well water specialist
Well Water Specialist
Well Water Treatment Experts And Products
An APSWATER Micro-Website™
A US Government Supplier DUNS 787700418

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If you need a new water softener try our
Water Softener Selection Calculator


Enter the height and width of your exisitng Water Softener.
This calculator will give you all the information you need
to set up a timer or meter based water softener.
Softener Tank Width In Inches Water Softener Calculator By Tank Size And Hardness Level
Softener Tank Height In Inches
Total Water Hardness (Grains per gallon)


Your Water Softener Capacity Specification

Ft3 of Resin Lbs. of salt per Ft3 Capacity in Grains Capacity in Gallons Lbs. of salt per regeneration Gallons
per lb of salt
0.87 15 27,942 2,794 13.1 185.4
0.87 10 23,576 2,358 8.7 234.7
0.87 8 20,957 2,096 7.0 300.0
0.87 6 17,464 1,746 5.2 333.3
Use The Above Settings To Set Up A Meter Based Water Softener

Ft3 = Cubic Feet


The maximum flow rate for this softener is 6.5 Gallons Per Minute.

Settings To Use For a Timer Based Water Softener
For Residential Users
Number of days the softener should last between regenerations
@ 6 lbs. Salt Setting
People in ResidenceDays
1 21.8
2 10.9
3 7.3
4 5.5
5 4.4
6 3.6
7 3.1
8 2.7
9 2.4
10 2.2
Based on The National Average of
80 Gallons Per Day Per Person
For Residential Users
Number of days the softener should last between regenerations
@ 8 lbs. Salt Setting
People in ResidenceDays
1 26.2
2 13.1
3 8.7
4 6.5
5 5.2
6 4.4
7 3.7
8 3.3
9 2.9
10 2.6
Based on The National Average of
80 Gallons Per Day Per Person
For Residential Users
Number of days the softener should last between regenerations
@ 10 lbs. Salt Setting
People in ResidenceDays
1 29.5
2 14.7
3 9.8
4 7.4
5 5.9
6 4.9
7 4.2
8 3.7
9 3.3
10 2.9
Based on The National Average of
80 Gallons Per Day Per Person
For Residential Users
Number of days the softener should last between regenerations
@ 15 lbs. Salt Setting
People in ResidenceDays
1 34.9
2 17.5
3 11.6
4 8.7
5 7.0
6 5.8
7 5.0
8 4.4
9 3.9
10 3.5
Based on The National Average of
80 Gallons Per Day Per Person


Calculator Assumptions

Usable Softener Resin Capacity is 32,000 Grains per ft3 at 15 lbs per ft3 salt charge
The maximum flow rate for Water Softener Resin Is 7 gallons per minute per ft3

Softener is 65% full of resin beads



If you do not know how hard your water is, you can use this map to get a rough idea.

water softener capacity calculator

Water Softener Calculator By Tank Size And Hardness Level

All Images are representative and may or may not be of actual product.

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