Oval Pool Volume Calculator in Liters and Gallons

How much water your oval pool can hold? Simply enter your swimming pool’s length, width, & depth into our oval pool volume calculator for an instant, accurate result in gallons, liters, cubic ft.

How to Calculate the Volume of an Oval Pool

An oval pool is shaped like a long circle. To find out how much water it holds, you just need a few measurements and a simple formula. I’ll guide you through it step-by-step.

Understanding Important Fundamentals

Here are some important fundamentals that will help you to measure the oval pool volume:

1. Length of the Pool

• The longest straight distance from one end to the other.

2. Width of the Pool

• The widest point from side to side.

3. Depth of the Pool

• How deep the pool is from top to bottom.
• If the depth is the same everywhere, you only need one number.
• If there’s a shallow and deep end, you’ll need both to find the average.

4. Unit of Measurement

• Make sure all measurements are in the same unit (feet, meters, etc.)

5. Conversion Factor

To convert cubic feet to gallons:

• 1 cubic foot = 7.48 US gallons

Or cubic meters to liters:

• 1 cubic meter = 1,000 liters

Steps to Calculate Oval Pool Volume

Step 1: Measure the Length

Use a measuring tape to find the longest distance across the pool.

Example:

• The pool is 25 feet long.

Step 2: Measure the Width

Now, measure how wide the pool is at its widest point.

Example:

• The pool is 15 feet wide.

Step 3: Measure the Depth

Check how deep the pool is.

• If it’s the same depth all around, use that.
• If it has a shallow and deep end, add them together and divide by 2 to get the average.

Example:

• Shallow end = 4 feet
• Deep end = 6 feet

Average Depth = (4 + 6) ÷ 2 = 5 feet

Step 4: Use the Formula to Find Volume in Cubic Feet

The formula for an oval pool is:

Volume = 3.1416 × (Length ÷ 2) × (Width ÷ 2) × Average Depth

Explanation:

• Divide the length and width by 2 to get the radius values.
• Multiply them together.
• Multiply by 3.1416 (π).
• Then multiply by the average depth.

Step 5: Convert Cubic Feet to Gallons

Use the conversion factor:

1 cubic foot = 7.48 gallons

Now multiply:

1,472.62 × 7.48 = 11,020.2 gallons

Your oval pool can hold about 11,020 gallons of water.

10 Common Inground Oval Pool Sizes & Water Volume In Gallons

Length × Width (ft)	Approx. Gallons (5.5 ft avg. depth)
12′ × 24′	9,350
15′ × 30′	14,300
16′ × 32′	16,660
18′ × 33′	19,380
18′ × 36′	21,150
20′ × 40′	26,000
21′ × 41′	28,000
24′ × 44′	34,500
25′ × 45′	36,800
30′ × 50′	48,825

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