Convert Square Miles to Square Feet

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

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Results in Square Feet:
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1 sq mi = 27,878,399.996383 sq ft

How to Convert Square Miles to Square Feet

Calculators can be used to convert measurements from one unit to another

To convert a square mile measurement to a square foot measurement, multiply the area by the conversion ratio. One square mile is equal to 27,878,399.996383 square feet, so use this simple formula to convert:

square feet = square miles × 27,878,399.996383

The area in square feet is equal to the square miles multiplied by 27,878,399.996383.

For example, here's how to convert 5 square miles to square feet using the formula above.
5 sq mi = (5 × 27,878,399.996383) = 139,391,999.98192 sq ft

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

Square Miles

One square mile is equal to the area of a square with sides that are 1 mile long. One square mile is roughly equal to 2.59 square kilometers.

The square mile is a US customary and imperial unit of area. Square miles can be abbreviated as sq mi, and are also sometimes abbreviated as mi². For example, 1 square mile can be written as 1 sq mi or 1 mi².

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 Mile Measurements and Equivalent Square Foot Conversions

Common square mile values converted to the equivalent square foot value
Square Miles Square Feet
1 sq mi 27,878,400 sq ft
2 sq mi 55,756,800 sq ft
3 sq mi 83,635,200 sq ft
4 sq mi 111,513,600 sq ft
5 sq mi 139,392,000 sq ft
6 sq mi 167,270,400 sq ft
7 sq mi 195,148,800 sq ft
8 sq mi 223,027,200 sq ft
9 sq mi 250,905,600 sq ft
10 sq mi 278,784,000 sq ft
11 sq mi 306,662,400 sq ft
12 sq mi 334,540,800 sq ft
13 sq mi 362,419,200 sq ft
14 sq mi 390,297,600 sq ft
15 sq mi 418,176,000 sq ft
16 sq mi 446,054,400 sq ft
17 sq mi 473,932,800 sq ft
18 sq mi 501,811,200 sq ft
19 sq mi 529,689,600 sq ft
20 sq mi 557,568,000 sq ft
21 sq mi 585,446,400 sq ft
22 sq mi 613,324,800 sq ft
23 sq mi 641,203,200 sq ft
24 sq mi 669,081,600 sq ft
25 sq mi 696,960,000 sq ft
26 sq mi 724,838,400 sq ft
27 sq mi 752,716,800 sq ft
28 sq mi 780,595,200 sq ft
29 sq mi 808,473,600 sq ft
30 sq mi 836,352,000 sq ft
31 sq mi 864,230,400 sq ft
32 sq mi 892,108,800 sq ft
33 sq mi 919,987,200 sq ft
34 sq mi 947,865,600 sq ft
35 sq mi 975,744,000 sq ft
36 sq mi 1,003,622,400 sq ft
37 sq mi 1,031,500,800 sq ft
38 sq mi 1,059,379,200 sq ft
39 sq mi 1,087,257,600 sq ft
40 sq mi 1,115,136,000 sq ft

More Square Mile Area Conversions

US Customary
Convert to Acres
1 sq mi is equal to 640 acres
Convert to Square Yards
1 sq mi is equal to 3,097,600 square yards
Convert to Square Inches
1 sq mi is equal to 4,014,489,599.5 square inches
SI Units
Convert to Square Kilometers
1 sq mi is equal to 2.589988 square kilometers
Convert to Square Meters
1 sq mi is equal to 2,589,988.1 square meters
Convert to Square Centimeters
1 sq mi is equal to 25,899,881,100 square centimeters
Convert to Square Millimeters
1 sq mi is equal to 2,589,988,110,000 square millimeters
Other Metric Units
Convert to Hectares
1 sq mi is equal to 258.998811 hectares
Convert to Ares
1 sq mi is equal to 25,899.9 ares