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
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Pool Volume Calculator
How many gallons your pool holds, for rectangle, round, and oval pools.
Live
🧪
Pool Chlorine Calculator
How much liquid chlorine, granular shock, or tablets to raise the level.
Live
🌪️
Pool Salt Calculator
Pounds of salt to reach the target level for a salt water pool.
Live
☀️
Pool Heating Cost
What it costs to heat a pool with gas, electric, or a heat pump.
Soon
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Pool Acid Calculator
Muriatic acid to lower pH and total alkalinity to the right range.
Soon
🌊
Pool Fill Time
How long a pool takes to fill from a garden hose, by volume.
Soon
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.