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Estimated Use of Water in the United States in 1990
Conversion Factors

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                   Multiply            By              To Obtain
--------------------------------   -----------  ---------------------------------
                                       Area
                            acre      43,560    square foot 
                                       4,047    square meter
                                    0.001562    square mile 
                                       Flow
          gallon per day (gal/d)       3.785    liter per day
million gallons per day (Mgal/d)       1.121    thousand acre-feet per year
                                    0.001547    thousand cubic feet per second
                                      0.6944    thousand gallons per minute
                                    0.003785    million cubic meters per day
                                      1.3815    million cubic meters per year
     thousand acre-feet per year      0.8921    million gallons per day
                                    0.001380    thousand cubic feet per second
                                      0.6195    housand gallons per minute
                                    0.003377    million cubic meters per day

Some water relations in inch-pounds units are listed below:

(Approximations)

1 gallon = 8.34 pounds 1 million gallons = 3.07 acre-feet 1 cubic foot = 62.4 pounds = 7.48 gallons 1 acre-foot (acre-ft) = 325,851 gallons = 43,560 cubic feet 1 inch of rain = 17.4 million gallons per sqare mile = 27,200 gallons per acre = 100 tons per acre


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Last modified: 4/10/96