result rounded Decimal places Result in Plain English 6,400 square meters is equal to about 1.58 acres. In Scientific Notation 6,400 square meters = 6.4 x 10 3 square meters ≈ 1.58147 x 10 0 acres Square Meters A square meter, or square metre, is a unit of area. It is the size of a square that is one meter on a side. VXRfH.