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How Many Gallons Is My Round Pool

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How To Calculate The Volume Of A Rectangular Pool


You can find the volume of a rectangular swimming pool in gallons by multiplying the length by the width by the average depth in feet by 7.48. The formula to find pool volume in gallons is thus:

volume = length × width × depth × 7.48.

The first part of this formula determines the volume of water in cubic feet. The second part converts cubic feet to gallons there are 7.48 gallons of water per ft3 of water.

Most pools have varying depths that slope from shallow to deeper. To accurately find the volume of water, youll need to estimate the average depth. To find the average depth add the shallow depth with the deep depth, then divide by 2, e.g. ÷ 2.

How To Calculate The Volume Of An Oval Pool

You can calculate the volume of an oval swimming pool by multiplying the length times the width in feet times 3.14 divided by 4 times average depth in feet times 7.48. The formula is:

volume = length × width × ÷ 4 × depth × 7.48

The first part of this formula determines the area, and multiplying by the depth finds the volume. Again, multiplying by 7.48 determines how many gallons of water are in the pool.

Like a rectangular pool, the average depth can be found by adding the shallow and deep depths and then dividing by 2.

Kidney Or Irregular Shapes

There are two methods used to calculate the capacity of irregular shapes. First, you can imagine the pool or hot tub as a combination of smaller, regular shapes. Measure these various areas and use the calculations described previously for each square or rectangular area and for each circular area. Add these volumes together to determine the total capacity.

0.45 x x length x average depth x 7.5 = volume

The total of measurement A plus measurement B multiplied by 0.45 multiplied by the length gives you the surface area of the kidney shape. . The rest of the calculations you are now familiar with. Try this volume calculation:

0.45 x x length x average depth x 7.5 = volume

0.45 x 18 ft x 25 ft x 5 ft x 7.5 = 7593.75 gallons

Parts Per Million

One of the most important calculations you will use is parts per million . The amount of solids and liquids in the water is measured in parts per million, as in three parts of chlorine in every one million parts of water, or 3 ppm.

To help, this list shows common terms and their equivalents:

Square foot = 12 inch wide x 12 inch long

Cubic foot = 12 inch wide x 12 inch long x 12 inch high

Cubic yard = 36 inch wide x 36 inch long x 36 inch high

One cubic foot of water contains 7.48 gallons

One cubic foot of water weighs 62.4 pounds

One gallon of water weighs 8.33 pounds

One part per million represents 8.3 pounds of chemical per million gallons of water.

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Variable Depths With A Gradual Slope

If your pool has more than one depth , youll need to do a little more math. First, determine the pools average depth. To do this, add the shallow end depth to the deep end depth, and divide by 2.

÷ 2 = average D

For example, lets say your pools shallow end is 3 feet, and the deep end is 9 feet:

÷ 2 = 6 feet

Next, measure the length and width to calculate the surface area of the pool. Then youll multiply that number by the average depth to calculate the volume in cubic feet. Then multiply that figure by 7.5 to calculate the volume of the pool in gallons.

L × W × average D × 7.5 = V

Lets assume your pool is 32 feet long, 16 feet wide, and has an average depth of 6 feet:

32 × 16 × 6 × 7.5 = 23,040 gallons

How Many Gallons Are In A 15×48 Intex Pool

How Many Gallons is My Pool?

5/54,440 gallons


Subsequently, one may also ask, how many gallons is a 15×48 pool?

For example, if the pool is 21 1/2 feet in diameter, use 22 feet as the diameter. 3- For the Average Depth, it is best to use whole numbers, rounded up.How Many Gallons Of Water Are In My Swimming Pool?

21′ Round 10,407

Similarly, how do I figure out how many gallons My pool is? Length x width x average depth x 7.5 = volume 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 .

Accordingly, how many gallons is my Intex pool?

1,185 gallons

How many gallons is a 12×30 pool?

The colorful Intex Pool Set includes a 110-120V filter pump with a 530 gallon-per-hour flow rate and a water capacity at 90 percent of 1,718 gallons. An easy-to-understand setup and maintenance DVD is included with the Intex 12′ x 30Pool Set to help get you started.

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Formulas Behind Pool Calculator

So you no longer need to worry “how many gallons is my pool?”, simply apply one of the formulas:

  • Rectangular / square pool
  • volume = length * width * / 2

    The first two agents is, of course, the formula for the area of the rectangle.

  • Oval / circle pool
  • volume = * / 2

    The first part of the equation comes from a standard area of an ellipsis formula: A = * a * b, where a, b are the distances between the center and the ellipse’s vertex, lying on the horizontal and vertical axes. In our case, we have the length and width values that are the doubled distances a and b, so in the final formula, we need to divide the surface area of an oval by 4.

    You are wondering why we average the depths / 2? Have a look at the pictures:

  • Here you have the standard rectangular pool. l stands for the length of the pool, w for width, d1 is depth on one end of the pool and d2 is the depth on the other end.
  • Let’s take the right trapezoidal side of the pool. “Cut” the triangle, with one apex in the midpoint of the side, as in the picture.
  • Flip and move it to the other side to form a rectangle. The edge of the new shape is the average of two sides, so / 2.
  • The area of such a rectangle is then length * / 2. Multiply it by the third dimension – the width – and you’ll get the final formula for rectangular pool volume:

    • volume = length * width * / 2

    What About Freeform Swimming Pools

    Irregularly shaped pools are super popular and a lot of fun from a design perspective, but can be a bit of a headache when calculating pool water volume. To solve this problem, break your pool dimensions down into smaller regular chunks. If your pool is kidney shaped, break it down into two circles. From there, use the calculator above to determine the volume of the two halves and then add them together to get the full volume of the pool.

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    Sign Up For The Poolstyle E

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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.

    What Is A Pool Volume Calculator

    How To Calculate The Number of Gallons In A Pool

    To know the amount of chemicals, specifically chlorine, pH increase, shock, and any other chemicals to use for pool care that you need to put, you would have to know the water volume. If you dont have a rectangular or circular pool, you must plug the measurements into a mathematical formula to get the volume.

    But if youre not proficient in math, you can plug those numbers into a pool calculator and let it do the work. A pool volume calculator is an efficient tool to calculate pool volume or calculate gallons in pool capacity. Before you use this tool, you must measure the depth of the water using a pool water calculator instead of the height of the wall. Complex shaped pools require multiple calculations to calculate the number of gallons the pool holds.

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    Irregularly Shaped Pool Volume

    Not all pools are rectangular, square, or round. Some are oval, others are the classic kidney shape, and then some just wiggle all over the place, mimicking natural shorelines.

    If you have an irregularly shaped pool, you can still calculate the volume. Youll just have to doyou guessed iteven more math!

    The easiest way to calculate an oddly shaped pool is to imagine it broken down into two or more smaller, regularly shaped parts. Try to see smaller, individual squares, rectangles, or circles within the larger, irregular shape.

    Once youve mapped them out, measure them, and then use the same formulae that apply to those regular shapes to calculate the volume in each smaller section. Then just add all the volume figures together, and youll have a pretty close approximation of the pools total volume.

    Admittedly, this could also be known as the winging it procedure, and youre not going to get a completely accurate volume. If your pool is shaped like a fractal, your best bet is to have a professional take the measurements for you.

    What If My Dimensions Arent In Feet

    Well, the calculator does the conversions for you!

    Simply select the desired units in the drop down option and the pool calculator will do the following conversions for you:

    $$1\,foot = 12\,inches = 0.33\,yards = 30.48\,centimeters = 0.3048\,meters$$

    $$1\,ft^2 = 144\,in^2 = 0.111\,yd^2 = 929\,cm^2= 0.0929\,m^2$$

    Its that simple!

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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.

    Pool Volume Calculator: How Many Gallons Is Your Pool

    How many gallons is my pool 15 x 42

    Download our free Pool Maintenance Starter Kit and learn how to manage your pool affordably and efficiently.

    Download our free Pool Maintenance Starter Kit and learn how to manage your pool affordably and efficiently.

    Before you go around adding chemicals into your pool, you need to know the pool volume calculation basics to know how much you need to use. The more water it holds, the more youll need. Following your manufacturers instructions is the smartest idea, but you will need to know how much water your pool needs to do this.

    If youre reading this article, then theres a high probability that you want to know how to calculate your pools volume. Well, estimating the volume by eye is impossible, so you need to calculate how many gallons of water it holds.

    Keep reading, and we will show you how!

  • The Bottom Line on Pool Volume Calculators
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    What Size Pool Heater Do I Need For A 24 Foot Round Pool

    Pool Size
    Up To 10,000 Gallons Up To 21 Round or 15 x 26 Oval 50,000 BTU
    Up To 13,000 Gallons Up To 24 Round or 15 x 30 Oval 50,000 BTU
    Up To 17,000 Gallons Up To 27 Round or 18 x 33 Oval 65,000 BTU 110,000 BTU

    How do I know what size pool heater I need?

    The pools surface area divided by three gives you the minimal BTU size recommended for that particular surface area. Continuing the example above with the 15 x 30 pool, after dividing by 3, you get 150. Therefore, the minimum size heater that is recommended for a 15 x 30 pool is 150,000 BTUs.

    How many gallons of water is in a 24 foot round pool?

    Above Ground Swimming Pool Water Volumes by Size
    15 ft Round
    13,594 gals

    What size pool heater do I need for a 15000 gallon above ground pool?

    For pools under 10,000 gallons, small gas heaters like the Hayward 100K$) BTU output are suitable. Pools up to 15,000 gallons should look at the Pentair 125K BTU or higher, and 20,000 gallon above ground pools should look at the Raypak 150K BTU.

    Above Ground Swimming Pools

    Staten Island Pool and Spa offers the best in above ground pools and can supply all of your pool equipment and pool maintenance needs. Our swimming pools are easily installed above ground or semi inground so that you and your family can enjoy a full season of fun and relaxation in your new swimming pool. We carry the highest quality above the ground pools available. Our pool store is open 7 days a week.

    Whether you are looking for a good quality above ground pool at an affordable price, or our best aboveground pools on the market, Staten Island Pool and Spa has the swimming pool for you. We also offer everything you need for your new above ground pool. Use our Custom Pool Package Builder to decide which pool is right for you, where you can select a pool filter, pool liner, pool ladder, and accessories to compliment your new pool.

    You will also need pool chemicals which we offer for your convenience.

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    How Many Gallons Of Water Are In My Pool

    In order to figure out the proper doses of chemicals for your pool, you need to determine how many gallons of water it holds. To do that, you need to use a ruler to measure your pool to find out these four different numbers Length, Width, Average depth and a multiplier that determines gallons.

    So here are the formulas to figure out how much water is in your swimming pool:These formulas hold true for both Inground pools as well as above ground pools.

    Rectangular, Square or Free Form Pools:

    Length x Width x Average Depth x 7.5 = Total gallons

    For example: 16 x 32 x 4.5 x 7.5 = 17,280 Gallons

    Circular Pools:

    Diameter x Diameter x Average Depth x 5.9 = Total gallons

    For example: 18 x 18 x 4 x 5.9 = 7,646 Gallons

    Oval Pools:

    Length x Width x Average Depth x 5.9 = Total gallons

    For example: 15 x 30 x 4 x 5.9 = 10,620 Gallons

    How to determine the Average Depth of a Swimming Pool where the bottom slopes:

    Below is a side-shot of the typical inground pool that has a shallow end , then a slope that leads into the deep end .

    First measure the depth of D, the shallow end , and then measure the depth of C, the deep end . Then, add them together and divide by 2. This is the average depth of your pool.

    For example, if your shallow end D is 3, and your deep end C is 8, this would be your formula for the Average Depth:

    3 + 8 = 11

    11 divided by 2 = 5.5.

    Therefore, in this example, your average depth would be 5 1/2 feet.

    Most Common Sizes Of Inground Rectangular Pools

    How To Calculate The Volume Of A Circular Pool

    Swimming pool trick Google Maps For Gallons

    You can calculate the volume of a circular swimming pool by multiplying 3.14 times the radius in feet times the radius in feet times the average depth in feet times 7.48. Thus, the formula is:

    volume = r2 × average depth × 7.48

    The first part of this formula determines the area, and multiplying by the depth finds the volume. Multiplying by 7.48 finds the gallons of water per ft3 of water.

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    Done With Numbers Call In A Pro

    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.

    Variable Depths With A Drop

    If, instead of a gradual slope down to the deep end, your pool has a definitive drop between the shallow and deep ends, the average depth will be different, even if the shallow end and deep end are still, for example, 3 feet and 9 feet, respectively.

    It may be easier, in this case, to treat the shallow and deep ends as separate pools. This will allow you to apply the volume of each section using the constant depth formula.

    Once you have the volumes of both parts, simply add them together to determine the volume for the whole pool.

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