Pool Calculator: Calculate Your Pool Volume and Costs in Seconds

If you are looking to find the volume of your pool, this is the tool for you. Simply enter the width, length, and depth of your pool and Pool Calculator will instantly determine the volume.

A pool calculator sounds like something only an engineer would need. However, you might be surprised by how many people want to have an idea of how much their pool would cost to have built.

Determining how many gallons of water are in your pool is essential for deciding the appropriate amount of pool chemicals to add, the size of the pool heater, and various other things.

You have probably heard that building a pool is expensive, but just how expensive? This blog will walk you through it. To get started, you can use the pool calculator provided below.

Pool Volume Calculator

With this pool volume calculator, you can calculate the number of gallons in your swimming pool. It’s actually pretty straightforward. Just enter your pool dimensions and choose your pool type, and you’ll get an accurate estimate.

Pool Volume Calculator

Pool Basics Volume Calculation

Pool with Depth Marker to check pool volume

There are a few fundamental criteria that you must consider while determining the volume of the pool.

  • Length
  • Width
  • Depth
  • Diameter
  • Radius
  • Pi (3.14 constant)

You can multiply the length and width of your pool to give you the pool surface area that your pool occupies. To get the volume of the pool, all you need to do is add the depth in the equation.

Rectangular Pool Volume

A rectangular pool in the backyard with plants

It’s pretty straightforward to get the volume of a rectangular pool, but the equation may vary depending on the slope of the bottom of your pool.

Suppose your swimming pool has a constant depth across all sides and bottoms. You can calculate the pool’s surface area by (length x width) x depth, then multiply by 7.5 to get the volume in gallons.

Length x width x depth x 7.5 = volume (gallons)

But, not all pools are made simple. Some may have a shallow end, while others may have a deep end. To get the accurate volume of the pool with variable depths, you first have to calculate the average depth of the swimming pool. You can calculate this by adding the deeper end and the shallow end and dividing it by 2.

(deep end depth + shallow end depth) / 2 = average pool depth

Then the next equation is:

Length x width x depth x 7.5 = volume (pool gallons)

Round Pool Volume

round pool near the sea

When dealing with round pools, you need to calculate the volume of the pool circumference first. To get the radius of the pool, divide the diameter by 2. Once you have the radius and depth, here’s the equation. 

3.14 × radius2 × depth × 7.5 = volume (pool gallons)

Free-Form Pools

a free-form pool in the backyard

Freeform pools are extremely popular and aesthetically pleasing, but calculating the water volume can be entirely complicated. To calculate the volume of water, cut your pool dimensions down into smaller areas.

If you have a kidney-shaped pool, cut it down into two circles. This way, you can use our accurate calculations above to measure the volume of the two circles and then add the result together to get the overall volume of the free-form pool. 

Bottom Line to Pool Calculator

A pool volume calculator is a handy tool for homeowners trying to estimate how much water their pool might hold.

This tool takes the measurements of the dimensions of your swimming pool and produces an accurate estimate, giving you crucial information about water supplies for your pool.

We hope you’ll find this tool useful in your pool ownership experience. You will find the following articles about swimming pools to be helpful and provide you with important information about ensuring a safe and clean pool for your family. Do not miss them! Learn more about pools here.

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About the author

Ruben Anderson

I consider myself a pool and gadget geek. On thepoolpassion.com I review anything techie that helps me run a pool more effectively and efficiently.

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