Skip to content
UtilLab

Square Kilometer [km2] to Square Mile [mi2] Converter

Quick Reference

1 Square Kilometer (km2) = 0.3861017849 Square Mile (mi2)

1 Square Mile (mi2) = 2.589990617 Square Kilometer (km2)

How to Convert Square Kilometer to Square Mile

1 km2 = 0.3861017849 mi2
1 mi2 = 2.589990617 km2

To convert Square Kilometer to Square Mile, divide the value by 2.589990617 (equivalently, multiply by 0.3861017849). To convert Square Mile back to Square Kilometer, multiply by 2.589990617.

Example: convert 10 km2 to mi2:
10 km2 = 10 x 0.3861017849 = 3.861017849 mi2

↔ Convert Square Mile to Square Kilometer

Square Kilometer

Definition: A square kilometer (km²) is a unit of area equal to a square that is 1 kilometer on each side. It is a multiple of the square meter, the SI unit of area.

History/origin: The square kilometer is derived from the kilometer, which is part of the metric system established in France in the late 18th century. The metric system was designed to be a standardized and coherent system of measurement based on decimal multiples.

Current use: Square kilometers are used to measure large areas, such as the size of cities, countries, lakes, and other geographical features. It's a common unit in geography, cartography, and environmental studies.

Square Mile

Definition: A square mile (mi²) is a unit of area equal to the area of a square that is 1 mile on each side. It is commonly used in the United States and other countries that use the imperial system.

History/origin: The square mile is derived from the mile, which has ancient origins and was traditionally based on the distance a Roman legion could march in a certain amount of time.

Current use: Square miles are used to measure very large areas, such as the size of cities, counties, and regions. It's a common unit in geography, cartography, and environmental studies in the US.

Square Kilometer to Square Mile Conversion Table

Square Kilometer [km2]Square Mile [mi2]
1 km20.3861017849 mi2
2 km20.7722035698 mi2
5 km21.930508924 mi2
10 km23.861017849 mi2
20 km27.722035698 mi2
50 km219.30508924 mi2
100 km238.61017849 mi2
200 km277.22035698 mi2
500 km2193.0508924 mi2
1000 km2386.1017849 mi2

Common Square Kilometer to Square Mile conversions

Common pairs of Area

Square Kilometer [km2] to Square Mile [mi2] Converter

What is 1 km2 in mi2?
1 Square Kilometer (km2) equals 0.3861017849 mi2, and 1 mi2 equals 2.589991 km2.
How do I convert Square Kilometer to Square Mile?
Divide by 2.589991: 10 km2 ÷ 2.589991 = 3.861018 mi2. The converter above does it for any value, with the precision you choose.
What is 100 km2 in mi2?
100 km2 = 38.610178 mi2. Common amounts are listed on this page, each with its own step-by-step page.
Is a Square Kilometer bigger than a Square Mile?
No. 1 km2 is only 0.3861017849 mi2: it takes 2.589991 km2 to make 1 mi2.
Square Kilometer to Square Mile Converter | UtilLab