Proposed 05
Pump duty & motor power
Combine static lift, pressure, friction and efficiency into a preliminary pump duty point.
Outputs flow · TDH · hydraulic kW · motor estimate
Watermart field tools
Useful water calculations, without the spreadsheet hunt.
A bilingual toolbox for water and wastewater people: quick enough for a site visit, transparent enough to check, and connected to the equipment behind the answer.
01Both unit systems 02Assumptions shown 03Sources linked 04Products in context
Calculator library
A practical map of the treatment plant
Seven calculators are live now; process-sensitive wastewater tools remain on the reviewed roadmap.
Flow & hydraulics
Start with the numbers that determine vessel, pipe, pump and tank size.
Live calculator 01
Filter service & backwash
Turn vessel diameter and media loading rates into service flow, backwash-pump flow and wash-water volume.
Outputs m³/h · GPM · bed area · wash volume
Open calculator→
Live calculator 02
Home water demand & filter
Separate daily consumption from probable peak fixture flow, then estimate a filter only after selecting the medium.
Outputs L/day · WSFU · m³/h · vessel & media
Open calculator→
Live calculator 03
WellMate pressure tank
Calculate drawdown, nominal tank volume and the smallest listed WellMate model from real pump duty.
Outputs drawdown · litres · cycle time · model
Open calculator→
Live calculator 04
Pipe velocity & pressure loss
Check velocity, Reynolds number and estimated friction loss from flow, diameter, length and pipe material.
Outputs m/s · ft/s · bar · metres of head
Open calculator→ Proposed 06
Tank volume & detention time
Solve useful volume, operating time, freeboard and turnover for rectangular or cylindrical tanks.
Outputs m³ · litres · minutes · tank dimensions
Filtration & ion exchange
Translate water demand into media, resin, cartridges and regeneration requirements.
Live calculator 11
Water softener sizing
Estimate resin volume, working capacity, run length, salt and regeneration water from flow and hardness load.
Outputs litres resin · m³/run · kg salt · valve flow
Open calculator→
Live calculator 12
Cartridge quantity & housing
Estimate cartridges, housings and equivalent 10-inch lengths from design flow and cartridge format.
Outputs elements · housings · length · clean ΔP check
Open calculator→ Proposed 13
Filter media & gravel quantity
Convert vessel geometry, bed depth and freeboard into media volume, bags and approximate wet weight.
Outputs litres · ft³ · bags · freeboard
Proposed 14
Activated-carbon contact time
Calculate empty-bed contact time, bed volumes per hour and carbon volume for a target duty.
Outputs EBCT · BV/h · carbon volume · vessel count
Chemical dosing & membranes
Make chemical preparation and membrane mass balances easier to check.
Live calculator 21
Dosing-pump flow
Convert plant flow, target dose, product strength and density into L/h, daily chemical use and pump turndown.
Outputs L/h · mL/min · kg/day · pump range
Open calculator→ Proposed 22
Solution dilution & batch mixing
Work out stock chemical, water addition and final concentration for a make-up tank.
Outputs C₁V₁ = C₂V₂ · kg · L · batch time
Proposed 23
RO flow balance & membrane count
Relate feed, permeate, concentrate and recovery, then create a preliminary element and vessel count.
Outputs recovery · flows · elements · pressure vessels
Proposed 24
Disinfection contact tank
Estimate effective contact time and required basin volume with a selectable baffling factor.
Outputs CT · effective minutes · volume · residual
Wastewater operations
Fast checks for biological treatment, clarification and sludge handling.
Proposed 31
Equalization tank volume
Use an hourly inflow profile and controlled discharge to visualize required balancing storage.
Outputs m³ storage · peak level · pump setpoint
Proposed 32
F/M ratio, SRT & sludge age
Check activated-sludge loading using flow, BOD/COD, MLSS, basin volume and solids wasting.
Outputs F/M · kg/day · days SRT · biomass inventory
Proposed 33
Clarifier surface loading
Calculate overflow rate, solids loading, weir loading and approximate detention time.
Outputs m³/m²·day · kg/m²·day · m³/m·day
Proposed 34
SVI, RAS & wasting rate
Turn settleability and solids data into SVI plus preliminary return- and waste-sludge flows.
Outputs mL/g · RAS flow · WAS flow · solids/day
Recommended rollout
Build the calculators people use before they buy.
- Live now Filter, home demand, pressure tank, pipe, softener, cartridge and dosing
- Next Media quantity, activated-carbon contact time, pump duty and tanks
- Then RO, tanks, pumps, contact time and wastewater operations