ft2
in2

How to convert square feet to square inches

1 square foot is equal to 144 square inches:

1 ft2 = 144 in2

When an area A in square feet is multiplied by 144, it gives area in square inches.

Ain2 = Aft2 × 144


Example

To convert 30 square feet into square inches, it is multiplied by 144:

(30 ft2) × 144 = 4320 in2

Square feet

The square foot (plural square feet) is an imperial unit and U.S. customary unit of area. It is defined as the area of a square with sides of 1 foot. It is abbreviated sq. ft, sf, or ft2. It is also denoted by '2.

Square inches

The square inch (plural square inches) is a unit of area. It is defined as the area of a square with sides of 1 inch. It is abbreviated sq. in, inch2, or in2.

Quick Conversion Table

The quick square foot to square inch conversion table is given below:

Square feetSquare inches
10 ft21440 in2
20 ft22880 in2
30 ft24320 in2
36 ft25184 in2
40 ft25760 in2
50 ft27200 in2
60 ft28640 in2
70 ft210080 in2
80 ft211520 in2
90 ft212960 in2
100 ft214400 in2