I am on my sixth beer so I don't know if you talking about a 16 foot perimeter or a 16 food diameter...
if its a 16 foot diameter then 22773.83 gallons... That's to the very top.
if its a 16 foot perimeter which would be totally illogical but oh well, it would be 2306.69 gallons... that means the diameter would of your pool would only be 5.1ish feet.
6,200 gallons.
3,398.4 gallons.
5,974 gallons.
1,770 gallons.
Three feet of water in a 12-foot round pool is about 2,550 gallons.
About 212 gallons.
About 5,310 gallons.
About 13,010 gallons.
26,550 gallons.
About 19,355 gallons.
2,360 gallons.
9,440 gallons.