12x18 in square feet, square yards and square meters
A living and dining room, or a primary bedroom with a sitting area is about this size. The area is length times width: 12 × 18 = 216 sq ft. Measure to the walls at the longest point, and add closets and alcoves you will floor.
| Unit | This room |
|---|---|
| Square feet | 216 sq ft |
| Square yards | 24.00 sq yd |
| Square meters | 20.07 sq m |
| Perimeter (around the walls) | 60 ft |
| Acres | 0.00496 acres |
What to buy for 216 sq ft
| Material | Amount |
|---|---|
| Flooring (10% waste, 20 sq ft boxes) | 238 sq ft, 12 boxes |
| Carpet off a 12 ft roll (before trimming) | 24.0 sq yd, one piece |
| 12 × 12 in tiles (10% waste) | 238 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 | 227 sq ft | 12 |
| 10% waste | 238 sq ft | 12 |
| 15% waste | 248 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 12 × 18 room: two zones in 216 square feet
Twelve by eighteen is 216 sq ft with a 2 to 3 proportion, long enough to split in two. A living area on a 9 × 12 ft rug takes one end, with 1.5 ft of floor either side of it, and the remaining length suits a dining table, a desk wall or a play corner. As a primary bedroom it leaves room for a sitting area at the foot of the bed. The diagonal runs 21.6 ft.
A room this long often has more than one door and several windows, so treat the paint figure as a starting point: 429 sq ft after one door and two windows, 2.45 gallons for two coats, 2 gallons + 2 quarts to buy. Flooring is 12 boxes. If you carpet it, the 12 ft roll width matches the room, so it is one 18 ft cut and about 24.0 sq yd.
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 12x18 room?
216 square feet (12 ft × 18 ft). That is 24.00 square yards or 20.07 square meters.
How many square feet of flooring do I need for a 12x18 room?
The floor is 216 sq ft, so buy about 238 sq ft with 10% for cuts and waste. That is 12 boxes at 20 sq ft a box.
How much carpet is a 12x18 room?
24.00 square yards of floor. Carpet comes off a 12 ft wide roll, so you buy whole strips: here one 12 ft wide piece 18 ft long, which is 216 sq ft (24.0 sq yd) of carpet for a 216 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.