Free pool calculators that get the water right

PoolTally is a growing set of fast, focused pool calculators that run entirely in your browser. How many gallons your pool holds, how much chlorine to add, and how much salt to reach the right level. One job per tool, no signup, and nothing you type ever leaves your device.

No signup Runs in your browser Free forever Updated for 2026

Tools

Why PoolTally

Built for one job

Each tool answers a single question well, so you get the dose or the volume fast and the page stays easy to read.

Private by design

Every calculation happens in your browser. Your numbers are never sent to a server or stored anywhere.

Start with volume

Almost every dose depends on the gallons. Work out the volume once, then reuse it across the chlorine and salt tools.

Free, no account

No login, no paywall, no email required. Open a tool and start keeping the water right.