Pool Volume Calculator
Estimate your pool's water volume in gallons, liters, cubic feet, and cubic meters. You can also estimate chlorine, salt, shock treatment, and fill time from a hose flow rate.
How to Use
- Choose the pool shape that best matches your pool: rectangle, round, oval, or kidney/freeform.
- Enter the main dimensions in feet or meters.
- Use average depth for simple pools, or enter shallow and deep end depths for sloped pools.
- Review the calculated volume and optional chemical estimates.
- Add hose flow rate in GPM if you want a quick fill-time estimate.
Frequently Asked Questions
How do I calculate pool volume in gallons?
Measure the pool's main dimensions, estimate the average depth, and multiply using the right shape formula. Our calculator handles the geometry, then converts the result into gallons automatically.
Should I use average depth or shallow and deep end depth?
If your pool floor is mostly flat, average depth is fine. If it slopes from a shallow end to a deep end, averaging those two depths gives a better estimate.
How accurate are kidney or irregular pool estimates?
Irregular pools are harder to model exactly, so this calculator uses a practical shape factor to produce a close planning estimate. For chemical dosing, always verify with pool testing after filling.
How much shock do I need for my pool?
A common rule of thumb is about 1 pound of shock per 10,000 gallons, but products vary. Use the estimate here as a starting point, then follow the label directions for your specific shock treatment.