Does "15 foot round" refer to Perimeter, Diameter or Radius.
600mm into cubic meter
If the circumference of the round pool is 29 feet, then the volume of the pool (area times depth) is about 267.7 cubic feet.
It is 30.6 cubic feet = 190.3 Imperial gallons.
1.963 cubic feet
The volume of an area 24 feet round and 45 inches deep is: 1,700 cubic feet.
A hole 40 inches deep by 12 inches wide has a volume of: 2.62 cubic feet.
Here is a start. 1000 gal = 133.680 cubic feet/ for volume of a round pool...... remember Pi, 3.14?
At 7.48 gallons per cubic foot that is 3.14x30x30/4x52 x7.48 /12 = 22,900 gallons
1440 cubic feet of water
A 20 foot round pool has a radius of 3.2 feet. So the pool has a volume of pi*r2*h = 101.86 cubic ft approx.
The pool would contain 160.43 cubic feet of water. But I'm sorry, I only speak metric so I don't know what that is in gallons.
19,262.5 gals. calc. 3.14 x radius x radius x depth x 7.48(gals of water/cubic ft.)