Square Kilometers to Square Miles Converter

Enter the area in square kilometers below to convert it to square miles.

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Result in Square Miles:

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1 sq km = 0.386102 sq mi

Do you want to convert square miles to square kilometers?

How to Convert Square Kilometers to Square Miles

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Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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To convert a measurement in square kilometers to a measurement in square miles, multiply the area by the following conversion ratio: 0.386102 square miles/square kilometer.

Since one square kilometer is equal to 0.386102 square miles, you can use this simple formula to convert:

square miles = square kilometers × 0.386102

The area in square miles is equal to the area in square kilometers multiplied by 0.386102.

For example, here's how to convert 5 square kilometers to square miles using the formula above.
square miles = (5 sq km × 0.386102) = 1.930511 sq mi
conversion scale showing square kilometers and equivalent square miles area values

How Many Square Miles Are in a Square Kilometer?

There are 0.386102 square miles in a square kilometer, which is why we use this value in the formula above.

1 sq km = 0.386102 sq mi

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

What Is a Square Kilometer?

One square kilometer is equivalent to the area of a square with sides that are each 1 kilometer in length. One square kilometer is equal to 0.386102 square miles or 1,000,000 square meters.

The square kilometer, or square kilometre, is a multiple of the square meter, which is the SI derived unit for area. In the metric system, "kilo" is the prefix for thousands, or 103. A square kilometer is sometimes also referred to as a square km. Square kilometers can be abbreviated as sq km, and are also sometimes abbreviated as km². For example, 1 square kilometer can be written as 1 sq km or 1 km².

Learn more about square kilometers.

What Is a Square Mile?

One square mile is equal to the area of a square with sides that are each 1 mile long. One square mile is roughly equal to 2.59 square kilometers or 640 acres.

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.

Learn more about square miles.

Square Kilometer to Square Mile Conversion Table

Table showing various square kilometer measurements converted to square miles.
Square Kilometers Square Miles
1 sq km 0.386102 sq mi
2 sq km 0.772204 sq mi
3 sq km 1.1583 sq mi
4 sq km 1.5444 sq mi
5 sq km 1.9305 sq mi
6 sq km 2.3166 sq mi
7 sq km 2.7027 sq mi
8 sq km 3.0888 sq mi
9 sq km 3.4749 sq mi
10 sq km 3.861 sq mi
11 sq km 4.2471 sq mi
12 sq km 4.6332 sq mi
13 sq km 5.0193 sq mi
14 sq km 5.4054 sq mi
15 sq km 5.7915 sq mi
16 sq km 6.1776 sq mi
17 sq km 6.5637 sq mi
18 sq km 6.9498 sq mi
19 sq km 7.3359 sq mi
20 sq km 7.722 sq mi
21 sq km 8.1081 sq mi
22 sq km 8.4942 sq mi
23 sq km 8.8804 sq mi
24 sq km 9.2665 sq mi
25 sq km 9.6526 sq mi
26 sq km 10.04 sq mi
27 sq km 10.42 sq mi
28 sq km 10.81 sq mi
29 sq km 11.2 sq mi
30 sq km 11.58 sq mi
31 sq km 11.97 sq mi
32 sq km 12.36 sq mi
33 sq km 12.74 sq mi
34 sq km 13.13 sq mi
35 sq km 13.51 sq mi
36 sq km 13.9 sq mi
37 sq km 14.29 sq mi
38 sq km 14.67 sq mi
39 sq km 15.06 sq mi
40 sq km 15.44 sq mi

More Square Kilometer & Square Mile Conversions