9x9 in square feet, square yards and square meters
A child's bedroom or a study is about this size. The area is length times width: 9 × 9 = 81 sq ft. Measure to the walls at the longest point, and add closets and alcoves you will floor.
| Unit | This room |
|---|---|
| Square feet | 81 sq ft |
| Square yards | 9.00 sq yd |
| Square meters | 7.53 sq m |
| Perimeter (around the walls) | 36 ft |
| Acres | 0.00186 acres |
What to buy for 81 sq ft
| Material | Amount |
|---|---|
| Flooring (10% waste, 20 sq ft boxes) | 89 sq ft, 5 boxes |
| Carpet off a 12 ft roll (before trimming) | 12.0 sq yd, one piece |
| 12 × 12 in tiles (10% waste) | 90 tiles |
| Baseboard (full perimeter, before doorways) | 36 ft |
Flooring with different waste allowances
Straight layouts need about 5 to 7%, diagonal layouts 10%, and herringbone or patterns 15%.
| Waste | Flooring to buy | Boxes of 20 sq ft |
|---|---|---|
| 5% waste | 85 sq ft | 5 |
| 10% waste | 89 sq ft | 5 |
| 15% waste | 93 sq ft | 5 |
Use the square footage calculator for L-shaped rooms, circles and triangles, the carpet calculator for the roll layout with trimming, or the flooring calculator and flooring for a 9x9 room for a full flooring estimate.
A 9 × 9 room: 81 square feet in a square
Nine by nine gives 81 sq ft. It is a common size for a child's bedroom, a study or a breakfast room in older houses. The square shape means furniture can go on any wall, but nothing long fits twice: the diagonal is only 12.7 ft. A 6 ft round or square rug sits with 1.5 ft of floor showing on every side.
Nine feet is exactly three yards, so the floor is a whole 9 sq yd, and the carpet order is 12.0 sq yd: one piece 12 ft wide and 9 ft long off the roll. For hard flooring buy 5 boxes of 20 sq ft (89 sq ft). The walls are 288 sq ft at 8 ft high, or 237 sq ft after openings, and 1 gallon + 2 quarts of paint does two coats.
Want to change anything else? The calculator above is the full Square Footage Calculator: edit any number and the results update instantly.
Frequently asked questions
How many square feet is a 9x9 room?
81 square feet (9 ft × 9 ft). That is 9.00 square yards or 7.53 square meters.
How many square feet of flooring do I need for a 9x9 room?
The floor is 81 sq ft, so buy about 89 sq ft with 10% for cuts and waste. That is 5 boxes at 20 sq ft a box.
How much carpet is a 9x9 room?
9.00 square yards of floor. Carpet comes off a 12 ft wide roll, so you buy whole strips: here one 12 ft wide piece 9 ft long, which is 108 sq ft (12.0 sq yd) of carpet for an 81 sq ft floor, plus a few inches a strip for trimming.
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.