Pool Chemistry Formula Library
Every calculation behind the calculators — explained with symbols, worked examples, and plain-English notes. Reference these formulas to understand exactly how chemical doses are derived.
All Formulas
Learn the pool volume formula with worked examples. Calculate pool gallons for rectangular, oval, circular, and irregular-shaped pools.
Learn how to calculate the correct liquid chlorine dose for your pool size. Includes worked example and limitations.
Learn the pool shock formula. Calculate exactly how much calcium hypochlorite to add for maintenance, breakpoint, or algae recovery.
Why pool pH adjustment can't be reduced to a simple ounces-per-gallon formula the way chlorine and alkalinity can, and what to do instead.
Calculate the exact amount of sodium bicarbonate needed to raise your pool's total alkalinity with the alkalinity formula.
Calculate how many pounds of pool salt to add using the salt formula. Includes worked example for any pool size.
Calculate the correct cyanuric acid (stabilizer) dose for your pool with the CYA formula and worked example.
Calculate your pool's turnover rate with the turnover formula. Find required pump run time and verify filtration is adequate.
Understand the Langelier Saturation Index formula. Learn what LSI measures, how to calculate it, and what the score means for your pool.