Water Softener Calculator
Enter your water hardness, iron level, and daily usage to get recommended regeneration frequency, salt dosage, and complete programming settings for popular Fleck, Clack, GE, and Whirlpool softeners. Not sure of your numbers? Estimate them from your ZIP code or a quick household profile below.
Calculator
Fleck 5600
20 GPMPopular residential valve with reliable mechanical metered control
Don't know your water hardness?
Test your water at home with one of these kits for the most accurate softener settings.
JNW Direct Water Hardness Test Strips
150 strips
Quick and accurate hardness testing with easy-to-read color chart. Great for regular monitoring.
View on AmazonVarify 17-in-1 Water Test Kit
17 parameters
Tests hardness, iron, pH, chlorine, lead, and 12 more parameters. Full water quality picture.
View on AmazonSJ Wave 16-in-1 Water Test Kit
16 parameters
Professional-level accuracy with detailed testing for hardness, metals, and contaminants.
View on AmazonGuides & Resources
Understanding Water Hardness
What GPG and PPM mean, and how hardness affects your home.
Programming Guide
How to open the settings menu on each model, plus every Fleck SXT parameter explained.
Maintenance Schedule
Weekly, monthly, and yearly tasks to keep softening working.
Troubleshooting
Fixes for salt bridges, hard water, pressure loss, and more.
Disclaimer
This calculator is provided "as is" without warranties. Results are for reference only and should be verified by a qualified professional. Local water conditions and regulations may affect actual requirements. Always consult a licensed plumber or water treatment professional before making changes to your system.