Pool Salt (Salinity) Calculator

Inputs

Design

Pool volume

Units

Current salinity (ppm)

Target salinity (ppm)

Salt purity (%)

Bag label. Typical pool salt ≈ 99%.

Bag size (lb)

Common bag = 40 lb

Use the target salt range in your chlorine generator manual. Add the calculated dose in stages and retest; do not add a rounded-up bag count.

Results

Live

Salt to add

0 lb

0 kg

Bags to purchase

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Volume cross-check

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Advisory

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How it's calculated

Transparency

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Notes: 1 ppm = 1 mg/L. Pounds of pure salt required = Δppm × gallons × 8.3454 ÷ 1,000,000. Adjusted for bag purity. If current salinity is higher than target, no salt is added; consult your pool professional about the readings and options before replacing any water.