ANNEX 5 

 METRIC CONVERSIONS 



ac = 4,047 m 3 = 0.04047 ha 



ac-ft = 1,233.5 m 3 = 1.2335 dam 3 



Cx = 1.8 Fx 



cm = 0.3937 in. 



cm 2 = 0.155 in 2 



dam 3 = 1,000 m 3 = 0.8107 ac-ft 



ft 3 = 28.3171 x 10-3m 3 



ha = 10,000 m 2 = 2.471 ac 



hm = 100 m = 328.08 ft 



hm 3 l x 106 m 3 



I.gpm = 0.0758 L/s 



in = 2.54 cm 



k 9 = 2.20462 lb = 1.1 x 10-3 tons 



km = 0.62137 miles 



km 2 = 0.3861 mi 2 



L = 0.3532 ft 3 = 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 ftm 2 = 10.7636 ft 2 



11,3 " 1.000 L = 35.3144 ft 3 = 219.97 I. gal = 264.2 U S 



gal 



m 3 /s = 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/m390 



A5 - 2 



