Square Footage Calculator

How do I calculate square footage?

Sections
ft
ft
ft
ft
ft
ft

Your area measures

240square feet

Split any L-shaped space into rectangles and set the number of sections to match.

AA 20 × 12240 sq ft
Section A240 sq ft
Square yards26.7
Acres0.006

Add up to three rectangular sections to get a total. L-shaped rooms and yards are easiest as two or three rectangles.

How it works

Each section is length × width in feet. The sections are added together, and the total is converted to square yards and acres.

Before you order

  • Round to the nearest inch while you measure, then convert to decimals.
  • For quotes on flooring or sod, ask whether the seller adds waste or you do.
  • Sketch the space first and label each rectangle before you start measuring.

Common questions

How do I find the square footage of an L-shaped room?

Split the L into two rectangles, measure each and add the areas.

How many square feet are in a square yard?

Nine, because a yard is 3 feet and 3 × 3 is 9.