Pool Calculators
Know your pool. Stop guessing.
Calculate pool gallons, chlorine, salt, heating time, fill time, and water balance with free browser-based pool tools. Save your pool once and reuse it across every calculator.
Pool Utilities Directory
Select a specialized calculator to calculate dosages, fill rates, or thermal energy.
Pool Volume Calculator
Calculate swimming pool volume in gallons and litres for rectangle, round, oval, kidney, and custom pools with shallow and deep ends. Save your pool on your device.
Pool Salt Calculator
Find how much pool salt in pounds, kilograms, and 40 lb bags you need to reach your target salinity. Reuses your saved pool volume automatically.
Pool Chlorine Calculator
Calculate how much liquid chlorine, bleach, cal-hypo, dichlor, or trichlor to add to your swimming pool to reach target Free Chlorine ppm safely.
Liquid Chlorine Pool Calculator
Calculate the exact liquid chlorine dose in fluid ounces, cups, quarts, gallons, or litres for 6%, 7.5%, 10%, 12.5%, or custom sodium hypochlorite.
Pool Baking Soda Calculator
Estimate how much baking soda (sodium bicarbonate) in pounds and kilograms to add to raise pool Total Alkalinity to safe buffered levels.
Pool Fill Time Calculator
Calculate how long it takes to fill your pool with garden hoses or water trucks. Includes a built-in bucket flow test to measure your exact hose GPM.
Pool Heating Time Calculator
Estimate pool heating duration based on pool gallons, initial and target water temperature, heater BTU/h output, and thermal efficiency.
Pool Chemical Calculator
Complete pool water balance dashboard. Check Free Chlorine, pH, Total Alkalinity, Stabilizer, Calcium, and Salt with safe, sequenced adjustment recommendations.
Muriatic Acid Pool Calculator
Scientifically calculate muriatic acid dosage based on carbonate alkalinity buffering and pool volume. Avoid dangerous rapid pH drops with safe staged guidance.
How the Pexlii Pool Ecosystem Works
Calculate Once
Use the Pool Volume Calculator with your specific pool dimensions and shallow/deep slope to find your exact pool gallons and surface area.
Save as My Pool
Click "Save as My Pool". Your volume is securely stored in this browser on your device. No signups, no emails, no remote tracking.
Reuse Everywhere
When you open Chlorine, Salt, Baking Soda, Fill Time, or Heating calculators, your pool volume is automatically loaded and ready to calculate.