How to use the Square Footage Calculator tool
3 simple steps · under a minute
-
Pick the shape
Choose rectangle, triangle or circle, and the unit you measured in.
-
Enter the measurements
Type the length and width, or the diameter for a circle.
-
See the area and cost
Read square feet, square yards and square meters, plus the cost if you add a price.
About Square footage calculator
Square footage is the area of a space in square feet. You need it to buy flooring, carpet, tile, paint, sod or to compare home sizes. For a rectangular room, multiply the length by the width: a 14 ft × 12 ft room is 168 square feet. This square footage calculator does the maths for rectangles, triangles and circles.
For an L-shaped or irregular room, split it into rectangles, work out each area and add them up. Always buy 5–10% more material than the exact area to allow for cuts and waste.
Any unit in
Measure in feet, inches, yards or meters; the result is always in square feet.
Three shapes
Rectangles, triangles and circles — split odd rooms into simple shapes and add them up.
Project cost
Add a price per square foot for flooring, carpet, paint or sod.
Frequently asked questions
How do I calculate square footage?
Multiply length by width in feet. A room 14 feet long and 12 feet wide is 14 × 12 = 168 sq ft.
How do I convert square feet to square yards?
Divide by 9. 168 sq ft is 18.67 sq yd.
How do I measure an L-shaped room?
Divide it into two rectangles, calculate each one and add the two areas.
How do I convert square meters to square feet?
Multiply by 10.764. One square meter is about 10.76 square feet.
How much extra flooring should I buy?
Usually 5–10% extra, or up to 15% for diagonal or patterned layouts.