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) |
|---|---|
| 0.1 | 14.4 |
| 1 | 144 |
| 2 | 288 |
| 3 | 432 |
| 4 | 576 |
| 5 | 720 |
| 6 | 864 |
| 7 | 1,008 |
| 8 | 1,152 |
| 9 | 1,296 |
| Square Feet (ft2) | Square Inch (in2) |
|---|---|
| 10 | 1,440 |
| 20 | 2,880 |
| 30 | 4,320 |
| 40 | 5,760 |
| 50 | 7,200 |
| 60 | 8,640 |
| 70 | 10,080 |
| 80 | 11,520 |
| 90 | 12,960 |
| 100 | 14,400 |
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).
- sq-ft to sq-m (Square Feet to Square Meter)
- sq-ft to sq-cm (Square Feet to Square Centimeter)
- sq-ft to sq-km (Square Feet to Square Kilometer)
- sq-ft to hectare (Square Feet to Hectare)
- sq-ft to decare (Square Feet to Decare)
- sq-ft to are (Square Feet to Are)
- sq-ft to acre (Square Feet to Acre)
- sq-ft to pyeong (Square Feet to Pyeong)
- sq-ft to tsubo (Square Feet to Tsubo)
- sq-ft to sq-yard (Square Feet to Square Yard)
- sq-ft to sq-inch (Square Feet to Square Inch)
- sq-ft to sq-mile (Square Feet to Square Mile)