About Every Pool Calculators

Every Pool Calculators started with one problem. Pool math is simple, but the numbers live in five different places: a chemical label, a pump curve, an old liner receipt and two forum posts. We put the whole set in one spot so you can go from a tape measure to an answer in under a minute.

What we build

The site hosts 23 calculators covering water volume, water chemistry, equipment sizing and project cost. Each tool runs in your browser. Nothing you type gets sent to a server, stored or sold. There is no account to create and no limit on how many times you use a tool.

How we check the math

Every formula on the site comes from published pool industry practice: 7.48 gallons per cubic foot for volume, 8.34 pounds per gallon for chemical dosing, and the ASHRAE surface evaporation method for water loss. We show the formula next to each calculator so you can check the work by hand. If a result looks wrong for your pool, the inputs are usually the cause, most often a water depth measured at the wall instead of averaged.

Who uses these tools

Homeowners opening a pool in spring, service techs dosing six pools a day, and families pricing a build all use the same calculators. The wording stays plain on purpose. You should not need a chemistry class to work out a chlorine dose.

Where to start

Start with the Pool Volume Calculator. Almost every other tool on the site needs that number. Once you have it, the Pool Salt Calculator and the Pool Chemical and Chlorine Calculator take seconds. Planning a build instead? Try the Pool Cost Calculator and the Pool Loan and Financing Calculator.

Get in touch

Found a formula you disagree with, or a tool you want added? Use the contact page and tell us what your pool looks like. Real pool details help more than a bug report.