A snippet that sums up volumes of groups in SketchUp. It also adds face areas.

Calculate Volumes in SketchUp.rb

mod = Sketchup.active_model # Open model
ent = mod.entities # All entities in model
sel = mod.selection # Current selection

# Zero all totals
t_volume = 0.0
t_faces = 0.0

# Calculate the conversion factors
cu_yd = 12**3 * 27
sq_ft = 12**2

# Iterate over the selection
sel.each { |item|

  # First check that selected item is a group
  if (item.typename == "Group")
  
    # Now make sure it has a volume (i.e. is a manifold/solid)
    if (item.volume != -1)
    
      # Add item's volume to totals
      t_volume = t_volume + item.volume
      
      # Find faces and sum up areas
      item.entities.each { |e|
        if (e.typename == "Face") 
          t_faces = t_faces + e.area
        end
      }
      
    end   
    
  end
  
}

# Finally spit out the converted results
t_volume = (t_volume/cu_yd).round(4)
t_faces = (t_faces/sq_ft).round(4)

UI.messagebox "TOTALS:\n\rVolume: #{t_volume} yd^3\n\rFace Area: #{t_faces} ft^2"

Hello Alexschreyer
But the overlap volume will not be deducted
Is there another way you can deduct overlapping volume?