Convert Square Kilometers to Square Miles

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

SWAP UNITS
Results in Square Miles:
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1 sq km = 0.386102 sq mi

How to Convert Square Kilometers to Square Miles

conversion scale showing square kilometers and equivalent square miles area values

To convert a square kilometer measurement to a square mile measurement, multiply the area by the conversion ratio. One square kilometer is equal to 0.386102 square miles, so use this simple formula to convert:

square miles = square kilometers × 0.386102

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

For example, here's how to convert 5 square kilometers to square miles using the formula above.
5 sq km = (5 × 0.386102) = 1.930511 sq mi

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

Square Kilometers

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

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 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.

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 Kilometer Measurements and Equivalent Square Mile Conversions

Common square kilometer values converted to the equivalent square mile value
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 Area Conversions

US Customary
Convert to Acres
1 sq km is equal to 247.105381 acres
Convert to Square Yards
1 sq km is equal to 1,195,990 square yards
Convert to Square Feet
1 sq km is equal to 10,763,910.4 square feet
Convert to Square Inches
1 sq km is equal to 1,550,003,100 square inches
SI Units
Convert to Square Meters
1 sq km is equal to 1,000,000 square meters
Convert to Square Centimeters
1 sq km is equal to 10,000,000,000 square centimeters
Convert to Square Millimeters
1 sq km is equal to 1,000,000,000,000 square millimeters
Other Metric Units
Convert to Hectares
1 sq km is equal to 100 hectares
Convert to Ares
1 sq km is equal to 10,000 ares