Free pool calculators
Pool math, done right.
Find your gallons, dose chemicals precisely, set the right chlorine level for your stabilizer and check whether your water is corrosive or scaling.
Pool volume calculator
Every dose starts with an accurate volume. Use average depth for sloped floors.
Your pool holds about
0gallons
0 liters · average depth 0
Chemical dosing calculator
How much to add to move one number from where it is to where you want it.
Add about
0fl oz
Estimates assume the product strength shown. Add chemicals in front of a return with the pump running, one product at a time, and retest before adding more. Always follow the label.
Chlorine & stabilizer chart
The right free chlorine level depends on your CYA.
Minimum ≈ 7.5% of CYA, shock (algae-clearing) level ≈ 40% of CYA. Outdoor pools generally need some CYA to keep the sun from burning off chlorine.
Water balance (LSI)
Will your water etch surfaces or leave scale?
LSI0.00Balanced
Ideal pool water chemistry chart
Target ranges for a typical outdoor residential pool. Always follow your equipment and surface manufacturers' specs.
At least 7.5% of your CYA level; 3–5 ppm is a safe daily target for most outdoor pools.
Acceptable 7.2–7.8. Low pH etches and stings; high pH clouds water and weakens chlorine.
Buffers pH. Salt pools and plaster often run steadier at 60–80 ppm.
Protects plaster and pebble. Vinyl and fiberglass are happy around 150–250 ppm.
Sunscreen for chlorine. Salt pools typically 60–80 ppm. Indoor pools need little or none.
Follow your cell maker’s spec — most target about 3,200 ppm.
Chloramines cause the “chlorine smell.” Above 0.5 ppm, shock.