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Plumbing & Water Calculators

Calculate toilet water savings, household consumption, on-demand heater sizing, hardness treatment, leak volumes, pipe quantities and plumbing project budgets.

Available plumbing & water calculators

15 calculators for this project type.

Plumbing & WaterWater Heater Cost CalculatorMeasure the energy needed to raise water temperature and keep water-heater installation costs distinct from electricity charges.

Plumbing & WaterWhole House Repiping Cost CalculatorBudget hot and cold supply line replacement with measured pipe runs, separate connections and wall-repair allowances.

Plumbing & WaterSewer Line Replacement Cost CalculatorBudget an excavated sewer replacement by separating pipe stock, trench excavation and surface reinstatement.

Plumbing & WaterWater Supply Line Cost CalculatorCompare purchased supply-line pipe, buried route excavation and quoted connections without assuming site-specific code requirements.

Plumbing & WaterDrain Pipe Repair Cost CalculatorEstimate localized waste-pipe repairs with separate pipe sections, couplings, opened finishes and plumbing labor.

Plumbing & WaterSump Pump Cost CalculatorMeasure basin working volume and discharge stock before comparing separately quoted sump pump components.

Plumbing & WaterPipe Volume CalculatorFind the internal liquid volume of circular pipe runs from the bore diameter, with gallons, liters and exchange-volume quantities.

Plumbing & WaterWell Pump Operating Cost CalculatorEstimate electricity and operating charges from measured pump power and actual or assumed daily run time.

Plumbing & WaterDrainage Pipe Slope CalculatorTurn measured invert elevations into downhill fall, percent grade and target-drop comparisons for a drainage run.

Plumbing & WaterRainwater Harvesting CalculatorConvert an individual rainfall event into potential rooftop runoff and calculate stored gallons, overflow and nonpotable-use duration.

Plumbing & WaterTankless Water Heater Sizing CalculatorCompare simultaneous hot-water fixture demand with a tankless heater’s rated flow at the required temperature rise.

Plumbing & WaterWater Leak Cost CalculatorCalculate leak volume from measured gallons per minute or drips per minute, then estimate volume-based utility charges.

Plumbing & WaterShower Water Usage CalculatorCompare current and alternative showerhead use with adjustable shower duration, household frequency and energy assumptions.

Plumbing & WaterWater Softener Sizing CalculatorEstimate the nominal grain capacity needed for a household based on tested hardness, treated gallons and regeneration targets.

Plumbing & WaterToilet Water Savings CalculatorEstimate water and utility savings from replacing a toilet using measured flush rates and household use.

Planning plumbing & water projects

Tankless Sizing compares peak fixture flow and winter temperature rise with rated heater delivery; Shower Usage and Leak Cost compare measured water consumption. Softener Sizing uses measured hardness, while Pipe Volume and Rainwater Harvesting evaluate distinct fluid quantities. Construction budgets use entered project quotations.