Square foot to Square inch Converter
Type a value — the answer appears instantly. 1 ft² = 144 in².
Reviewed by the OmniCalc teamMethod verified 2026-07-01
144 square inches
= 0.092903 m²= 0.0000229568 ac
equals 144 square inchesFormula: in² = ft² × 144
Square foot to Square inch formula
in² = ft² × 144
Convert 5 square feet to square inches
- Start with 5 square feet.
- Multiply by the conversion factor: 5 × 144 = 720.
- So 5 ft² = 720 in².
Square foot to Square inch conversion table
| Square feet (ft²) | Square inches (in²) |
|---|---|
| 0.01 ft² | 1.44 in² |
| 0.1 ft² | 14.4 in² |
| 0.25 ft² | 36 in² |
| 0.5 ft² | 72 in² |
| 1 ft² | 144 in² |
| 2 ft² | 288 in² |
| 3 ft² | 432 in² |
| 4 ft² | 576 in² |
| 5 ft² | 720 in² |
| 6 ft² | 864 in² |
| 7 ft² | 1,008 in² |
| 8 ft² | 1,152 in² |
| 9 ft² | 1,296 in² |
| 10 ft² | 1,440 in² |
| 15 ft² | 2,160 in² |
| 20 ft² | 2,880 in² |
| 25 ft² | 3,600 in² |
| 30 ft² | 4,320 in² |
| 40 ft² | 5,760 in² |
| 50 ft² | 7,200 in² |
| 75 ft² | 10,800 in² |
| 100 ft² | 14,400 in² |
| 250 ft² | 36,000 in² |
| 500 ft² | 72,000 in² |
| 1,000 ft² | 144,000 in² |
| 5,000 ft² | 720,000 in² |
| 10,000 ft² | 1,440,000 in² |
Unit definitions
What is a square foot?
The square foot is the area of a one-foot square, exactly 0.09290304 square metres. It is the dominant unit for real estate, floor plans, and rent in the United States. One square metre is about 10.76 square feet.
What is a square inch?
The square inch is the area of a one-inch square, exactly 6.4516 square centimetres. It is used in the United States for pressures (pounds per square inch), print, and small surfaces. There are 144 square inches in a square foot.
Frequently asked questions
How many square inches are in one square foot?
One square foot equals 144 square inches (1 ft² = 144 in²).
How do I convert square feet to square inches?
Multiply the value in square feet by 144. For example, 10 ft² × 144 = 1,440 in².
Which is bigger — a square foot or a square inch?
A square foot is bigger: one square foot contains 144 square inches.
Is this square foot to square inch converter free?
Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.
Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.