Free operator tools
Water operator calculators
Free calculators for the operator math on the Texas Class D water and wastewater exams. Every one shows its full worked solution and names each constant it uses, so you learn the method, not just the number. No account, and nothing here claims an exam result.
Rectangular or round tank volume in gallons, from your dimensions, with every step shown.
Open the toolChlorine dosage calculatorDose, demand, and residual in mg/L. Enter the two you know, get the third, worked in full.
Open the toolGallons and cubic feet converterConvert between gallons and cubic feet either direction, at 7.48 gallons per cubic foot.
Open the toolCircular tank area calculatorSurface area of a round tank or clarifier in square feet, from the diameter.
Open the toolWastewater flow rate calculatorConvert MGD, GPM, and GPD, or find flow from a volume and a time, worked in full.
Open the toolPump run time and volume calculatorHow long a pump runs to move a volume, or the gallons it moves in a set time.
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