Pool & Water Calculators
Pool and water calculators figure gallons, chemical dosing, and liner sizing for pools and ponds.
Above Ground Pool CalculatorAquarium Substrate CalculatorAquarium Volume CalculatorHot Tub Volume CalculatorKoi Pond CalculatorMuriatic Acid Pool CalculatorPond Cost CalculatorPond Liner CalculatorPond Volume CalculatorPool Chlorine CalculatorPool Gallons CalculatorPool Heat Pump Sizing CalculatorPool Pump Size CalculatorPool Salt CalculatorPool Sand CalculatorRound Pool CalculatorStock Tank Pool CalculatorTank Volume Calculator
Frequently asked questions
Why do I need to know my pool volume in gallons?
Every chemical dose, chlorine, salt, pH adjusters, algaecide, is calculated per gallon of water. An accurate volume number is the foundation for safe, effective water chemistry.
How do I handle a pool with a shallow and deep end?
Use the average depth: add the shallow-end and deep-end depths and divide by two. A 3-ft to 8-ft pool averages 5.5 ft. For complex profiles with a long shallow shelf, weight the average toward the larger area.
How much does it cost to fill a pool?
Municipal water typically runs $0.004-$0.02 per gallon depending on your utility, so a 15,000-gallon pool costs roughly $60-$300 to fill from the tap. Bulk water delivery costs more but is much faster.