Free interactive calculators for diagnosing well water problems and sizing treatment equipment. Every tool uses standard water treatment math (grains per gallon, flow rate in GPM, contact time) and EPA drinking water thresholds, so you can check the numbers before you talk to a dealer.
Not sure where to start? Use the diagnostic calculator first. If you do not have lab results yet, read how to test well water.
Well Water Diagnostic and System Sizing Calculator
Pick your symptoms, enter your household size and optional lab values, and get a treatment train (sediment, iron, softener, UV) sized to your flow rate.
Water Softener Grain Capacity Calculator
Turn hardness (GPG), iron and household size into the grain capacity your softener needs, so it regenerates on schedule instead of every other day.
Water Hardness by ZIP Code Lookup
Enter a ZIP code to see the median well water hardness for that county in gpg and mg/L, its USGS class and a starting softener size. Covers Florida and California so far.
Well Pump and System Flow Rate (GPM) Calculator
Estimate peak household demand in gallons per minute and check whether your pump and filters can keep up without pressure drops.
Annual Well Water System Maintenance Cost Estimator
Add up salt, filter cartridges, UV lamps, media replacement and testing to see what your system really costs per year.
Limescale Damage and Energy Penalty Calculator
See how much hard water scale adds to your water heating bill and appliance wear, based on your hardness level.
Well Shock Chlorination Dosage Calculator
Calculate how much household bleach to use for your well depth and casing diameter after a positive coliform test.