What would you like to do?

How many gallons are in a 4 foot by 12 foot by 18 foot round swimming pool?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

Multiply all the numbers to get the volume of the pool in cubic feet. Then divide by 7.5. That assumes the water is filled to a height of four feet. Some above-ground pools have 52" walls, which allow for a water height of 48", which is four feet. The dimensions stated above in the reworded question are for an oval pool, not a round one. I suspect the original question was for a round pool with an 18' diameter and a 4.5' wall. (The slash in 4 1/2 did not show up in the question.) If that is the case, then the answer is 3.14 times 81 times 4.5 divided by 7.5.
44 people found this useful
Thanks for the feedback!

How many gallons in a 18 foot round pool?

Impossible to answer without knowing how deep the pool is. When you know the depth (in feet), plug it into this equation: 18 x 18 x (depth) x 5.9 = # of gallons in the pool.

How many gallons of water are in a 12 foot round by 3 foot deep pool?

  This question illustrates why the standard units of measure are silly. This problem would be much easier if you had metric measures. It would be so much easier that I am