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    Gallon Capacity Calculator for Structures
      NOTE: There are 7.5 gallons in 1 cubic foot  
    The symbol ' = feet   |   The symbol " = inches
      Gallon capacity of various sized structures  
      If you wish to calculate the gallon capacity of various sized structures, enter the height of the structure (feet) below.  The gallons will be calculated in the charts below.  
      feet          
      Round Structures   Vault Structures      
    Diameter Gallons
    Size Gallons
      4' DIA   26"x36"      
      5' DIA   3'x3'      
      6' DIA   31"x58"      
      7' DIA   4'x4'      
      8' DIA   4'x6'      
      10' DIA   4.5'x8.5'      
            5'x5'      
            6'x6'      
            6'x8'      
            6'x12'      
            8'x10'      
                     
      Height requirement to hold certain gallon capacity  
      If you wish to calculate the height required (feet) to hold a certain gallon capacity, enter the number of gallons below:  
    gallons
      Round Structures   Vault Structures      
    Diameter Height
    Size Height
    4' DIA
    26"x36"
    5' DIA
    3'x3'
    6' DIA
    31"x58"
    7' DIA
    4'x4'
    8' DIA
    4'x6'
    10' DIA  
    4.5'x8.5'
    5'x5'
    6'x6'
    6'x8'
    6'x12'
    8'x10'
      Gallon capacity of custom rectangular structures      
      If you wish to calculate the gallon capacity of custom sized rectangular structures, enter the appropriate dimensions below:      
    Dimension Feet
    Gallon Capacity
    Length
    Width
    Height