Circle Pool Volume Calculator

How much water does your kidney-shaped swimming pool hold?
Use our pool volume calculator to quickly find out by choosing your pool's shape, dimensions, and depth. Check out all shapes and sizes at our Pool Volume Calculator

Calculate Your Circle Pool's Size:

Calculating Pool Volume Essentials:

To determine the volume of your pool, you'll need to compute the surface area and average depth of your pool. This requires a few fundamental measurements:

Length (L)
Width (W)
Depth (D) or Height (H)
Diameter (d) (for circular pools)
Radius (r) (for circular pools)
The constant Pi (π ≈ 3.14)

For a rectangular pool, you can find the surface area by multiplying the length and width. When you include the depth (or height), you can perform a basic volume calculation.

Another critical element in this calculation is the fact that one cubic foot of water holds approximately 7.5 gallons. To determine the total gallons your pool can hold, simply multiply your final cubic foot measurement by 7.5.

How to Calculate Pool Volume Step-By-Step for a Circle Pool:

Step 1: Gather Information
- Measure the diameter (D) and depth (D) of your circular pool in feet.
Step 2: Calculate Volume
- To find the volume in cubic feet, use the formula: Volume = π x (D/2)^2 x Depth (D).
- Square the radius (D/2), multiply it by π (approximately 3.14159), and then multiply by the depth to get the volume in cubic feet.
Step 3: Convert to Gallons
- Convert cubic feet to gallons by multiplying the cubic feet value by 7.48052.
- Volume (gallons) = Volume (cubic feet) x 7.48052.

Common Pool Sizes

Check the average gallons that the most common pool sizes and shapes hold for in-ground and above-ground pools.

Common Above-Ground Pool Sizes
	48" Wall Height	52" Wall Height
Pool Size	Gallons	Gallons
15' Round	5,300	5,800
18' Round	7,600	8,300
20' Round	9,400	10,200
24' Round	13,600	15,300
27' Round	17,200	18,600
28' Round	18,500	20,000
11x25 Oval	6,500	7,000
15x25 Oval	7,800	8,400
15x30 Oval	8,900	9,600
18x33 Oval	10,600	11,500
18x38 Oval	14,000	15,200

Common Inground Pool Sizes
Average Wall Height
Pool Size	Gallons
12x24 Rectangular	10,800
16x32 Rectangular	19,200
16x36 Rectangular	21,600
18x36 Rectangular	24,300
20x40 Rectangular	30,000
16x32 Oval	17,000
18x36 Oval	21,700
20x40 Oval	26,800
17x33 Grecian	19,700
17x37 Grecian	22,200
20x36 Grecian	24,300
20x44 Grecian	30,300
16x30 Kidney	14,900
16x34 Kidney	16,500
20x38 Kidney	20,200