There is no way to convert square meters to meters because they don't measure the same thing. Meters are used to measure length and square meters are used to measure area.
Perhaps if you could provide a more detailed idea of what you are trying to accomplish we could get further with your question. For example, if you are given the area of a circle as 12.56 square meters then you can find its radius is 2 meters, but this is due to the shape. To contrast, consider that a square with area 12.56 square meters has a side length of about 3.54 meters and a perimeter of 14.18 meters.
Stephen La Rocque.>