About Pool Calc Hub

Pool Calc Hub exists for one reason: pool chemistry questions deserve straight answers with the math shown.

Why we built this

Most pool "answers" online are buried in forum threads, hidden behind signup walls, or written to sell you something. Meanwhile, the actual math behind chemical dosing is simple and public — it's just arithmetic.

So we built calculators that show their formulas, use the same industry-standard constants (8.34 lbs per gallon of water), and give you a number you can take to the pool store and verify.

Our principles

• Show the math. Every calculator page documents its formula. If we're wrong, you can prove it.
• No signup. Your pool's numbers are your business. Everything runs in your browser.
• Free forever. The site is supported by unobtrusive advertising, not paywalls.
• Estimates, honestly labeled. Real pools have real-world surprises. We always tell you to re-test after dosing.

Who it's for

Owners of saltwater and chlorine pools — new pool owners doing their first salt startup, DIYers balancing their own water, and anyone tired of guessing how many bags to buy.

Get in touch

Found a bug, or want a calculator we don't have yet? Email contact@poolcalcshub.com — requests from pool owners go straight to the top of the list.