Flooring for an 11 × 13 ft room (143 ft²)
Box counts depend on how much each box holds, which is printed on the box (20 to 25 ft² is common for laminate and vinyl plank).
| Layout and waste | Flooring to buy | Boxes at 20 ft² | Boxes at 24 ft² | Boxes at 30 ft² |
|---|---|---|---|---|
| 5% (Straight, simple room) | 150.2 ft² | 8 | 7 | 6 |
| 7% (Typical room) | 153.0 ft² | 8 | 7 | 6 |
| 10% (Diagonal or many cuts) | 157.3 ft² | 8 | 7 | 6 |
| 15% (Herringbone or patterns) | 164.5 ft² | 9 | 7 | 6 |
Before you buy
Measure into doorways and closets, and buy one extra box for future repairs, since dye lots vary. Let the flooring acclimate in the room for as long as the maker says. See the waste factors guide.
Laying it out: rows and the last row
Planks usually run along the long wall (13 ft here), so they stack up across the 11 ft side, which is 132 inches. A last row that is only a sliver looks bad and can lift, so check it before you start. With 48 inch planks you need about 4 planks per row.
| Plank width | Rows across | Width of the last row | Check |
|---|---|---|---|
| 5 in plank | 27 | 2.0 in | Fine |
| 7 in plank | 19 | 6.0 in | Fine |
| 9 in plank | 15 | 6.0 in | Fine |
If the last row comes out under 2 inches, cut the first row narrower so that the first and last rows are about the same. Leave the expansion gap the maker specifies (usually about 1/4 to 1/2 inch) around the walls.
An 11 × 13 room: neither side fits a whole number of planks
An 11 × 13 ft room measures 143 sq ft. With 10% for cuts you buy 157.3 sq ft, so 8 boxes at 20 sq ft each or 7 at 24 sq ft.
Both dimensions are odd, so there is a ripped row on one wall and a cut plank at the end of every row. That is normal and the 10% covers it. Mark a chalk line for the first row a plank width from the longest straight wall instead of trusting the wall itself, since a wall that wanders over 13 ft makes every joint drift. The room is 48 ft around for trim.
Want to change anything else? The calculator above is the full Flooring Calculator: edit any number and the results update instantly.
Tools & materials for this project
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Frequently asked questions
How many boxes of flooring for an 11x13 room?
8 boxes at 20 ft² per box, including 10% waste (157.3 ft² needed for 143 ft² of floor). With 24 ft² boxes it is 7.
How much extra flooring should I buy for an 11x13 room?
5 to 10% for a simple straight layout, and 15% for diagonal or herringbone. For this room, 10% adds 14.3 ft².
How many square feet is an 11x13 room?
143 square feet (11 × 13). Add other rooms, hallways and closets you will floor, and measure into doorways.
Related sizes and guides
Estimates only. Results assume standard materials and simple shapes. Supplier products vary, and the final call on quantity, structure and safety is yours. Check your local code and your supplier's guidance before ordering.