The short answer
A 20 × 15 ft rectangle is 300 square feet (33.33 square yards, 27.87 m²). Cut out an 8 × 6 ft notch and an L-shaped room is 252 square feet. Divide square feet by 9 for square yards.
How to measure an odd-shaped room
Split it into rectangles, measure each one, and add them. Or measure the outer rectangle and subtract the missing corner (the L-shape option). Switch an area to Subtract to cut out a hole, such as a closet or a kitchen island. Pick feet, inches, yards or meters for each area.
Conversions
| From | To | Multiply by |
|---|---|---|
| square feet | square yards | 1 ÷ 9 (0.1111) |
| square feet | square meters | 0.09290304 |
| square yards | square feet | 9 |
| square meters | square feet | 10.7639 |
When you are done, use the “Paint these walls” button to carry the room size into the paint calculator.
FAQ
How do I calculate square footage?
Multiply length by width, both in feet. A 20 × 15 ft room is 300 sq ft. For other shapes, split them into rectangles, triangles and circles and add the areas.
How do I calculate the square footage of an L-shaped room?
Multiply the outer length by the outer width, then subtract the missing corner. 20 × 15 minus 8 × 6 is 300 − 48 = 252 sq ft.
How many square feet are in a square yard?
Nine. 1 yd × 1 yd = 3 ft × 3 ft = 9 sq ft.
How do I convert square feet to square meters?
Multiply by 0.09290304. 300 sq ft is about 27.87 m².