Swimming Pool Volume Calculator: How Much Water Do You Need?

Volume of water (gallons) = Length (feet) x Width (feet) x Depth (feet) x 7.48

Here, 7.48 is the number of gallons in one cubic foot.

Let's say you have a swimming pool that is 20 feet long, 15 feet wide, and 5 feet deep. The volume of water in this pool would be:

Volume of water (gallons) = 20 x 15 x 5 x 7.48 = 11,220 gallons

This formula can be used to calculate the amount of water needed to fill a swimming pool, or to determine how much water has been lost due to evaporation or splashing.