Convert Square feet to square inches

1 square foot = 144 square inches · in² = ft² × 144

ft²
Square inches
144in²

1 square foot = 144 square inches

When you need this conversion

This conversion goes from square feet, the standard US unit for property and flooring, to square inches, used for small US area measurements. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.

Square feet to square inches conversion table

Conversion table from square feet to square inches
Square feet (ft²)Square inches (in²)
1 ft²144 in²
2 ft²288 in²
3 ft²432 in²
5 ft²720 in²
10 ft²1,440 in²
15 ft²2,160 in²
20 ft²2,880 in²
25 ft²3,600 in²
50 ft²7,200 in²
75 ft²10,800 in²
100 ft²14,400 in²
250 ft²36,000 in²
500 ft²72,000 in²
1,000 ft²144,000 in²

The formula

in² = ft² × 144

Because both units measure area, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.

Convert the other way

Square inches to square feet →

Related area conversions

All area conversions →

Frequently asked questions

How many square inches are in a square foot?
There are 144 square inches in 1 square foot. The formula is in² = ft² × 144.
How do you convert square feet to square inches?
Use the formula in² = ft² × 144. For example, 10 square feet equals 1,440 square inches.
Is the square feet to square inches conversion exact?
Yes. Square feet and square inches are both units of area, related by an exact defined factor. Displayed results are rounded for readability.
What is ft² short for?
ft² is the standard symbol for square foot (also written as sq ft). in² is the symbol for square inch.