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AREA
1 acre = 43,560 ft2
1 mile2 = 640 acres
¼ Section = 160 acres

FLOW RATES
1 acre-ft/day = 43,560 ft2
1 MGD = 640 acres
1 MGD = 160 acres
1 MGD = 694.44 gpm
1 MGD = 11.574 gps
1 MGD = 1.54723 cfs
1 cfs = 646,317 gpd
1 cfs = 448.83 gpm
1 cfs = 1.9835 acre-ft/day
1 cfs = 0.64632 MGD
1 gpm = 1,440 gpd
1,000 gpm = 2.228 cfs
1,000 gpm = 4.4192 acre-ft/day
$1 per 1,000 gal = $325 per acre-ft

TIME
1 yr = 365.25 days
1 yr = 52.14286 weeks
1 month = 30.4 days
1 day = 1,440 min
1 hr = 3,600 sec
VOLUME & WATER WEIGHT
1 acre-ft = 43,560 ft3
1 acre-ft = 325,851 gal
1 ft3 (cubic foot) = 7.4805 gal
1 ft3 = 62.37 lb water
1 gallon = 8.35 lb water
1 gpm @ 24hrs = 1,440 gal

PRESSURE
1 atm = 14.7 psi
1 atm = 29.921 in Hg
1 atm =3.90 ft water column
1 bar = 0.9869 atm
1 psi = 144 psf
1 psi = 2.308 ft water column

POWER
1 kW = 3,412.3 BTU/h
1 kW = 1.34 Hp
For a 10-Hp motor running 24 hr/day,
@ $0.07/kW-hr = $381/mo
@ $0.10/kW-hr = $545/mo


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