Free tool
Which Pool Calculator Do I Need?
Eight calculators, one question at a time. Answer below and we'll take you straight to the right one.
Question 1 of 2
What are you trying to do?
Frequently asked
Questions about picking a calculator
What if my test kit shows more than one reading out of range?
Pick the reading that's furthest outside its acceptable range first — that's usually the one causing the most day-to-day problems (cloudy water, algae, irritation). Most pool professionals also recommend balancing total alkalinity before pH, since alkalinity acts as pH's buffer.
Can I just run the full water balance calculator instead?
Yes — the LSI (Langelier Saturation Index) calculator looks at pH, temperature, calcium hardness, and total alkalinity together, which is a good option if several readings look slightly off rather than one obvious outlier.