How many sq mi in 1 sq km?
The answer is 0.38610215854245.

We assume you are converting between **square mile** and **square kilometre**.

You can view more details on each measurement unit:

sq mi or
sq km

The SI derived unit for **area** is the square meter.

1 square meter is equal to 3.8610215854245E-7 sq mi, or 1.0E-6 sq km.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between square miles and square kilometers.

Type in your own numbers in the form to convert the units!

You can do the reverse unit conversion from sq km to sq mi, or enter any two units below:

A square mile is defined as the area of a square with sides one mile in length.

The definition of a mile is as follows:

A mile is any of several units of distance, or, in physics terminology, of length. Today, one mile is mainly equal to about 1609 m on land and 1852 m at sea and in the air, but see below for the details. The abbreviation for mile is 'mi'. There are more specific definitions of 'mile' such as the metric mile, statute mile, nautical mile, and survey mile. On this site, we assume that if you only specify 'mile' you want the statute mile.

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