Water Conversion Table
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1
2Form No. 615 R03/2012
WATER CONVERSION TABLE
GPM = Gallons per minute
CFS = Cubic feet per second
AF = Acre-feet
1 Cubic foot of water equals ............................................................ 7.48
Gallons
1 AF of water equals ..............................................................................
1 foot of water on 1 acre
.................................................................................................. 325,851
Gallons
.................................................................................................... 43,560
Cubic feet
1 CFS equals ................................................................................. 448.8
GPM
........................................................................................................ 1.98
AF per day
........................................................................................................... 40
Miner's inches
1 GPM equals ................................................................................ 1,440
Gallons per 24 hour day
........................................................................................................ 1.61
AF per year
1 Surface Acre equals ................... Size of area in square feet 43,560
QUICK CONVERSIONS
MI X 11.22 = GPM
CFS X 40
= MI
MI
40
= CFS
CFS X 448.8 = GPM
MI X .0495 = AF/DAY
CFS X 1.98 = AF/DAY
GPM
11.22 = MI
AF/DAY
1.98
= CFS
GPM
448.8 = CFS
AF/DAY X 226.67 = GPM
GPM
226.67 = AF/DAY
AF/DAY
.0495 = MI
GENERAL WATER REQUIREMENTS
DOMESTIC USE
1 family - up to 5 people . . 1 AF/YR
1 acre shelter belt . . . 2.50 AF/season
1 acre lawn & garden . . . . 2.50 AF/season
Shop use. . . 1 AF/YR
STOCKWATER USE
An animal unit (AU) is a measurement of livestock numbers. A cow and calf pair is one animal unit. Weaned animals
are counted as one unit each.
Number of AU's X .017 = AF/YEAR
Number of AU's X .017 365 X Days = AF/Period of Use
1 Bison
1.5 AU
2 Ostrich
1 AU
50 Geese
1 AU
1 Horse
1.5 AU
3 Llamas
1 AU
50 Ducks
1 AU
1 Dairy Cow
1.5 AU
3 Pigs
1 AU
100 Turkeys
1 AU
1 Beef Cow
1 AU
5 Deer
1 AU
100 Rabbits
1 AU
1 Elk
1 AU
5 Sheep
1 AU
125 Prairie Dogs
1 AU
2 Emus
1 AU
300 Chickens
1 AU
OTHER USES
Crop spraying . . . . . . . . . . . . Gallons/acre X acres 325851 = AF/YR
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Parent category: Life