Terms of Use
Use the calculators for your own pool, lawn, or yard. Results are estimates. They are not a warranty, not a professional soil test, and not a substitute for the label on a chemical product.
Your Responsibility
You choose the inputs. You confirm the salt system, the product strength, the roll size, the waste percent, the soil-test lime rate, and the depth. Where this site has no verified number, it asks you to supply one or it leaves the cell blank.
You confirm the product strength, including whether a liquid chlorine percent is trade percent or weight percent. We don't have a verified figure for 65% cal-hypo, so enter the percent on your label.
Do not mix pool chemicals. The safety block on the chemical pages is part of these terms as well as part of the page.
Terms of Use FAQ
Are the calculator results a promise?
No. They are estimates from the formulas and cited figures on each page. Follow the product label for any chemical.
Does this site sell pool or lawn products?
No. There are no prices and no purchase links.
Can you rely on an unverified cell?
No. A cell marked Not verified is not a number you should use.