Calculate total gallons in your swimming pool based on shape and depth, plus get recommended chemical shock dosages.
Measurement System
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Average Depth
Knowing exactly how much water is in your pool is the first and most critical step in proper pool maintenance. Whether you're balancing chemicals, winterizing, or installing a new pump, guessing your pool size will lead to expensive mistakes. Our Pool Volume Estimator takes the hassle out of the complex geometry. Simply select your pool shape, choose between Imperial or Metric units, and input your dimensions to instantly calculate your pool's total volume in US Gallons or Liters.
Most backyard swimming pools are not perfectly flat; they feature a sloped bottom from the shallow end to the deep end. Our intelligent calculator automatically averages your depth measurements to find the precise cubic volume (cubic feet or cubic meters). It then applies industry-standard volume multipliers—customized for rectangular, circular, oval, and kidney-shaped designs—to convert that geometric area into an incredibly accurate liquid capacity count.
After a heavy rainstorm, a major pool party, or a sudden algae bloom, you need to 'shock' your pool to restore its sanitary balance. However, adding too much chlorine can bleach your liner and irritate skin, while adding too little will fail to kill bacteria. Once your total water volume is accurately calculated, our tool immediately provides baseline recommendations for standard chlorine shock dosages (calculating precisely in pounds or kilograms based on the industry standard of 1 lb per 10,000 gallons). Stop guessing and keep your water crystal clear.