Convert Square Miles to Square Kilometers

Enter your square mile value in the form below to get the value calculated in square kilometers.

Results in Square Kilometers:
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1 sq mi = 2.589988 sq km

How to Convert Square Miles to Square Kilometers

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

Convert square miles to square kilometers with this simple formula:

square kilometers = square miles × 2.589988

Converting a square mile area measurement to a square kilometer measurement involves multiplying the area by the conversion ratio to find the result. One square mile is equal to 2.589988 square kilometers, so to convert simply multiply by 2.589988.

For example:
5 sq mi = (5 × 2.589988) = 12.949941 sq km

Learn more about finding the area of your space using our area calculator.

Square miles and square kilometers are both units used to measure area. Learn more about area and find more area measurement conversion calculators. Square miles are an imperial measurement and can be abbreviated as sq mi, for example 1 sq mi. Square kilometers are a metric measurement and can be abbreviated as sq km, for example 1 sq km. Learn more about the metric system, including the common unit prefixes and how to convert between metric units.

square miles and square kilometers are units used to measure area
Convert Square Kilometers to Square Miles

Square Mile Measurements and Equivalent Square Kilometer Conversions

Common square mile values converted to the equivalent square kilometer value
Square Miles Square Kilometers
1 sq mi 2.59 sq km
2 sq mi 5.18 sq km
3 sq mi 7.77 sq km
4 sq mi 10.36 sq km
5 sq mi 12.95 sq km
6 sq mi 15.54 sq km
7 sq mi 18.13 sq km
8 sq mi 20.72 sq km
9 sq mi 23.31 sq km
10 sq mi 25.9 sq km
11 sq mi 28.49 sq km
12 sq mi 31.08 sq km
13 sq mi 33.67 sq km
14 sq mi 36.26 sq km
15 sq mi 38.85 sq km
16 sq mi 41.44 sq km
17 sq mi 44.03 sq km
18 sq mi 46.62 sq km
19 sq mi 49.21 sq km
20 sq mi 51.8 sq km
21 sq mi 54.39 sq km
22 sq mi 56.98 sq km
23 sq mi 59.57 sq km
24 sq mi 62.16 sq km
25 sq mi 64.75 sq km
26 sq mi 67.34 sq km
27 sq mi 69.93 sq km
28 sq mi 72.52 sq km
29 sq mi 75.11 sq km
30 sq mi 77.7 sq km
31 sq mi 80.29 sq km
32 sq mi 82.88 sq km
33 sq mi 85.47 sq km
34 sq mi 88.06 sq km
35 sq mi 90.65 sq km
36 sq mi 93.24 sq km
37 sq mi 95.83 sq km
38 sq mi 98.42 sq km
39 sq mi 101.01 sq km
40 sq mi 103.6 sq km

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 Feet
1 sq mi is equal to 27,878,400 square feet
Convert to Square Inches
1 sq mi is equal to 4,014,489,599.5 square inches
SI Units
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
Are 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