METRIC CONVERSION FACTORS 



ac - 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 



If - 28.3171 X 10'm' 



ha - 10.000 m'- 2.471 ac 



hm - 100 m -328.08 ft 



hm* - 1x10*m' 



l.gpm - 0.0758 Us 



in - 2.54 cm 



kg - 2.20462 lb - 1.1 X 10' tons 



km - 0.62137 miles 



km* - 0.3861 mf* 



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



Us m 0.035 cfs- 13.193 l.gpm = 15.848 U.S. gpm 



m - 3.2808 ftm^ = 1 0.7636 ft^ 



m* - 1,000 L- 35.3144 ft' -219.97 I. gal- 264.2 U.S. gal 



m'/8 - 35.314 cfs 



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' 



A6-2 



