It depends. How deep is the pool?
Use this formula: Diameter x Diameter x Average Depth x 5.9 = Total Gallons
The pool holds 7,600 gallons of water
The average swimming pool will hold about 16,000 gallons of water. This is true for a 2700 cubic foot pool.
To give you an idea, a 36-foot by 18-foot by 5-foot deep pool takes about 24,000 gallons of water to fill.
The volume of the pool is 1385.45 cu ft for a maximum capacity of 10,364.5 gallons of water.
598 Imperial gallons, approx.
To fill it to the top you will need 9,558 gallons of water.
Depends how deep