Home & Cooking
Pool Volume Calculator
Calculate swimming pool volume in gallons and liters for rectangle, round, or oval pools. Supports variable depth (shallow + deep end) and gives a rough chlorine dose estimate.
Pool details
Pool volume
21,065 gallons
That is 79,740 liters or 2,816 cubic feet.
Surface area
512 sqft
Trichlor (initial dose)
~2.11 oz
Chlorine estimate uses 1 oz trichlor per 10,000 gallons as a starting point. Always test water and follow product labels.
Frequently Asked Questions about the Pool Volume Calculator
What is a typical home pool size in gallons?
Most residential inground pools hold 15,000 to 30,000 gallons. A 16 x 32 ft rectangle with an average depth of 5 ft works out to about 19,200 gallons. A round above-ground pool (24 ft diameter, 4 ft deep) holds roughly 13,500 gallons.
Why do I need to know my pool volume?
Chemical doses for chlorine, pH adjusters, algaecide, and salt are all calibrated per gallon. Guess too low and the water stays cloudy or unsafe; guess too high and you waste product or irritate swimmers' eyes. Volume also sets the pump turnover time you need to keep the water clean.
How is the chlorine estimate calculated?
The calculator applies 1 oz of trichlor per 10,000 gallons as a conservative starting dose, so a typical 15,000-gallon pool gets about 1.5 oz. That is a planning figure, not a target ppm: 1 oz per 10,000 gallons raises free chlorine by roughly 0.6 to 0.7 ppm, and real dosing shifts with sunlight, bather load, stabilizer (CYA) level, and your current reading. Test the water before every dose.
Should I use average depth or shallow-end plus deep-end depths?
Enter both the shallow-end and deep-end depths if your pool has a slope, and the calculator averages them to find an effective depth, which is accurate enough for chemical dosing. If your pool has a flat bottom, such as most above-ground pools, just enter a single uniform depth.
Does pool volume change for salt water vs. chlorine pools?
No. Volume is strictly water capacity, the same regardless of sanitation method. Salt pools do need an initial salt charge, usually targeting around 3,000 to 3,500 ppm depending on your system, which is also dosed per gallon. The volume figure here applies to both pool types.