Gallons In A Swimming Pool

Need to figure out how many gallons of water are in your pool? Only plug in your pool's measurements into our pool volume computer below.

Pool Book Calculator

Pool Volume Reckoner
Click on your puddle shape to calculate the book of water.

rectangle pool
Rectangle

rectangle pool
Circular

Be sure to measure from the depth of your h2o, not the height of the wall or the depth of the pool. You want to know how much water is in your pool, and it'southward probably not filled upward to the height.

Note: The calculator rounds up decimal points, which makes information technology easier to calculate chemical dosing. Only the rounding isn't enough to throw off your h2o chemistry calculations.

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

Pool Book Reference Nautical chart

You can utilize the pool volume reference chart below to apace calculate the volume of these common pool sizes.

Note: These are estimates. Y'all'll always get more accurate results if you measure your puddle yourself. And always measure the depth of your h2o, not the peak of your wall.

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The Pool Care Handbook

How to Summate Puddle Volume Step-By-Pace

If you need to calculate the volume of an irregular-shaped pool or you lot're still feeling dislocated, check out our video that walks you lot through how to calculate the volume of h2o in your puddle. Or keep reading for a complete walk-through on these calculations.

Puddle Volume Calculation Basics

To become your pool's book, you lot need to calculate your puddle'south surface area and boilerplate depth. And to do that, you'll need a few bones metrics:

Length (Fifty)
Width (Westward)
Depth (D) or Elevation (H)
Bore (d) (for round pools)
Radius (r) (for round pools)
Pi (3.14 abiding)

Multiply the length and width to get the expanse of a rectangular puddle. Then throw in your pool's depth and you'll get basic volume calculation.

Another key function of your equation: ane cubic foot of h2o contains 7.five gallons. And then in order to figure out how many gallons your pool holds, y'all'll multiply your final cubic foot measurement by 7.5 to find the volume of your puddle.

Let'south come across what this looks like with different pool shapes.

Rectangular Pool Volume

How you summate your volume will depend on how the lesser 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 × Westward × D × 7.five = V (in gallons).

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

32 × 16 × 4 × vii.5 = 15,360 gallons

Variable Depths with a Gradual Slope

If your rectangular puddle has more than than one depth (shallow end, deep end), you lot'll demand to exercise a piffling more math. First, determine the pool'due south average depth. Add the shallow end depth to the deep end depth, and split by 2.

Pool Calculator Rectangle

For case, if your pool'due south shallow finish is 3 feet, and the deep stop is nine feet, the boilerplate depth is half-dozen feet.

Next, multiply your pool'due south length and width so multiply that number by the average depth. Finally, multiply that figure by 7.5 to summate the volume of the puddle in gallons.

For example, if your pool is 32 feet long, sixteen feet wide, and has an average depth of vi feet:

32 × 16 × half dozen × 7.five = 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 cease and deep end are yet, for example, three feet and 9 feet, respectively.

Treat the shallow and deep ends as dissever pools. This will allow yous to utilise the volume of each section using the abiding depth formula.

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

Round or Circular Pool Volume

The formula for finding the book in gallons of a round pool is 3.14 × r2 × D × 7.5 = V (in gallons)

Commencement past measuring your pool's diameter, which is measured at its widest point across (i.e. your pool's length). Then divide the diameter by 2 to get the radius.

Pool Calculator Radius

Your radius squared is the radius multiplied by the radius. Finally, mensurate the puddle's depth.

For example, if your puddle'due south bore is 18 feet, your radius is 9 feet, and your depth is 4 feet:

3.14 × (9 ten 9) × 4 x vii.5 = 7630.two gallons

I rregular-Shaped Puddle Volume

If you have an oval, kidney shape, or other irregular-shaped puddle, you can still calculate the volume. You'll just take to do even more math.

The easiest fashion to calculate an oddly shaped pool is to imagine it broken down into two or three smaller, regularly shaped parts. Attempt to meet smaller, individual squares, rectangles, or circles within the larger, irregular shape.

Once you've mapped them out, measure each office. So apply the same formulae above to calculate the volume in each smaller section. Finally, add together all the book figures together, and you'll have a pretty close approximation of the pool'southward total volume.

When To Ask a Professional to Measure Your Pool

If the pond pool book calculator or calculations don't piece of work properly for you lot because you have an unusual pool shape, or y'all just want everything to be more than accurate, ask a pool professional to take the measurements and figure out the volume for you lot.

Remember, before you add whatsoever chemicals to your pool water, y'all need to know how many gallons of water are in your pool. Knowing your pool volume is not only critical for adding the right corporeality of chemicals, it'south absolutely necessary if you're installing a new pool pump, pool filter, or pool heater. And keep these calculations handy for future reference. Y'all'll need them frequently as a pool owner!

The postal service Pool Book Calculator: How Many Gallons of Water Does Your Pool Hold? appeared get-go on Swim Academy®.