Everyday life

Pool Salt Calculator

Find salt needed for a saltwater pool.

Calculated Output

Salt to add 337.97

40 lb bags 9

Formula: salt (lb) = gallons × 8.345 × (target − current) ÷ 1,000,000

Step-by-Step Breakdown

1. Values used:

2. Pool volume = 15,000

3. Target salt level = 3,200 ppm

4. Current salt level = 500 ppm

6. Salt to add = 337.97

7. 40 lb bags = 9

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The math behind it

salt (lb) = pool water weight (lb) × (target − current ppm) ÷ 1,000,000.

15,000 gal, 3,200 target, 500 current → ~338 lb.

Check first?

Always test your water before adding — over-salting is hard to fix.