To convert square miles to square kilometers, you can use the conversion factor of 1 square mile = 2.58999 square kilometers. Here are the step-by-step instructions to perform the conversion:

Step 1: Write down the given value in square miles. Let’s say we have X square miles.

Step 2: Multiply the value in square miles by the conversion factor of 2.58999 square kilometers per square mile. This will give you the equivalent value in square kilometers.

Equivalent value in square kilometers = X square miles × 2.58999 square kilometers/square mile

Step 3: Perform the multiplication to find the equivalent value in square kilometers.

Example:

Let’s convert 5 square miles to square kilometers using the above steps.

Step 1: Given value = 5 square miles

Step 2: Multiply 5 square miles by 2.58999 square kilometers/square mile.

Equivalent value in square kilometers = 5 square miles × 2.58999 square kilometers/square mile

Step 3: Perform the multiplication.

Equivalent value in square kilometers = 12.94995 square kilometers

Therefore, 5 square miles is equal to 12.94995 square kilometers.