Units, Conversions & Basic Operator Math
Build the core math skills used throughout water and wastewater operations, including fractions, decimals, percentages, rounding, units, and practical unit conversions.
Water & Wastewater Operator Math
7 articles
Articles
Area, Volume & Tank Calculations
Learn how to calculate area, tank volume, liquid depth, and capacity for rectangular and circular water and wastewater structures using operator-standard formulas and units.
Flow, Velocity & Detention Time Calculations
Learn how to calculate flow, velocity, and detention time using consistent units, tank volume, cross-sectional area, and practical water and wastewater examples.
Pressure & Head Calculations
Learn how water pressure and head are related, convert between psi and feet of water, calculate static pressure, and apply elevation differences to operator problems.
Chemical Dose & Feed Calculations
Learn the core chemical dose and feed calculations used by water and wastewater operators, including the 8.34 formula, product strength, solution feed rates, and pump calibration.
Loading, Mass & Removal Efficiency
Learn how to calculate mass loading, pounds per day, pounds applied, percent removal, and treatment efficiency from flow and concentration data.
Process Control Calculations
Learn core wastewater process control calculations, including solids inventory, F/M ratio, MCRT, SVI, sludge wasting, return sludge rates, and practical operator checks.