Square feet to square inches (ft2 to in2) area units conversion factor is 144. To find out how many square inches in square feet, multiply the square foot value by 144 or use the converter.
1 Sq. Foot = 144 Sq. Inch
There are 144 square inches in a square foot, because as a formula one foot equals to 12 inches and the area of a square is calculated by multiplying a side by itself, that makes 12 * 12 = 144 sq. inches in a sq. foot.
For example, to find out how many sq. inches there are in a sq. foot and a half, as a formula to convert from sq. feet to sq. inches, multiply the sq. foot value by 144, that makes 1.5 ft2 * 144 = 216 sq. inches in 1.5 sq. feet.
Square foot and square inch are imperial and US customary area measurement units and there are 144 sq. inches in a sq. foot. The abbreviations are "in2" and "ft2".