Multiply By To obtain cubic foot per second (ft3/s) 0.02832 cubic meter per second foot (ft) 0.3048 meter foot per foot (ft/ft) 1.000 meter per meter mile (mi) 1.609 kilometer square mile (mi2) 2.590 square kilometer Sea level: In this report, "sea level" refers to the National Geodetic Vertical Datum of 1929 (NGVD of 1929) a geodetic datum derived from a general adjustment of the first-order level nets of the United States and Canada, formerly called Sea Level Datum of 1929.