Assuming it is round, (1) convert all measurements to feet. (2) Use the formula for the volume of a cylinder to get the volume in cubic feet. (3) Convert from cubic feet to gallons.
As an alternative, you can also convert all measurements to inches, and in the final step, convert from cubic inches to gallons.
10000
141.06 gallons
700 gallons
At 7.48 gallons per cubic foot that is 3.14x30x30/4x52 x7.48 /12 = 22,900 gallons
If you filled it all the way to the top it would be holding about 15,594 gallons of water. If you filled it to three feet deep, it decreases to around 10,200 gallons.
half a pint
10000
141.06 gallons
700 gallons
This pool can hold up to 1,689.7 gallons of water.
At 7.48 gallons per cubic foot that is 3.14x30x30/4x52 x7.48 /12 = 22,900 gallons
If you filled it all the way to the top it would be holding about 15,594 gallons of water. If you filled it to three feet deep, it decreases to around 10,200 gallons.
17,000 gallons
3416 gallons
66 gallons
A 28-foot round pool filled with 4 feet of water would contain about 18,500 gallons.
A 12 inch diameter round pipe will hold 4.89 UK gallons or 5.88 US gallons per foot.