Square feet to square inches (ft2 to in2) area units conversion factor is 144. To find out how many square inches in square feet, as a formula, 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 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".