Calculator category
Plumbing Calculators
Use 47 field tools for pipe hydraulics, pressure, pumps, hot water, drainage, layout, materials, testing, leaks, and water use. Move from pipe and fixture measurements to pressure, flow, pump, hot-water, drainage, testing, purchasing, and conservation decisions. Use actual pipe dimensions and locally approved criteria.
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Select a topic to reveal its calculators. Multiple topics can remain open at the same time.PlumbingUse 47 field tools for pipe hydraulics, pressure, pumps, hot water, drainage, layout, materials, testing, leaks, and water use.47 available
Pipe Hydraulics & Supply
- Pipe Volume CalculatorCalculate total liquid capacity for one or more equal pipe runs, including partial fill and fill or drain time.Open calculator
- Flow Rate CalculatorMeasure flow from collected volume and time, solve the time needed for a target volume, or convert an entered flow rate.Open calculator
- Water Velocity CalculatorSolve pipe velocity, flow rate, or required inside diameter from the other two quantities, with an optional velocity limit.Open calculator
- Pipe Friction Loss CalculatorEstimate water head and pressure loss using Hazen–Williams, including entered equivalent fitting length.Open calculator
- Darcy-Weisbach Pressure Loss CalculatorCalculate major pipe loss from an entered Darcy friction factor, fluid density, flow, length, and inside diameter.Open calculator
- Water Supply Pipe Sizing CalculatorSize a water-supply pipe from either an entered friction allowance or a complete pressure budget, then check a candidate actual inside diameter.Open calculator
- Multi-Section Pipe Pressure Loss CalculatorAdd Hazen–Williams losses across three pipe sections carrying the same water flow.Open calculator
- Available Fixture Pressure CalculatorReconcile supply pressure, elevation, pipe friction, and equipment losses at a remote fixture.Open calculator
- Pressure and Water Head ConverterConvert between pressure and equivalent water-column head using an entered water density.Open calculator
- Hydrostatic Pressure CalculatorCalculate static water pressure from vertical depth, density, and an optional surface pressure.Open calculator
- Gravity-Fed Pipe Flow CalculatorEstimate full-pipe gravity water flow using Hazen–Williams from diameter, energy-slope drop, length, and entered C factor.Open calculator
Pumps & Pressure
- Booster Pump Pressure CalculatorCalculate the added pressure and head needed after supply pressure, elevation, and downstream losses.Open calculator
- Total Dynamic Head CalculatorCombine static elevation, pressure difference, suction/discharge friction, equipment losses, and velocity-head change for pump planning.Open calculator
- Pump Hydraulic Power CalculatorCalculate hydraulic and required shaft power from flow, total head, density, and entered pump efficiency.Open calculator
- NPSH Available CalculatorEstimate net positive suction head available from absolute surface pressure, static liquid level, vapor pressure, and suction losses.Open calculator
- Water Hammer Pressure Rise CalculatorEstimate the theoretical instantaneous pressure rise from an abrupt velocity change using the Joukowsky relationship.Open calculator
Hot Water
- Tankless Water Heater Sizing CalculatorCalculate simultaneous hot-water flow and heating input from fixture groups, then compare an entered candidate heater at the same temperature rise.Open calculator
- Storage Water Heater Sizing CalculatorBuild peak-hour hot-water demand from up to four draw groups or enter a known total, then compare it with usable storage and recovery.Open calculator
- Water Heater Recovery Time CalculatorCalculate heating energy, recovery time, and recovery rate for a water volume and heater input.Open calculator
- Water Heating Energy and Cost CalculatorEstimate input energy, heating time, and operating cost for raising a measured water volume through a temperature change.Open calculator
- Hot and Cold Water Mixing CalculatorCalculate hot and cold portions, mixed volume, or usable mixed-water capacity from three temperatures.Open calculator
- Domestic Hot Water Expansion Tank CalculatorEstimate expanded-water acceptance and minimum idealized tank volume from system volume, entered expansion factor, local atmospheric pressure, and gauge-pressure range.Open calculator
- Hot Water Recirculation Flow CalculatorCalculate recirculation flow needed to carry an entered loop heat loss within an allowed temperature drop.Open calculator
- Hot Water Wait Time CalculatorEstimate wait time and water discharged before hot water arrives from pipe volume and fixture flow.Open calculator
- Hot Water Pipe Heat Loss CalculatorEstimate steady pipe heat loss from an entered linear heat-loss coefficient, length, and water-to-ambient temperature difference.Open calculator
Drain, Waste & Vent
- Drain Pipe Slope CalculatorSolve drain fall, slope, or maximum run and convert among percent, millimetres per metre, and inches per foot.Open calculator
- Drainage Fixture Unit WorksheetTotal visitor-entered drainage fixture-unit groups without assuming a jurisdiction's fixture values.Open calculator
- Drain and Waste Pipe Size CheckerCompare a design DFU load with an entered code-table capacity for a selected pipe size and slope.Open calculator
- Vent Pipe Size and Length CheckerCompare a proposed vent diameter and developed length with limits taken from the visitor's selected code table.Open calculator
- Trap to Vent Distance CheckerCheck a measured trap-arm distance and fall against visitor-entered limits from the selected local code.Open calculator
- Horizontal Drain Capacity CalculatorEstimate uniform full-pipe gravity capacity using Manning's equation as a hydraulic reference, not code sizing.Open calculator
- Sump and Sewage Ejector Pump CalculatorEstimate basin drawdown volume, pump runtime, and cycling from basin geometry, inflow, and pump rate.Open calculator
Layout & Installation
- Pipe Offset CalculatorLay out a simple two-bend pipe offset from perpendicular offset and bend angle.Open calculator
- Rolling Offset CalculatorLay out a rolling offset from horizontal roll, vertical rise, and equal bend angle.Open calculator
- Pipe Travel and Set CalculatorResolve pipe travel into perpendicular set and parallel advance, or solve travel from set and angle.Open calculator
- Pipe Cut Length CalculatorCalculate straight cut length between fitting centres after visitor-entered takeouts at both ends.Open calculator
- Pipe Bend Travel CalculatorCalculate bend centreline arc length, chord, rise, and advance from bend angle and centreline radius.Open calculator
Materials & Purchasing
- Pipe Material List CalculatorEstimate stock lengths, couplings, and purchase surplus for repeated straight pipe runs.Open calculator
- Pipe Insulation Quantity CalculatorEstimate insulation sections and outer surface area from pipe length, outside diameter, insulation thickness, and stock section length.Open calculator
- Pipe Support Quantity CalculatorCalculate support count and actual maximum spacing from run length and a visitor-entered permitted spacing.Open calculator
Service, Testing & Water Use
- Plumbing Leak Rate CalculatorCalculate leakage flow and projected water loss from a collected leak volume and elapsed time.Open calculator
- Drip Water Loss and Cost CalculatorEstimate water loss and cost from measured drips per minute and an entered average drop volume.Open calculator
- Water Meter Usage CalculatorCalculate metered water use, average daily demand, projected billing-period use, and optional cost.Open calculator
- Pressure Test Loss TrackerTrack pressure change and average loss rate during a static test against a visitor-entered allowable drop.Open calculator
- Pipe Fill and Drain Time CalculatorCalculate pipe-system liquid volume and ideal fill or drain time for equal runs at a measured flow.Open calculator
- Storage Tank Fill Time CalculatorCalculate rectangular or cylindrical tank volume, remaining fill volume, and fill time from measured dimensions and flow.Open calculator
- Toilet and Fixture Water Savings CalculatorEstimate water and cost savings from replacing fixtures with a lower measured or rated volume per use.Open calculator