Pool Volume Calculator – Easy! – (and Pump Size!)

Welcome to the Pool Volume Calculator & Pump Size Calculator – your free and user-friendly tool for estimating the water volume (in gallons) of your swimming pool and determining the ideal pool filter pump for your pool.

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Calculating these essential parameters for your pool has never been easier, eliminating the need for complex equations or guesswork (what’s the square-root of “pi” again?!?!). Quick and easy!

How Many Turnovers Per Day is Best?

The effectiveness of filtering your pool water improves with each turnover, but it doesn’t reach 100% with just one or two turnovers due to the principles of water circulation and filtration efficiency. Here is the breakdown:

1. 1 Turnover: Filters about 63% of your pool water.
2. 2 Turnovers: Filters about 86% of your pool water.
3. 3 Turnovers: Filters about 95% of your pool water.
4. 4 Turnovers: Filters about 98% of your pool water.

This phenomenon can be explained using the concept of exponential decay in the context of mixing and filtering water. After each turnover, the probability of filtering any remaining unfiltered water decreases.

While these percentages are a good general guideline, the exact efficiency can vary based on factors like the design of the pool, the efficiency of the pump and filter system, and how well the water circulates within the pool.

Most people shoot for about 90% of the water being recirculated per day, which corresponds to about 2.5 turnovers per day.

Why Use Our Pool Volume Calculator?

Swimming pool maintenance is a vital aspect of pool ownership, ensuring crystal-clear water and a safe, enjoyable experience for all. The first step in effective pool maintenance is knowing your pool’s water volume, which directly impacts chemical treatments, filtration efficiency, and overall pool health.

Our calculator simplifies this process, empowering you with accurate estimates without the hassle of manual calculations. Whether you’re a pool owner, a pool maintenance professional, or just planning your dream pool, our calculator provides valuable insights into your pool’s water capacity.

Why Estimations Matter

Precision is vital in pool maintenance, but estimations can be incredibly helpful in planning and optimizing your pool’s care routine (for example, how much chlorine to add – check out our Chlorine Calculator). Our calculator provides estimations that are highly useful for your needs and help you avoid the complexities of precise measurements.

What Size is My Pool Pump?

To use this tool, you need to know how many gallons per hour your pump cycles through. This is usually easy to find on the box or the pump itself, for example, the BestWay 1500 pool pump, pumps 1500 gallons per hour, so it is right in the name.

How Our Calculator Works

Pool Volume Estimation: We begin by asking for your pool’s dimensions, such as length, width, depth, or diameter, depending on your pool’s shape. The calculator then estimates your pool’s water volume in gallons.

Pump Size Recommendation: Armed with your pool’s volume, we calculate the ideal pool filter pump size. This recommendation is based on the number of turnovers you desire per day (typically at least 1 for effective filtration) and the number of hours you plan to run your pump.

Cost-Effective Pool Maintenance

Running your pool pump continuously can be costly. With our calculator, you can strike a balance between maintaining water quality and managing operational expenses. Get recommendations tailored to your specific needs, ensuring efficient filtration while optimizing energy usage.

Bookmark for Future Reference

Pool maintenance is an ongoing process, and you may need this valuable information again in the future. We encourage you to bookmark this page for quick access whenever you require pool volume or pump size estimates.

No Login, No Fees – It’s Free!

We believe that essential tools for pool maintenance should be accessible to everyone without any barriers. Our calculator is completely free to use, and you don’t need to create an account or pay any fees. Enjoy hassle-free access to accurate pool volume and pump size estimates.

Begin by selecting your pool’s shape above, enter your pool’s dimensions, and let our calculator provide you with the information you need for a sparkling, well-maintained pool.

Equations Used in This Calculator

Pool Volume Estimation:

Round Pool Volume (ft³) = π × (Diameter / 2)² × Depth (ft) × 7.48 (gal/ft³)

Rectangular Pool Volume (ft³) = Length (ft) × Width (ft) × Depth (ft) × 7.48 (gal/ft³)

Pump Size Recommendation:

Required Pump Flow Rate (gallons per hour) = (Pool Volume (gallons) × Desired Turnovers per Day) / Hours of Pump Operation per Day

Required Hours of Pump Operation per Day = (Pool Volume (gallons) × Desired Turnovers per Day) / Pump Size (gallons per hour)

These equations are used to estimate your pool’s water volume and recommend the number of hours per day that you should run your pump in order to achieve the desired turnovers per day based on the size of the pump that you have. These estimations are valuable tools for efficient pool maintenance and cost-effective operation.