How Much Water Does An Average Pool Hold

Need to figure out how many gallons of water are in your pool? Just plug in your pool'due south measurements into our pool volume calculator below.

Pool Volume Calculator

Puddle Volume Calculator Click on your puddle shape to calculate the volume of h2o.

rectangle pool Rectangle

rectangle pool Round

Exist sure to mensurate from the depth of your water, not the height of the wall or the depth of the puddle. You want to know how much water is in your pool, and it'southward probably not filled upwards to the elevation.

Note: The calculator rounds up decimal points, which makes it easier to summate chemical dosing. But the rounding isn't plenty to throw off your water chemistry calculations.

If you have a more complicated shaped pool, you lot'll need to run a few other calculations. Nosotros cover how to calculate the volume of an irregular-shaped pool at the end of this guide.

Pool Volume Reference Chart

You tin apply the pool volume reference chart beneath to speedily summate the volume of these mutual pool sizes.

Notation: These are estimates. You'll always get more authentic results if you measure your pool yourself. And always measure out the depth of your water, not the height of your wall.

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The Pool Care Handbook

How to Calculate Puddle Volume Step-Past-Step

If y'all demand to calculate the volume of an irregular-shaped pool or you're however feeling dislocated, bank check out our video that walks you through how to calculate the volume of water in your pool. Or keep reading for a complete walk-through on these calculations.

Puddle Book Adding Basics

To get your pool's book, you need to summate your puddle'due south area and average depth. And to exercise that, you'll need a few bones metrics:

Length (Fifty)
Width (W)
Depth (D) or Superlative (H)
Diameter (d) (for circular pools)
Radius (r) (for circular pools)
Pi (iii.14 constant)

Multiply the length and width to get the surface surface area of a rectangular pool. And so throw in your pool'south depth and you'll get basic volume adding.

Another central office of your equation: one cubic foot of water contains seven.5 gallons. And then in society to figure out how many gallons your pool holds, you'll multiply your terminal cubic foot measurement by 7.5 to notice the volume of your puddle.

Let'due south see what this looks like with different pool shapes.

Rectangular Pool Volume

How you summate your book will depend on how the bottom of your pool is laid out.

Constant Depth

The formula for finding the volume of a rectangular pool with one depth (no shallow or deep end) is L × West × D × 7.five = V (in gallons).

For example, if your swimming puddle is 32 anxiety long, 16 anxiety wide, and 4 anxiety deep:

32 × 16 × four × 7.five = 15,360 gallons

Variable Depths with a Gradual Gradient

If your rectangular pool has more than one depth (shallow stop, deep finish), you'll need to do a little more math. First, determine the pool's boilerplate depth. Add the shallow end depth to the deep end depth, and dissever by 2.

Pool Calculator Rectangle

For example, if your pool'southward shallow end is 3 feet, and the deep end is 9 feet, the average depth is half dozen anxiety.

Next, multiply your pool'southward length and width then multiply that number by the average depth. Finally, multiply that figure past 7.five to calculate the volume of the pool in gallons.

For example, if your pool is 32 feet long, 16 feet broad, and has an average depth of 6 feet:

32 × xvi × six × 7.v = 23,040 gallons

Variable Depths with a Drop-Off

If your pool has a definitive drop between the shallow and deep ends, the average depth will be different, even if the shallow terminate and deep stop are still, for instance, 3 feet and 9 anxiety, respectively.

Treat the shallow and deep ends as separate pools. This volition allow you to utilise the volume of each department using the constant depth formula.

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

Circular or Circular Pool Volume

The formula for finding the volume in gallons of a round pool is three.fourteen × r2 × D × seven.5 = V (in gallons)

Start by measuring your pool'south diameter, which is measured at its widest point across (i.e. your pool's length). Then split the bore past 2 to become the radius.

Pool Calculator Radius

Your radius squared is the radius multiplied by the radius. Finally, measure the pool's depth.

For case, if your pool's bore is xviii anxiety, your radius is 9 anxiety, and your depth is 4 anxiety:

3.14 × (9 ten 9) × 4 x 7.five = 7630.2 gallons

I rregular-Shaped Pool Volume

If you accept an oval, kidney shape, or other irregular-shaped pool, you can all the same summate the book. You'll only take to do even more math.

The easiest mode to summate an oddly shaped pool is to imagine information technology broken downwardly into two or three smaller, regularly shaped parts. Try to encounter smaller, individual squares, rectangles, or circles within the larger, irregular shape.

One time y'all've mapped them out, measure each part. Then use the same formulae to a higher place to calculate the volume in each smaller section. Finally, add all the volume figures together, and you lot'll have a pretty close approximation of the pool'south total volume.

When To Ask a Professional to Measure Your Pool

If the swimming pool volume calculator or calculations don't piece of work properly for you because you accept an unusual puddle shape, or y'all just want everything to exist more accurate, ask a puddle professional person to take the measurements and effigy out the volume for yous.

Remember, before y'all add any chemicals to your pool water, you need to know how many gallons of water are in your pool. Knowing your pool volume is not merely critical for calculation the correct amount of chemicals, information technology's absolutely necessary if yous're installing a new pool pump, puddle filter, or puddle heater. And go along these calculations handy for hereafter reference. Y'all'll need them often as a pool owner!

Matt Giovanisci is the founder of Swim Academy® and has been in the pool and spa industry since 1995. Since so, his mission is to make pool and hot tub care piece of cake for everyone. And each twelvemonth, he continues to assist more people with h2o chemical science, cleaning, and troubleshooting.

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