Square miles to square kilometers area units conversion factor is 2.58998811. To find out how many square kilometers in square miles, multiply the square mile value by 2.58998811.
1 Square Mile = 2.58998811 Square Kilometers
There are about 2.59 square kilometers in a square mile, because one mile is 1.60934 kilometers and the area of a square is calculated by multiplying a side by itself, that makes 1.60934 * 1.60934 = 2.59 square kilometers in a square mile.
For example, to find out how many sq. kilometers there are in a square mile and a half, as a formula to convert from sq. mile to sq. kilometers, multiply the sq. mile value by 2.59, that makes 1.5 mi2 * 2.59 = 3.885 sq. kilometers in 1.5 sq. mile.
Square mile is an imperial and US Customary area unit and defined as the area of a square with sides 1 mile in length. 1 square mile is equal to 2.58998811 square kilometers. The abbreviation is "mi2".
Square kilometer (kilometre) is a metric system area unit and defined as the area of a square with sides 1 kilometer in length. 1 square kilometer is equal to 0.386102159 square mile. The abbreviation is "km2".