How to use it
Pick a shape and unit
Choose Rectangle, Circle, Triangle or Multiple rooms, and measure in feet or meters.
Enter your measurements
Type the dimensions. The area updates instantly in sq ft, sq m, sq yd and acres.
Estimate cost
Optionally add a price per square foot to see the total cost for flooring, paint or turf.
Worked example
A standard bedroom that measures 12 ft long by 10 ft wide has an area of 12 × 10 = 120 sq ft (about 11.15 sq m, or 13.33 sq yd). If flooring costs $4.50 per sq ft, covering that room costs 120 × 4.50 = $540. For an L-shaped room, split it into two rectangles with the Multiple rooms mode and the calculator adds them together for you.
Common room sizes
| Room | Typical size | Sq ft | Sq m |
|---|---|---|---|
| Small bedroom | 10 × 10 ft | 100 | 9.3 |
| Standard bedroom | 12 × 10 ft | 120 | 11.1 |
| Kitchen | 12 × 12 ft | 144 | 13.4 |
| Master bedroom | 14 × 16 ft | 224 | 20.8 |
| Living room | 16 × 20 ft | 320 | 29.7 |
| Two-car garage | 20 × 20 ft | 400 | 37.2 |
Questions
How many square feet in a square yard?
There are 9 square feet in a square yard (a yard is 3 feet, and 3 × 3 = 9). To convert square feet to square yards, divide by 9 — this calculator shows the sq yd figure automatically.
How do I measure an L-shaped room?
Split the L into two rectangles, measure each one, and add the areas together. Use the Multiple rooms mode here: enter each rectangle as its own row and the calculator sums them for you. Blank rows are ignored.
How do I convert square feet to square meters?
Multiply square feet by 0.0929 (more precisely 0.092903) to get square meters. For example, 120 sq ft × 0.0929 ≈ 11.15 sq m. The result panel shows this conversion for every calculation.
Is anything uploaded?
No. All calculations run entirely in your browser — nothing is uploaded, and the tool is free with no sign-up.