What is the volume of water in gallons contained in a cubic foot?

To understand why 7.5 gallons is the correct volume of water contained in a cubic foot, it's important to recognize the conversion between cubic feet and gallons.

One cubic foot is equivalent to the volume of a cube that measures one foot on each side. When converting this volume to gallons, we use the conversion factor that 1 cubic foot is approximately 7.48 gallons. This conversion is derived from the fact that a gallon is a measure of liquid volume commonly used in the United States.

7.5 gallons is a rounded figure for easy reference, and many resources will refer back to this approximation. This makes it easier for those working in fields related to water treatment or management to quickly calculate the volume of water they are dealing with when expressed in cubic feet.

It's clear that 5 gallons, 10 gallons, and 12 gallons do not represent the correct conversion and would stem from incorrect calculations or misunderstandings of the conversion ratio between cubic feet and gallons. Therefore, recognizing and applying the correct conversion factor through practical understanding allows for accurate measurements in water treatment processes.