About PoolSizer

Our Mission

PoolSizer was built to give pool owners and professionals quick, accurate calculations without the hassle. Whether you're figuring out how many gallons your pool holds, dosing chemicals, or sizing a new heater — our tools give you answers in seconds.

Built for Poolside Use

Every calculator is designed mobile-first with large, touch-friendly inputs. Use them on your phone right at the pool. Print results to keep handy for your pool maintenance routine.

Disclaimer

PoolSizer calculators provide estimates based on mathematical formulas and the dimensions you enter. Always follow chemical manufacturer instructions for dosing. Consult a pool professional for equipment sizing decisions. We are not liable for results from using these calculators.