Enter the water length, the water width, and the water depth into the Water Volume Calculator (select units as needed). The calculator will evaluate and display the Water Volume. 

Water Volume Calculator

Enter any 3 values to calculate the missing variable

Water Volume Formula

The following formula is used to calculate the Water Volume. 

WV = WL * WW * WD * 7.48052
  • Where WV is the Water Volume (US gallons)
  • WL is the water length (ft) 
  • WW is the water width (ft) 
  • WD is the water depth (ft) 

How to Calculate Water Volume?

The following example problems outline how to calculate Water Volume.

Example Problem #1

  1. First, determine the water length (ft). The water length (ft) is given as 500.
  2. Next, determine the water width (ft). The water width (ft) is given as 200.
  3. Next, determine the water depth (ft). The water depth (ft) is found to be 40.
  4. Finally, calculate the Water Volume using the formula above: 

WV = WL * WW * WD * 7.48052

Inserting the values from above yields: 

WV = 500 * 200 * 40 * 7.48052 = 29,922,080 (US gallons)

FAQ

How do you convert water volume from gallons to liters?

To convert water volume from US gallons to liters, multiply the volume in gallons by 3.78541. For example, if you have 100 gallons of water, it would be 100 * 3.78541 = 378.541 liters.

Can the water volume formula be used for pools of irregular shapes?

The water volume formula provided (WV = WL * WW * WD * 7.48052) is best suited for rectangular or square pools. For pools of irregular shapes, you would need to use different methods or formulas tailored to those specific shapes, such as dividing the pool into sections that can be approximated as rectangles or using a more complex mathematical model.

Why is the number 7.48052 used in the water volume formula?

The number 7.48052 is used in the water volume formula to convert cubic feet of water to US gallons, as there are approximately 7.48052 US gallons in a cubic foot. This conversion factor simplifies the calculation when measuring water volume in feet and needing the result in gallons.