1600 cm. The formula for calculating the perimeter of a square is the side length multiplied by 4, and a square with a length of two meters and a width of two meters is 16 meters, which translates into a perimeter of 1600 cm. A square is a special parallelogram, that is, a group of parallelograms with equal adjacent sides and a right angle is called a square, also called a regular quadrilateral.