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How To Tell How Many Gallons My Pool Is

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Swimming Pool Volume Calculations


Pool volume is calculated based on length, width, and average depths. Basically we are trying to figure out the cubic area of the entire swimming pool, then multiply by a given volume of water per that cubic unit of measurement. Here are the multipliers, depending on the units of measurement you use.

  • 1 Cubic Foot = 7.48 gallons / 28.31 L
  • 1 Cubic Meter = 264.17 gallons / 1,000 L

The infographic above gives you the basics for those common shapes of pools. Obviously, free form pools that are not conveniently kidney-shaped are more difficult.

So On The Back Of Every Single Pool Chemical On Earth There Is Something In Common

And that is for X amount of gallons of water you need to add X amount of the chemical.

And how many gallons of water does your pool hold?

Well, if you dont know were gonna show you how to find out, lets dive in.

All right, if you want the quick answer and the easiest way to find out how many gallons is my pool calculator. and you can enter in your dimensions and your depth, and itll tell you how many gallons of water.

But if you have a very special pool or you want to do it the old-fashioned way were gonna show you every single type of measurement that youre gonna need, were gonna show you how to do the calculations, all the formulas, to find out how muchwater is in your pool.

Okay, so were about to get into some math and before we do that we need to whisk you back to middle school math class to get down some basics, so lets go.

Okay, before we start measuring your pool lets go over a few things well use to calculate your pools volumes.

Pool Calculator And Other Related Tools

If you’re thinking about constructing your own pool or pondpond in the backyard, you may want to calculate the amount of paint or tiles needed, and also the amount of pool salt and chlorine to be added.

The pool may also bring holidays to your mind – when laying on the beach or by the pool, don’t forget about putting sunscreen on! Make sure you know how long you can safely stay in the sun and which SPF factor to use – have a look at our amazing sunbathing calculator to find the answers.

If you associate the word pool with sports and fitness, you may want to check how many calories you’ll burn during a swim – give this calories burned calculator a go! Also, you may find the tools for assessing your speed or pace quite useful.

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Now That You Know How To Calculate The Number Of Gallons In A Pool:

Take your time and get as close as you can to the actual capacity of your pool in gallons. Do it once and youll always know. If you know who your pool builder was, they may have the digging diagrams or specifications on file, and they can tell you your exact pool water volume.

Once you know exactly how to calculate the number of gallons in a pool, its always a good idea to round up the number to the nearest thousand gallons when engaging in conversation with anyone about chemical additions.

Just an aside; its safe to say that the average size of an in ground pool is about 15,000 gallons.

Have fun and good luck!

Testing Your Pool Water

How Many Gallons Of Water Are In My Pool

You can not properly adjust your water chemistry unless you know where your at. So you need to test your water. There is a quick, simple, easy, and cheap way to test your water. I recommend Aquacheks #7 Dipping Strips.;You can buy them on Amazon for short money, you get 100 strips for like 15 bucks:;.

You could always go to your local pool store with a water sample, but they are in the business of selling chemicals, name brand chemicals. With my calculator and Aquachek strips, you can balance your water, and know exactly what you need, and dont need.

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Here is a great tool to calculate the volume or capacity of your pool. Important! Remember to measure from the depth of the water rather than the height of your wall.

More complicated pool shapes will require multiple calculations and adding them together. For more detailed information on the calculations, read more below the calculator. For additional help, contact a swimming pool professional.

Capacity calculations involve calculating surface area and volume of the pool or spa. This article describes in detail how to calculate the size and capacity of the pool you are planning. Calculating a pool’s area in square feet is the first step in determining information including pool gallons, maximum capacity of persons and other important information about your pool.

Now Youve Got Some Feet To Stand On

Alright, so you know how many gallons your pool contains. And guess what? Unless you move or get an entirely new pool, you never have to do this math again. So you can forget the last ten minutes foreverjust make sure you keep that final number handy for when youre adding chemicals or buying equipment. And hey, wouldnt it be nice to dive into thousands of gallons of clean water right about now? Enjoy.

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How To Calculate Pool Volume

Like a novice cook who needs to know how much of each ingredient to add to a dish, pool owners need to know how much of their maintenance products they need to add to their water. In order to do this properly, pool owners must know their pool volume how much water is actually in their pool.

Calculating your pool volume is essential to correctly balancing the water. Making only rough estimates can result in errors and end up causing issues. Over-estimating is a waste of money; under-estimating will result in unsanitary water. If the volume of your pool isn’t in the original documentation, it’s easy to calculate it yourself.

Chlorine / Free Chlorine

How To Calculate The Number of Gallons In A Pool

Chlorine is used to kill germs, algae, bacteria, and organisms like;Cryptosporidium. Free Chlorine is the amount available in your water to kill these things. You always want to maintain a free Chlorine level of at least 1. Min Max Range being 1 to 5, with 2-4 being ideal.

There are many different types;of Chlorine, with different strengths. Some are liquids, like Sodium Hypochlorite, Some are powders, like Trichlor, Dichlor, and Calcium Hypochlorite. NEVER MIX TYPES. If you pour liquid over solid it could go boom.

If you have a vinyl liner, you may use liquid Chlorine as I recommend, but you may also keep a couple Chlorine tabs/pucks in a floater, or in the skimmer basket. Do not pour liquid chlorine near the skimmer, or floater, with tabs/pucks in either.

The;calculator gives you a choice of these four chlorine types. So no matter which type of Chlorine you have, you know how much to use.

Recommended Reading: How To Raise Chlorine Level In Pool

Constant Depth Pools: Square Or Rectangular

Length x width x depth x 7.5 = volume

Length times width gives the surface area of the pool. Multiplying that by the depth gives the volume in cubic feet. Since there are 7.5 gallons in each cubic foot, multiply the cubic feet of the pool by 7.5 to arrive at the volume of the pool, expressed in gallons.

Chlorine Tablets Vs Chlorine Granules

Many pool owners believe that chlorine tablets and chlorine granules work well together. However, most tend to use granules at the beginning of the cleaning process to remove bacteria and algae.

This is because they usually remove these at a much quicker rate. If you havent treated your pool for a week or two, granules will get things done much quicker every time.;

That being said, chlorine tablets are very effective when used on a regular basis, once a week.

But, if you have a pool that is under regular rainfall, sunshine, or experiences frequent debris, chlorine granules are usually preferred. ;;

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Numbers Not Doing It For You Better Make A Call

If your distinctly-shaped pool doesnt break up well into other shapes, or if youre just not feeling like reliving middle school right now, you can always call in a professional. I know it costs, but itll save you a lot of money in the long run to treat the pool you actually have, not the approximations you guess.

And who knows? There might be a teenaged math genius in your neighborhood who could use some gas money. If youre hesitant to call in a professional, theres no harm in asking around.

Now that youve calculated your pool size, is it evident your pump isnt a good fit? Try the Copper Force Above Ground Pool Pump, which has a start capacitor and different horsepower options. According to customer Doug Paar, The pump is very quiet and has good pressure. I would recommend.

Come On Lets Be Measured About This

A gorgeous 15,000 gallon pool we recycled today.

Unfortunately, I cant be in your backyard with a measuring tape. Really wish I could help out, but its just not possible. So before we go furthereven in this next step, where you wont need to crunch any numbers to find out how much water is in your poolyou have got to know what youre working with. And the type of measurements you need? Those will depend on what shape of pool you have.

For a rectangular pool, youll want to know how long, wide, and deep your pool is. Remember to measure both the shallow end and the deep end.

For a circular pool, you just need to measure across the middle, and measure how deep it is.

Note: To keep your calculations as straightforward as possible later, its best to round to the nearest foot. Dont worry, your calculation will be accurate enough for choosing a pump, adding chemicals to your water, and all that other fun stuff pool owners get to do. And if you are just going to use the charts in the next step, no need to measure your depth.

Knowing your pool size will save you a lot of money on your pump and your energy bill, but itll also help you find the perfect heat pump, like the Energy-Saving ComforTemp Pool Heat Pump 95,000 BTU to heat 18,000 Gallons. According to customer Steve, Simple install and simple set up. Heated my pool from 66 to 82 degrees in about 2 complete days.

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Variable Depth Pools: Square And Rectangular

Length x width x average depth x 7.5 = volume

Length times width gives the surface area of the pool. Multiplying that by the average depth gives the volume in cubic feet. Since there are 7.5 gallons in each cubic foot, multiply the cubic feet of the pool by 7.5 to arrive at the volume of the pool .

Measure the length, width, and average depth of the pool, rounding each measurement off to the nearest foot or percentage of one foot. One inch equals 0.0833 feet. Therefore, multiply the number of inches in your measurements by 0.0833 to get the appropriate percentage of one foot.

Example: 25 ft, 9 in. = 25 ft +

= 25 + 0.75

= 25.75 ft

If the shallow end is 3 feet and the deep end is 9 feet, and assuming the slope of the pool bottom is gradual and even, then the average depth is 6 feet.

Average depth = / 2

Average depth = / 2 = 6 feet.

If most of the pool is only 3 or 4 feet and then a small area drops off suddenly to 10 feet, you will have a different average depth. In such a case, you might want to treat the pool as two parts. Measure the length, width, and average depth of the shallow section, then take the same measurements for the deeper section. Calculate the volume of the shallow section and add that to the volume you calculate for the deeper section.

Length x width x average depth x 7.5 = volume

25.75 ft x 10 ft x 6 ft x 7.5 = 11,587.5 gallons

Important Safety Rules To Follow When Balancing Pool Water

  • RULE #1: Always read product label and follow instructions.
  • RULE #2: Never mix chemicals .
  • RULE #3:;Never add water to chemical, always add chemical to water.

This article is a user manual for our pool water balance calculator seen above. It will also teach you what you need to know about proper pool chemistry, and how to maintain a healthy pool. To use our live calculator please click the image above, or This Link.

The first thing you should know about;our calculator is that its programmed for residential swimming pools only. Spas and commercial swimming pools require higher levels of chlorine.

The second thing you should know is its;only as accurate as your pool volume entered , and other data you supply. It can not give you precise measurements unless it knows how many gallons;are in your pool, or what your current chemical levels are. Pool Volume Chart

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How Does Your Pool Measure Up

Have you realized that youve been adding too much chlorine to your pool? Not enough shock? So much salt that you can no longer submerge? Yup, using a pool calculator will do that for you.

But at least now you know youll have your measurements correct, your water clean, and your pool ready for the season.

Happy Swimming!

Pool Pump Sizing Step By Step

How to Calculate Swimming Pool Volume or Gallons

We’ve put together a simple step by step guide to help you calculate what size pump is ideal for your pool. This will ensure that the pump is the most efficient size for your specific pool system. It will take a few minutes to work through these steps but it’s worth every minute when you figure out the correct size pump to circulate your pool water while saving you money every month in electrical savings.;

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How To Use The Pool Volume Calculator

\This pool volume calculator or pool size calculator is a handy tool for you to use when you need to find out how much water you need to fill up your pool. Instead of calculating the volume by hand, this online tool does the work for you in an instant. Here are the steps for you to follow for this how many gallons is my pool calculator:

  • First, choose the shape of your pool from the drop-down menu.
  • Then enter the value of the Width and choose the unit of measurement from the drop-down menu.
  • After that, enter the value of the Length and choose the unit of measurement from the drop-down menu.
  • Then enter the value of Depth 1 and choose the unit of measurement from the drop-down menu.
  • Finally, enter the value of Depth 2 and choose the unit of measurement from the drop-down menu.
  • After entering all of these values, the calculator automatically generates the value of the Pool Volume for you.

How To Calculate The Average Depth Of A Swimming Pool

Not every swimming pool is built with aneven pool bottom. Many inground pools have a shallow end for young children andlearner swimmers, and a deep end for the expert swimmers. Assuming yourswimming pool is deeper on one side than it is on the other, you can get theaverage depth by adding up the depth of each end, and dividing the sum by two.

Lets say the deep end is 10 feet, and the shallow end is 6 feet. If the pool bottom slopes evenly, then the average depth is /2 = 8 feet. But then, assuming that the larger part of the pool is just a few feet deep and then a smaller part of it drops to about 9 feet, youd have to calculate a different way.

You will need to treat the pool like it is split into two different pools measure the length, width and average depth of the shallow part and use that to calculate the volume of the shallow part. Do the same for the deeper part, and add up both volumes to get the total volume of the pool.

A note of warning: The depth of the swimming pool means the depth of the water it contains; do not measure the depth of the container itself. Doing so will result in inaccurate calculations or the risk of adding the wrong quantity of chemicals to the water . If the water reaches the brim of the pool, then measuring with either depth may be okay.

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How To Calculate The Volume Of An Irregular Oblong Or Kidney Shaped Pool

The volume of a oblong or kidney shaped pool is a little more complicated. You can calculate its volume by multiplying the length in feet times times .45 times the average depth in feet times 7.48.

volume = length × × .45 × depth × 7.48

The first part × .45) is used to find the area, and then the volume is found by multiplying by the depth. Like before, multiplying by 7.48 finds the number of gallons in the pool.

Done With Numbers Call In A Pro

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Are you at the point where if you have to do one more math problem, youre going to just cover the pool and call it a year? We hear you.

If a pool volume chart or pool calculator doesnt work properly for you because you have an unusual pool shape, or you just want everything to be accurate to the decimal point, you can have a pool professional take the measurements and figure out the volume for you.

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