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Pool Volume & Salinity Calculator

Choose your pool shape to estimate its water volume, then see how much salt to add.

Rectangular Pool

Rectangular Pool

Length (A):

ft

Width (B):

ft

Shallow End Depth (SD):

ft

Deep End Depth (DD):

ft
CALCULATED POOL VOLUME
0
GALLONS

Oblong Pool

Oblong Pool

Large Diameter (A):

ft

Small Diameter (B):

ft

Length (C):

ft

Shallow End Depth (SD):

ft

Deep End Depth (DD):

ft
CALCULATED POOL VOLUME
0
GALLONS

Circular Pool

Circular Pool

Diameter (A):

ft

Shallow End Depth (SD):

ft

Deep End Depth (DD):

ft
CALCULATED POOL VOLUME
0
GALLONS

Triangular Pool

Triangular Pool

Height (A):

ft

Base Length (B):

ft

Shallow End Depth (SD):

ft

Deep End Depth (DD):

ft
CALCULATED POOL VOLUME
0
GALLONS

Salinity Calculator

Find Out Exactly How Much Salt to Add.

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Salt Calculator
Shop Saltwater Pool Care

Pool Volume:

gal

Current Salt Level:

ppm

Desired Salt Level:

ppm
SALT TO ADD
0
POUNDS

Pool Salt Calculator & Guide

Get Your Saltwater Pool Balanced with Ease

Shop Salt Water Pool Care

A saltwater pool offers a smoother swim, less maintenance, and lower chlorine costs over time. But achieving the right salinity level is key—and that starts with knowing how much salt your pool needs.

Use our free calculator below to figure out how much pool salt to add based on your current salt level, desired salt level, and pool size.

How to Use the Calculator

  • Measure your pool volume

    Know your pool's total gallons (you can calculate this using your pool shape).

  • Test your current salt level

    Use a digital salt meter or test strip.

  • Set your desired salt level

    Most saltwater pools aim for 3,200–3,600 ppm.

  • Get your result

    Our calculator tells you exactly how many pounds of salt to add.

Pro Tip: Always add salt in stages and retest—oversalting can take time (and water) to correct.

What’s the Ideal Salt Level?

Most saltwater chlorine generators operate best between 2,700 – 3,600 ppm. Check your system’s manual for the optimal range. For most systems:

TOO LOW

<2,700 PPM

Chlorine generator won’t produce chlorine efficiently

IDEAL

3,200 – 3,600 ppm

Balanced, smooth, and sanitized water

TOO HIGH

> 4,000 ppm

Can damage the generator or cause skin/eye irritation

Salt Tips from XtremePowerUS

  • Always use pool-grade salt—avoid table salt or rock salt.
  • Add salt directly to the deep end with the pump running.
  • Let the system circulate for 24 hours before retesting.
  • Never pour salt into the skimmer.

How Much Salt Should I Keep on Hand?

Use this guide to stock up:

Pool Size (gallons) Pounds Needed (for 3,200 ppm)
10,000 ~267 lbs
15,000 ~400 lbs
20,000 ~533 lbs

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