Pool Salt Requirement Calculator
Calculate exactly how many pounds of salt your pool needs
Calculation Results:
Total Salt Needed: 0 lbs
Number of Bags (approx): 0 bags
How to Use the Pool Salt Calculator
Maintaining the correct salt concentration is vital for your salt water chlorine generator (SWCG) to function efficiently. Most salt systems require a concentration between 2,700 and 3,400 ppm (parts per million), with 3,200 ppm being the industry standard "sweet spot."
Step-by-Step Guide to Adding Salt
- Test Your Water: Never guess your salt level. Use a digital salt meter or reliable test strips to find your current ppm.
- Calculate Volume: If you don't know your pool size, calculate it first (Length x Width x Average Depth x 7.5 for rectangular pools).
- Input Data: Enter your current ppm, target ppm (usually 3,200), and pool volume into the calculator above.
- Add Salt: Pour the salt around the perimeter of the deep end of the pool.
- Circulate: Turn on the pool pump and let it run for 24 hours to fully dissolve the salt before re-testing.
Example Calculation
Suppose you have a 20,000-gallon pool. Your test kit shows a current salt level of 400 ppm (natural water often has some salt). You want to reach 3,200 ppm.
- Difference: 3,200 – 400 = 2,800 ppm needed.
- Formula: (2,800 / 1,000,000) * 8.34 * 20,000
- Result: Approximately 467 lbs of salt.
- In 40lb bags: 11.7 bags.
Important Salt Tips
Use High-Purity Salt: Always use 99.8% pure evaporated granulated salt. Avoid using rock salt or salt with anti-caking agents, as these can stain your pool finish and damage the salt cell.
Don't Over-Salt: It is much easier to add more salt than to remove it. If you over-salt your pool, the only way to lower the concentration is to partially drain the pool and refill it with fresh water.