Swimming Pool Volume & Chemical Dosage Calculator
Calculate pool water volume in gallons, chemical shock doses, saltwater chlorinator salt lbs, and filter pump flow rates.
Calculated Results
Frequently Asked Questions
What is the formula to calculate pool volume in gallons?
Rectangular: Length × Width × Average Depth × 7.48. Circular: Diameter² × Average Depth × 5.875. Oval: Length × Width × Average Depth × 6.7. (Average depth = (Shallow End Depth + Deep End Depth) / 2).
How much shock should you add to a pool?
The standard dosage for calcium hypochlorite pool shock (68% available chlorine) is 1 pound per 10,000 gallons of pool water to raise free chlorine by 7.5 to 10 ppm. A 20,000-gallon pool requires 2 pounds of shock.
What are the ideal water chemistry ranges for a swimming pool?
Free Chlorine: 2.0 to 4.0 ppm; pH: 7.4 to 7.6 (matches human tears); Total Alkalinity: 80 to 120 ppm; Calcium Hardness: 200 to 400 ppm; Cyanuric Acid (Stabilizer): 30 to 50 ppm.
How long should pool pumps run each day?
The Association of Pool & Spa Professionals recommends turning over the entire volume of pool water at least once every 24 hours. For an average residential pool, running an energy-efficient variable speed pump for 8 to 10 hours daily achieves optimal filtration.