Swimming Pool Volume Calculator
Enter pool shape and dimensions to get total gallons, fill time from a garden hose, and how much pool shock, chlorine, and stabilizer you need for initial startup.
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How to Use This Calculator
- 1Enter your measurements in the fields above. Use the units shown next to each field (ft, in, etc.).
- 2Click Calculate to get your material estimate instantly.
- 3Review the highlighted result — it shows the key quantity you need to order.
- 4Use Copy Results to save your estimate, or bookmark the URL — your inputs are encoded in the link.
Pro tip: Always add 10% to your material order to account for waste, cuts, and defects.
Frequently Asked Questions
How many gallons is a 16×32 pool?
A 16×32 rectangular pool with a 5-foot average depth holds approximately 19,200 gallons. With a shallow end of 3 ft and deep end of 8 ft, the average depth is 5.5 ft, giving about 21,100 gallons.
How long does it take to fill a pool with a garden hose?
A standard garden hose delivers about 9 gallons per minute (540 GPH). A 20,000-gallon pool takes about 37 hours, or roughly 1.5 days of continuous filling.