“TWSB – Water Softener Sizing Calculator”

TWSB – Water Softener Sizing Calculator

Calculate the right water softener size for your home and learn how to apply proper sizing methodology.

How to Use the Calculator

  1. Enter hardness in gpg and iron in ppm (if present).
  2. The calculator compensates iron (1 ppm ≈ 4 gpg) and totals hardness.
  3. Adjust people/fixtures to reflect peak demand and daily usage.

Quick Sizing Tip

Most homes use a 45,000 grain single-tank or twin-tank system. Twin-tank softeners alternate tanks for 24/7 soft water and less salt/water use.

This tool is part of The Water Softener Blog educational series. Powered by TWSB’s Water Treatment Methodology: Advocacy · Expertise · Methodology · Education.

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The Water Softener Blog encourages your constructive comments on our blog and content. If there is a water treatment problem you would like to see discussed here please send us a suggestion and we will do our best to accommodate your request.

Thank you, Ray

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