Interval: A scale that represents quantity and has equal units but for which zero represents simply an additional point of measurement is an interval scale. The Fahrenheit scale is a clear example of the interval scale of measurement. Thus, 60 degree Fahrenheit or -10 degrees Fahrenheit represent interval data.
Convert Gallons to Acre-feet: Divide Gallons by 325,851. Example: An 800,000 gallon pond = 2.46 acre feet. Convert Acre-feet to Gallons: Multiply Acre-feet by 325,851. Example: A 5 acre-foot pond = 1,629,255 gallons. Background. One acre-foot is equivalent to one-acre of water that is one-foot deep. An acre is a measure of surface area that totals 43,560 square feet. An acre can be of any shapeâa rectangle, a triangle, a circle, or even a starâso long as its area is exactly 43,560 square feet.
As the name suggests, an acre-foot is defined as the volume of one acre of surface area to a depth of one foot. Since an acre is defined as a chain by a furlong (i.e. 66 ft Ã 660 ft), an acre-foot is 43,560 cubic feet (1,233 m 3).