Room Sizes in Square Feet (10x10 to 20x20)
Find the room's width and length in the rows below to read its floor area in square feet and square yards and the length of its walls; every row is the length times the width, worked out exactly.
Estimates for planning, not professional advice. Read the full notice.
Work it out for your own sizes
Enter your own roomRoom sizes, width by length
Floor area in square feet and square yards, and the length of the walls, for each width and length in the grid
| Room | Area, square feet | Area, square yards | Perimeter, feet |
|---|---|---|---|
| 10 ft × 10 ft | 100 ft² | 11.11 yd² | 40 ft |
| 10 ft × 12 ft | 120 ft² | 13.33 yd² | 44 ft |
| 10 ft × 14 ft | 140 ft² | 15.56 yd² | 48 ft |
| 10 ft × 16 ft | 160 ft² | 17.78 yd² | 52 ft |
| 10 ft × 18 ft | 180 ft² | 20 yd² | 56 ft |
| 10 ft × 20 ft | 200 ft² | 22.22 yd² | 60 ft |
| 12 ft × 12 ft | 144 ft² | 16 yd² | 48 ft |
| 12 ft × 14 ft | 168 ft² | 18.67 yd² | 52 ft |
| 12 ft × 16 ft | 192 ft² | 21.33 yd² | 56 ft |
| 12 ft × 18 ft | 216 ft² | 24 yd² | 60 ft |
| 12 ft × 20 ft | 240 ft² | 26.67 yd² | 64 ft |
| 14 ft × 14 ft | 196 ft² | 21.78 yd² | 56 ft |
| 14 ft × 16 ft | 224 ft² | 24.89 yd² | 60 ft |
| 14 ft × 18 ft | 252 ft² | 28 yd² | 64 ft |
| 14 ft × 20 ft | 280 ft² | 31.11 yd² | 68 ft |
| 16 ft × 16 ft | 256 ft² | 28.44 yd² | 64 ft |
| 16 ft × 18 ft | 288 ft² | 32 yd² | 68 ft |
| 16 ft × 20 ft | 320 ft² | 35.56 yd² | 72 ft |
| 18 ft × 18 ft | 324 ft² | 36 yd² | 72 ft |
| 18 ft × 20 ft | 360 ft² | 40 yd² | 76 ft |
| 20 ft × 20 ft | 400 ft² | 44.44 yd² | 80 ft |
Estimate for planning, from what you entered and the product data shown. Check product labels and your supplier before you buy.
The perimeter is the length of the walls around one room. Every area is exact and is shown to two places at most.
A room of 12 ft × 12 ft has a floor area of 144 ft², which is 16 yd², and its walls add up to 48 ft.
Questions
How many square feet is a 12x12 room?
Multiply the two sides. The chart's row for that size shows the result, and the sentence after the table works it out.
How do I find the square feet of a room that is not in the chart?
Measure its length and width in feet, multiply them, and round once at the end. The calculator adds several rooms and reads feet and inches as typed.
Why is a room's area in square yards different from its area in square feet?
A square yard is three feet by three feet, so the number of square yards is the number of square feet divided by the count of square feet in one square yard.
What does the perimeter in the chart measure?
It is the length of the walls around the room, along the floor. It does not change when a cut-out takes floor away, and it is not used for the floor area.
Calculate it for your project
Enter your own sizes to get the amount to buy or the layout figures, with the working shown and a page to print.
Turn a size into a total