Calculating Volume of Irregular Pool

[pool_novice]

Does anyone have any tips for how to calculate the volume of an irregular-shaped pool?

I've included a satellite image of it here. Here are rough measurements:

• 30' length from end-to-end (longest point)
• 10-13.5' across at the narrowest and widest points
• Shallow party pool - only about 3-5' deep
  • 3' deep on either end
  • Gradually slopes to 5' in the center

The previous pool guy estimated the volume between 15-17k gallons, but Pentair's calculator for an oblong pool (closest option) only estimates it at about 9400 gallons. All the curves and gradual slope from 3' to 5' and back to 3' are making this a particularly challenging math problem for me.

 

[JamesW]

Maybe break it down into standard shape like circles and rectangles.

Below is 3 circles and one rectangle.

Figure out the diameter of each circle and the dimensions of the rectangle.

Multiply the area of each by the depth of each section.

 

[Newdude]

This Irregular shape calculator is cool. Take a bunch of measurements of the pool then go to the calculator.

Click the up arrow on the left side of the graph to add as many points as you need to make the basic curves and it'll nail the surface area. The grid layout will help with the measurements.

Then you can guesstimate your average depth to be fairly close. Dial it in the rest of the way with chemical additions.

 

[TinFoilHat]

If there is any chance that you will be draining and refilling your pool then you can measure how many gallons run through your water meter to determine it.