Convert Square Inches to Square Feet

Enter the area in square inches below to get the value converted to square feet.

SWAP UNITS
Results in Square Feet:
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1 sq in = 0.006944 sq ft

How to Convert Square Inches to Square Feet

conversion scale showing square inches and equivalent square feet area values

To convert a square inch measurement to a square foot measurement, multiply the area by the conversion ratio. One square inch is equal to 0.006944 square feet, so use this simple formula to convert:

square feet = square inches × 0.006944

The area in square feet is equal to the square inches multiplied by 0.006944.

For example, here's how to convert 5 square inches to square feet using the formula above.
5 sq in = (5 × 0.006944) = 0.034722 sq ft

Square inches and square feet are both units used to measure area. Keep reading to learn more about each unit of measure.

Square Inches

One square inch is equal to the area of a square with sides that are 1 inch in length.

The square inch is a US customary and imperial unit of area. A square inch is sometimes also referred to as a square in. Square inches can be abbreviated as sq in, and are also sometimes abbreviated as in². For example, 1 square inch can be written as 1 sq in or 1 in².

Square Feet

One square foot is equal to the area of a square with sides that are 1 foot in length. One square foot is roughly equal to 144 square inches.

The square foot is a US customary and imperial unit of area. A square foot is sometimes also referred to as a square ft. Square feet can be abbreviated as sq ft, and are also sometimes abbreviated as ft². For example, 1 square foot can be written as 1 sq ft or 1 ft².

Try our square footage calculator to calculate the area of a space.

Square Inch Measurements and Equivalent Square Foot Conversions

Common square inch values converted to the equivalent square foot value
Square Inches Square Feet
1 sq in 0.006944 sq ft
2 sq in 0.013889 sq ft
3 sq in 0.020833 sq ft
4 sq in 0.027778 sq ft
5 sq in 0.034722 sq ft
6 sq in 0.041667 sq ft
7 sq in 0.048611 sq ft
8 sq in 0.055556 sq ft
9 sq in 0.0625 sq ft
10 sq in 0.069444 sq ft
11 sq in 0.076389 sq ft
12 sq in 0.083333 sq ft
13 sq in 0.090278 sq ft
14 sq in 0.097222 sq ft
15 sq in 0.104167 sq ft
16 sq in 0.111111 sq ft
17 sq in 0.118056 sq ft
18 sq in 0.125 sq ft
19 sq in 0.131944 sq ft
20 sq in 0.138889 sq ft
21 sq in 0.145833 sq ft
22 sq in 0.152778 sq ft
23 sq in 0.159722 sq ft
24 sq in 0.166667 sq ft
25 sq in 0.173611 sq ft
26 sq in 0.180556 sq ft
27 sq in 0.1875 sq ft
28 sq in 0.194444 sq ft
29 sq in 0.201389 sq ft
30 sq in 0.208333 sq ft
31 sq in 0.215278 sq ft
32 sq in 0.222222 sq ft
33 sq in 0.229167 sq ft
34 sq in 0.236111 sq ft
35 sq in 0.243056 sq ft
36 sq in 0.25 sq ft
37 sq in 0.256944 sq ft
38 sq in 0.263889 sq ft
39 sq in 0.270833 sq ft
40 sq in 0.277778 sq ft

More Square Inch Area Conversions

US Customary
Convert to Square Miles
1 sq in is equal to 2.491E-10 square miles
Convert to Acres
1 sq in is equal to 1.5942E-7 acres
Convert to Square Yards
1 sq in is equal to 0.000772 square yards
SI Units
Convert to Square Kilometers
1 sq in is equal to 6.4516E-10 square kilometers
Convert to Square Meters
1 sq in is equal to 0.000645 square meters
Convert to Square Centimeters
1 sq in is equal to 6.4516 square centimeters
Convert to Square Millimeters
1 sq in is equal to 645.16 square millimeters
Other Metric Units
Convert to Hectares
1 sq in is equal to 6.4516E-8 hectares
Convert to Ares
1 sq in is equal to 6.4516E-6 ares