Free Pool Service Tools
Instant calculators for the numbers that matter at poolside — water balance, volume, dosing, salt, circulation, and chlorine. Free, no sign-up, built for wet hands.
LSI Calculator
Langelier Saturation Index in real time, with CYA-corrected alkalinity — is your water corrosive, balanced, or scaling?
Open calculator →Pool Volume Calculator
Estimate gallons (or liters) for rectangular, round, oval, and freeform pools — the starting point for every dose.
Open calculator →Chemical Dosing Calculator
How much acid, soda ash, baking soda, or calcium chloride to add — by volume, with an estimated cost per dose.
Open calculator →Saltwater Salt Calculator
Pounds of salt (and 40-lb bags) to reach your salt chlorine generator's target — no more guesswork at the SWG.
Open calculator →Pump Run-Time Calculator
Turnover time and daily run hours from pool volume and pump flow rate — circulate the whole pool without overrunning.
Open calculator →Free Chlorine Calculator
The right free-chlorine target for your CYA level, using the industry FC/CYA ratio — for manual and saltwater pools.
Open calculator →Built by Pool People
These calculators use the same industry-standard formulas that power the PoolFlow iOS app — the volume formulas, dosing rates, and FC/CYA ratios pros rely on. They're a great way to check a number fast. When you're managing a whole route, PoolFlow does it all automatically: real-time water balance, dosing priced from your own inventory, and per-pool profit tracking, even offline.
Tools FAQ
Put These Calculations on Autopilot
PoolFlow runs every one of these calculations automatically for each pool on your route — offline, at poolside. Free for up to 5 pools.