Water Softener Size Calculator
Size softener grain capacity, service flow and regeneration interval from household use, hardness and iron.
live visual
transparent result
Calculator inputs
Water Softener Size Calculator results
How the calculation works
Daily grain load = people × water use × (hardness + iron adjustment); capacity includes regeneration interval and reserve.
What to verify
Use a water test and manufacturer efficiency settings; sulfur, manganese and high iron may require separate treatment.
How accurate is this calculator?
It is a transparent planning calculation based on the entered values and stated assumptions. Verify inputs and obtain professional or supplier confirmation where the decision is consequential.
Does it use U.S. defaults?
Yes. U.S. units, terminology, pricing conventions and rules are the primary defaults where location matters.
Is data sent to a server?
No. The calculation runs locally in the browser and does not send entered values to a remote calculation service.