PoolCalc

Pool math you can actually trust

Interactive calculators built on documented real-world numbers — with the math shown, every input shareable, and no popups. Drag a slider; watch the cockpit respond.

Salt conversion cost & paybackThe flagship: itemized startup costs, annual savings, payback gauge — from a documented real conversion.Pool salt calculatorExact pounds and bags to hit your chlorinator's target ppm.Pool volume calculatorTrue geometric gallons — rectangle, round or oval, sloped bottoms handled.Pump savings calculatorWhat a variable-speed pump saves at your real electric rate.

Why these are different

Most pool calculators online are content-farm filler — a thin form wrapped around a guess. These are built by a practicing engineer from real measured data (the conversion calculator's defaults are a documented 15,000-gallon project), every formula is shown in a "see the math" panel, and your inputs live in the URL so you can share or save your exact scenario. Read the methodology.