A square mile is a unit of area, not distance, so it doesn’t directly convert to miles. A square mile represents the area of a square where each side is one mile long. Therefore, a square mile covers an area of one mile by one mile, which equals 640 acres or approximately 2.59 square kilometers. It’s important to understand that while ‘mile’ is a measure of distance, ‘square mile’ measures area, making them different concepts.