An in-ground pool that is 40 feet by 20 feet with the shallow end being 3ft deep and the deep end being 9ft deep has a volume of approximately 35,900 US gallons. (The depth of variable depth pools is generally calculated by adding the shallow and deep ends and dividing by two).
15 foot round? About 5000 gallons, if it's four feet deep. Here's a formula for round pools: distance across*distance across*depth*5.9 for rectangles: length*width*depth*7.5 or for a deep end: length*width*((shallow end depth + deep end depth)/2)*7.5
Here's a formula for round pools: distance across*distance across*depth*5.9 for rectangles: length*width*depth*7.5 or for a deep end: length*width*((shallow end depth + deep end depth)/2)*7.5 so in your case, 18*18*4*5.9=7500 gallons
Here's a formula for round pools: distance across*distance across*depth*5.9 for rectangles: length*width*depth*7.5 or for a deep end: length*width*((shallow end depth + deep end depth)/2)*7.5 so in your case, 15*26*4.3*7.5=12500 gallons
Here's a formula for round pools: distance across*distance across*depth*5.9 for rectangles: length*width*depth*7.5 or for a deep end: length*width*((shallow end depth + deep end depth)/2)*7.5 so in your case, 21*21*4.3*5.9=11000 gallons
Here's a formula for round pools: distance across*distance across*depth*5.9 for rectangles: length*width*depth*7.5 or for a deep end: length*width*((shallow end depth + deep end depth)/2)*7.5 so in your case, 28*28*4.3*5.9=20000 gallons
You're mixing metric with imperial units??? Here's a formula for round pools: distance across*distance across*depth*5.9 for rectangles: length*width*depth*7.5 or for a deep end: length*width*((shallow end depth + deep end depth)/2)*7.5 so in your case, 16*16*4*5.9=6000 gallons=23000 liters
Average depth. Depth of the deep end @ 8'. Depth of the shallow end 3'. Add the two together and divide by 2 = average. Ken
Here's a formula for round pools: distance across*distance across*depth*5.9 for rectangles: length*width*depth*7.5 or for a deep end: length*width*((shallow end depth + deep end depth)/2)*7.5 so in your case, 16*16*4*5.9=6000 gallons=23000 liters
Some pools have a shallow end to warm up in, and then the playing area is deep, some have just deep water, some are half and half. I depends on what pool you are in.
It is not possible to give a definitive answer because the question does not state how the depth of the pool changes along its length. Many pools remain shallow for a while (to allow non-swimmers to splash about) and then increase in depth. If you can assume that the depth increases steadily, then the average depth is (3.5+12)/2 = 7.75 feet. So the volume = L*W*D = 75*50*7.75 cu ft = 29,062.5 cu ft.
They grow aout 3 feet. The size of the shallow end in most pools