Radiant Pools Radiant Pools Round Pool Gallons 16' 5543 18' 6963 21' 9477 24' 12378 27' 15666 30' 19388 33' 23403 Oval Pool Gallons 12' x 16' 4419 12' x 20' 5735 12' x 24 ' 7052 16' x 24' 9028 16' x 28' 10781 16' x 32' 12537