CONVERSION FACTORS 



^c = 4,047 m' = 0.04047 ha 



ac-ft = 1,233.5 m^ = 1.2335 dam' 



C° = 5/9(F°-32) 



cm = 0.3937 in. 



cm^ = 0.155 in' 



dam' = 1,000 m' = 0.8107 ac-ft 



ft3 = 28.3171 X 10" V 



ha = 10,000 m' = 2.471 ac 



hm = 100 m = 328.08 ft 



W = IxlO'm' 



I.gpm = 0.0758 L/s 



in = 2.54 cm 



jjg = 2 .20462 lb = 1 . 1 X 1 0' tons 



Ion = 0.62137 miles 



km^ = 0.3861 mi' 



L = 0.3532 ft' = 0.21997 I. gal = 0.26420 U.S. gal 



L/s = 0.035 cfs = 13.193 I.gpm = 15.848 U.S. gpm 



m = 3.2808 ft 



m^ = 10.765 ft' 



^3 = 1,000 L = 35.3144 ft' = 219.97 I. gal= 264.2 U.S. gal 



m^/s = 35.314 ft'/s 



mm = 0.00328 ft 



tonne = 1,000 kg = 1.1023 ton (short) 



U.S. gpm = 0.0631 L/s 



For Air Samples 



ppm = 100 pphm = 1000 x (Molecular Weight of substance/24.45) mg/m' 



A4-2 



