šŸ“Š Free Sizing Utility

Water Softener Size Calculator

Determine the exact resin capacity and system size you need to treat your water hardness efficiently.

Sizing Parameters

Average: 150 Liters per person per day.
Get this from a test. E.g. Jaipur is 400-800 PPM.

Calculated Softener Sizing Requirements:

Hardness Load to Remove (Grains/Cycle): 0 grains
Recommended Resin Volume: 0 Liters
Recommended System Class: Standard 25L Unit
Est. Salt Needed Per Regeneration: 0.0 kg

How Sizing Calculations Work

Water softener sizing is determined by the total mineral hardness (expressed in grains) that the system must filter out between regenerations. The formula is:

Total Grains = Daily Usage (Gallons) x Hardness (Grains Per Gallon) x Regeneration Interval (Days)

We convert Liters to Gallons (1 Gallon = 3.785 Liters) and PPM to Grains Per Gallon (17.1 PPM = 1 Grain/Gallon). A standard liter of high-capacity cation exchange resin can hold approximately 2000 to 2400 grains of water hardness before requiring regeneration with salt brine.