out of the spare.
If the room has a closet, an alcove or a bay, add that area separately rather than assuming the waste covers it. Waste allowance covers offcuts, not additional floor.
What this calculator assumes
- 10 percent waste covers a straight lay in a simple rectangle. Go to 15 for a diagonal or herringbone lay, and 20 if the room is cut up with closets and angles.
- Buy the whole job in one delivery. Dye lot and batch shade move between production runs, and a single replacement box six months later will not match.
Questions people ask
How many boxes of flooring for a 15x15 room?
About 11 boxes at 22.5 square feet each, covering 225 square feet with a ten percent waste allowance.
Should I add extra for a closet?
Yes. Measure the closet floor and add it to the room area rather than hoping the waste allowance covers it, because waste covers offcuts, not extra floor.
The flooring calculator takes any dimensions you like and hands back the same list.