Free Tools for septic, well and hard water homes — all results are estimates, county/state rules govern. Choose a tool below; each tool has its own page.
Septic Tank Size Calculator
Find a planning estimate for the right septic tank size for your home, based on bedrooms, occupants, soil type and garbage disposal use.
Water Softener Size Calculator
Work out the grains per week your home needs, and the softener tier to check, from the number of people, your water hardness and any iron.
Well Pump Size Estimator
Get a planning GPM range for household demand — not a pump selection — from the number of bathrooms and other major uses running at the same time.
Hardness Converter
Convert between mg/L and grains per gallon, with a general hardness category.
Septic Pumping Interval Estimator
Get a planning range for how often to pump, from tank size, household size and garbage disposal use.
Disclaimer: All results are estimates for planning only. County and state rules govern — check with your local authority.