About Pool Volume
Pool Volume was created with one goal: to give pool owners, service professionals, and builders the most accurate, free pool volume calculator available online.
Our Mission
Our mission is simple — eliminate guesswork from pool care. Whether you need to calculate chlorine doses, estimate fill times, or size a new pump, everything starts with knowing your exact pool volume. We built Pool Volume to handle every pool shape with industry-standard formulas, giving you results you can trust. We focus on helping every pool owner calculate pool volume accurately and use that volume for safer water treatment dosing.
Accuracy You Can Trust
All calculations use the same geometric formulas trusted by pool industry professionals. We use the standard 7.48 gallons per cubic foot conversion (commonly rounded to 7.5 in the field), and apply shape-specific factors like the 0.45 multiplier for kidney and freeform pools. Because each design behaves differently, we provide guidance by layout in our pool volume by shape breakdown.
Free Forever
Pool Volume is completely free — no sign-ups, no ads, no data collection. Just enter your measurements and get instant, reliable results. You can always start from our main pool volume calculator homepage with no paywall or signup.
6 Pool Shapes
Rectangular pools, round pools, oval pools, L-shaped layouts, kidney designs, and freeform shapes covered.
Chemical Calculator
Get precise chlorine, pH, algaecide, and shock dosages based on your exact pool volume.
Fill Time Estimator
Know exactly how long it will take to fill your pool from any water source.
Equipment Sizing
Pump HP and heater BTU recommendations matched to your pool's actual volume.
Explore Pool Volume Tools
Need a specific calculator? Try the above-ground pool volume calculator, hot tub volume tool, or browse our pool volume by size reference.
For planning and conversion help, see the average pool volume guide, gallons calculator, litres calculator, and shape-based volume guide.