15x15 in square feet, square yards and square meters
A large square living room is about this size. The area is length times width: 15 × 15 = 225 sq ft. Measure to the walls at the longest point, and add closets and alcoves you will floor.
| Unit | This room |
|---|---|
| Square feet | 225 sq ft |
| Square yards | 25.00 sq yd |
| Square meters | 20.90 sq m |
| Perimeter (around the walls) | 60 ft |
| Acres | 0.00517 acres |
What to buy for 225 sq ft
| Material | Amount |
|---|---|
| Flooring (10% waste, 20 sq ft boxes) | 248 sq ft, 13 boxes |
| Carpet off a 12 ft roll (before trimming) | 40.0 sq yd, 2 pieces |
| 12 × 12 in tiles (10% waste) | 248 tiles |
| Baseboard (full perimeter, before doorways) | 60 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 | 236 sq ft | 12 |
| 10% waste | 248 sq ft | 13 |
| 15% waste | 259 sq ft | 13 |
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 for a full flooring estimate.
A 15 × 15 room: 225 square feet, all of it square
Fifteen feet each way makes 225 sq ft. In a square this size the middle of the room is a long way from every wall, so furniture pushed to the edges leaves a dance floor in the center. A 9 × 12 ft rug with seating pulled onto it works better, and shows 3.0 ft of floor on two sides and 1.5 ft on the other two. The room is 21.2 ft across the diagonal.
Tile is tidy here because 15 ft is a whole number of 12 in tiles: 225 to cover it and 248 with the usual tenth for cuts and breakage. Plank flooring is 13 boxes. Some carpet lines are made in 15 ft widths, which would cover this floor without a seam, so it is worth asking; the quantity is about 40.0 sq yd. Wall paint for two coats is 2.45 gallons (2 gallons + 2 quarts).
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 15x15 room?
225 square feet (15 ft × 15 ft). That is 25.00 square yards or 20.90 square meters.
How many square feet of flooring do I need for a 15x15 room?
The floor is 225 sq ft, so buy about 248 sq ft with 10% for cuts and waste. That is 13 boxes at 20 sq ft a box.
How much carpet is a 15x15 room?
25.00 square yards of floor. Carpet comes off a 12 ft wide roll, so you buy whole strips: here 2 pieces 12 ft wide and 15 ft long, with a seam, which is 360 sq ft (40.0 sq yd) of carpet for a 225 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.