N&M
Water Softener Calculator
N&M Products · nmproductsusa.com
Step 1 — Water Hardness
💧
Water Hardness (GPG)
Adjust slider or tap a category
GPG17 GPG
Soft <7Moderate 7–14Hard 15–25Very Hard >25
Houston area: 17–22 GPG avg. Adjust if tested on-site.
Step 2 — Household Size
👨👩👧👦
People in the Home
75 gallons per person per day
Number of people
300 gallons/day estimated
4
Step 3 — Fixtures & Appliances
🏠
Count Each Fixture
Determines peak flow rate (GPM)
Bathrooms
🚿Shower2.0 GPM
1
2.0🛁Bathtub4.0 GPM
0
0.0🪥Bathroom Sink1.0 GPM
1
1.0🚽Toilet3.0 GPM
1
3.0Kitchen & Laundry
🍳Kitchen Sink1.5 GPM
1
1.5🍽️Dishwasher1.5 GPM
0
0.0👕Washing Machine3.0 GPM
0
0.0Outdoor
🌿Garden Hose / Irrigation5.0 GPM
0
0.0Flow Analysis
📊
Peak Flow Rate
ASHRAE residential diversity factor
Installed Flow
7.5
GPM direct sum
Design Flow
5.6
GPM w/ diversity
Daily Water Use
300
gallons/day
Grains/Day
5100
to remove
Diversity factor: 0.79 — Few fixtures installed.
System Recommendation
Recommended System
N&M ProductsRequired Resin Tank Capacity
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Adjust the settings above to calculate.
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Calculating…
Installation Type—
Required Service Flow—
Minimum Tank Capacity—
Recommended Capacity—
Days Between Regenerations—
Salt Per Regeneration Cycle—
Estimated salt every 90 days—
Adjust the settings above to calculate your recommendation.
💧 Ready? Book your free water test or call (832) 614-2347 — next-day installation available.
N&M
Client Summary
Share with the homeowner or save to Notes.
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