Frequently Asked Questions
Are these pool calculators free?
Yes. Every calculator on PoolPad is free to use, works in your browser, and doesn't require an account. Just enter your numbers and get an answer.
Which calculator should I start with?
Start with the Pool Volume Calculator — almost every other calculation (chemicals, salt, shock, pump run time) depends on knowing how many gallons your pool holds.
How accurate are the results?
The calculators use the same standard formulas pool pros use, so they get you very close. Real-world factors like sunlight, splash-out, and your exact chemical strength vary, so always re-test your water after dosing and adjust.