Square Foot
A square foot is a unit of area equal to a square that measures one foot on each side. It is abbreviated sq ft or ft². One square foot equals 144 square inches, or exactly 0.09290304 square meters.
The square foot is the standard unit for building and room sizes in the United States, and it is also used in Canada, the United Kingdom and a few other countries alongside metric units. Nine square feet make one square yard, and 43,560 square feet make one acre.
One square meter is about 10.764 square feet, so a 1,000 sq ft apartment is roughly 93 square meters.
For a rectangle, square feet is length times width in feet: a 12 by 15 foot room is 180 sq ft. Irregular rooms are split into rectangles and added together. See how to measure square footage for worked examples.
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