How many square inches are in one ft² (square feet)?

There are 144 square inches in one ft² (square feet).

Detailed answer

Each ft² (square feet) is the area of a square 12 inches by 12 inches, so 12 × 12 = 144 in². This ratio is exact in the imperial system.

Relationship context

Square inches and square feet are the same US customary / imperial family. Small areas and material sizes often use square inches; rooms use square feet.

Quick conversion table

Square Feet (ft2)Square Inch (in2)
0.114.4
1144
2288
3432
4576
5720
6864
71,008
81,152
91,296
Square Feet (ft2)Square Inch (in2)
101,440
202,880
304,320
405,760
507,200
608,640
7010,080
8011,520
9012,960
10014,400

More Square Feet converters

Dedicated pages from Square Feet to every other common area unit (square meter, square kilometer, hectare, acre, square feet, square yard, square inch, square mile).