Water Equivalents Table
Unit of measurement	Equivalent
1 gallon	231 cubic inches 8.33 pounds
1 cubic foot	7.48 gallons 62.4 pounds
1 acre foot*	325,900 gallons 43,560 cubic feet
1 cubic foot per second (cfs)	448.8 gallons per minute (gpm)
1 cfs @ 24 hours	1.983 acre-feet
1 cfs @ 30 days	59.5 acre-feet
1 cfs @ 1 year	724 acre-feet
1,000 gallons per minute (gpm)	2.23 cfs 4.42 acre-feet per day
1 million gallons	3.07 acre-feet
1 million gallons per day (mgd)	1,120 acre-feet per year
* One acre-foot is enough water to cover a football field one foot deep, or to supply two average families for one year.