If you bought a pump with a higher GPM than your pool, you risk bursting the system and wasting your electricity. The maximum flow rate is the highest water flow your pool plumbing system, and other equipment can support. Pool Volume (Gallons) / Turnover rate (Hours) = Min Flow Rate (GPH) Calculate the Maximum Flow Rate Pool Volume (Gallons) / Turnover rate (Minutes) = Min Flow Rate (GPM) If you’re a hands-on kind of a guy, here is the formula for calculating the minimum required flow rate: If you don’t want to go along with all the math, below is a simplified minimum flow rate calculator. It’s much better for pool chemistry balancing, improved turnover, and saves on energy bills.Ĭalculating the minimum flow rate is quite simple all you need is your pool’s volume in gallons and divide it by the turnover in minutes (GPM) or hours (GPH). It changes its speed up and down depending on the need at hand. That’s why you might want to consider getting yourself a variable speed pump. However, the pool chemistry balancing doesn’t do well. With higher horsepower, the run time reduces as doing so, the power consumption decreases. However, your electricity bills will be over the roof. If you use a low horsepower pump for long, you gain better water chemistry balancing. What you need to do here is to consider balancing electricity consumption with the pump horsepower.
Experts in the industry recommend you give your chlorine or saltwater swimming pool two turnovers per day. Here you will need to use the pool capacity and the number of your pool’s turnover cycles per day. The pool ‘turnover’ rate gives you the minimum time it takes for the whole pool water to be pushed by the pump through the filter and back to the swimming pool. The minimum flow rate gives you the number of gallons pumped per minute or per hour to meet the pool turnover. You could also use the Gallon per Hour (GPH). Now that you have your pool volume, it’s time to move to the next step calculate the minimum flow rate to expect from your pool pump in Gallons per Minute (GPM). Once you have the volumes of the smaller pieces, add them up. Π (3.14) x radius squared(r2) x AVERAGE DEPTH x 7.5 = volume (in gallons)Ĭircular Pool w/Deep and Shallow Ends (Even though they are rare, they exists)ĪVERAGE DEPTH = (depth of deep end + depth of shallow end)/2 Kidney or Irregular Poolsĭivide your swimming pool into smaller regular shapes, then use the above formulas to calculate their volumes. Length x width x AVERAGE DEPTH x 7.5 = volume (in gallons)ĪVERAGE DEPTH = (depth of deep end + depth of shallow end)/2 Circular Pools w/uniform depth Square and Rectangular Pools w/Shallow and Deep Ends ( Length) x ( width) x ( depth) x 7.5 = volume (in gallons) Π = a constant used in calculating area or volume of a circle ( 3.14 or 22/7) Square or Rectangular Shaped Pools w/Uniform Depth R = distance across the center of a circular pool divided by 2 Constants and terms used:ħ.5 = Number of Gallons Present in a Cubic Foot If you want to do the calculations yourself, here are the formulas to help you determine how many gallons of water your pool holds. If you want a straight forward method, use the pool volume calculator below: There is a rectangular, circular, oval, and irregular-shaped pool. Pool capacity and calculations differ with the pool’s size and shape. The first metric is the pool volume which will help you determine the minimum and maximum flow rates required. Use our pool volume calculator below, and then we’ll start calculating the minimum flow rate you need for your pump. This calculation differs based on pool shape but is pretty straightforward. Calculations to Help You Figure Out the Best Pool Size Pump Calculate Your Pool Volumeįirst up, you need to figure out how many gallons of water are in your swimming pool.
In the end, you will have the ideal min-max flow rate range to help you find the perfect pool pump size for your swimming pool.īelow are few calculations that will break down the search and give you enough certainty that you’re buying the right size pump.
#Pool math calculator series#
And for you to get all these, you have to do a series of calculations. Your best pool pump size must meet your minimum and maximum flow rates, which you get by finding the pool volume first. Are you having a hard time selecting the best size pool pump for your above or inground pool? It doesn’t have to be complicated anymore.
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