Accurate Pool Volume Calculator: Customize Sections, Features & Adjustments

Measure length, width and depth, key them into the calculator, then hit “Calculate.” The app multiplies cubic feet by 7.48052 to return gallons—so a 1,500 ft³ pool holds 11,221 gal (USGS, 2020). Subtract stairs or benches for precision. That figure lets you dose chemicals, size heaters and predict water costs.