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

Quick Reference

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

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

How to Convert Square Mile to Square Kilometer

1 mi2 = 2.589990617 km2
1 km2 = 0.3861017849 mi2

To convert Square Mile to Square Kilometer, multiply the value by 2.589990617. To convert Square Kilometer back to Square Mile, divide by 2.589990617.

Example: convert 10 mi2 to km2:
10 mi2 = 10 x 2.589990617 = 25.89990617 km2

↔ Convert Square Kilometer to Square Mile

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

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 to Square Kilometer Conversion Table

Square Mile [mi2]Square Kilometer [km2]
1 mi22.589990617 km2
2 mi25.179981234 km2
5 mi212.94995308 km2
10 mi225.89990617 km2
20 mi251.79981234 km2
50 mi2129.4995308 km2
100 mi2258.9990617 km2
200 mi2517.9981234 km2
500 mi21294.995308 km2
1000 mi22589.990617 km2

Common Square Mile to Square Kilometer conversions

Common pairs of Area

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

What is 1 mi2 in km2?
1 Square Mile (mi2) equals 2.589991 km2, and 1 km2 equals 0.3861017849 mi2.
How do I convert Square Mile to Square Kilometer?
Multiply by 2.589991: 10 mi2 × 2.589991 = 25.899906 km2. The converter above does it for any value, with the precision you choose.
What is 100 mi2 in km2?
100 mi2 = 258.999062 km2. Common amounts are listed on this page, each with its own step-by-step page.
Is a Square Mile bigger than a Square Kilometer?
Yes. 1 mi2 = 2.589991 km2, so the same quantity becomes a larger number when written in km2.
Square Mile to Square Kilometer Converter | UtilLab