Pool Volume Calculator
Find out how many gallons your pool holds. A 32 x 16 ft rectangular pool with a 5 ft average depth holds about 19,150 gallons.
Pool volume formulas
Volume in cubic feet depends on the shape. Multiply cubic feet by 7.48 to get US gallons.
- Rectangle: length x width x average depth
- Round: 0.785 x diameter x diameter x average depth
- Oval: 0.785 x length x width x average depth
For a 32 x 16 x 5 ft rectangle that is 2,560 cubic feet, or 19,150 gallons (72,491 liters).
Average depth
If your pool has a shallow and a deep end, add the two depths and divide by two. For example a pool that goes from 3 ft to 7 ft has an average depth of 5 ft. Pools with a sharp drop or a deep hopper need a more careful estimate.
Why volume matters
Chemical doses, heater sizing and pump turnover all depend on gallons. Dosing for the wrong volume wastes money and can leave water unsafe.
Free pricing tips for your business
Get short, practical tips on pricing jobs and using our free calculators. No spam, unsubscribe any time.
Frequently asked questions
How many gallons are in a 16 x 32 pool?
About 19,150 gallons at a 5 ft average depth.
How do I find the average depth of my pool?
Add the shallow end depth and deep end depth and divide by two. For uneven pools, measure several points.
How much does it cost to fill a pool?
Water typically costs $2 to $10 per 1,000 gallons, so a 19,000 gallon pool costs roughly $40 to $200 to fill.
How long does it take to fill a pool?
A garden hose delivers about 9 gallons per minute, so 19,000 gallons takes about 35 hours.
Need a custom calculator or spreadsheet built for your business?
Talk to usMore free tools: All free calculators · Cubic yard calculator · Square feet calculator · Mulch calculator