diff --git a/lib/cask/cli/cleanup.rb b/lib/cask/cli/cleanup.rb
index 4d2ac5ce30..3de2664328 100644
--- a/lib/cask/cli/cleanup.rb
+++ b/lib/cask/cli/cleanup.rb
@@ -49,6 +49,11 @@ class Cask::CLI::Cleanup
     cache_incompletes(outdated) + cache_completes(outdated)
   end
 
+  def self.space_in_megs(files)
+    bytes = files.map { |f| begin File.size(f); rescue; 0; end }.reduce(&:+) || 0
+    sprintf '%0.2f', bytes / (1024.0 * 1024.0)
+  end
+
   def self.remove_dead_symlinks
     ohai "Removing dead symlinks"
     to_delete = dead_symlinks
diff --git a/lib/cask/cli/doctor.rb b/lib/cask/cli/doctor.rb
index 483d5cc35e..3c106774ac 100644
--- a/lib/cask/cli/doctor.rb
+++ b/lib/cask/cli/doctor.rb
@@ -11,6 +11,7 @@ class Cask::CLI::Doctor
     ohai 'Homebrew Origin:',                                 render_with_none_as_error( homebrew_origin )
     ohai 'Homebrew-cask Version:',                           render_with_none_as_error( HOMEBREW_CASK_VERSION )
     ohai 'Homebrew-cask Install Location:',                    render_install_location( HOMEBREW_CASK_VERSION )
+    ohai 'Homebrew-cask Cached Downloads:',                     render_cached_downloads
     ohai 'Homebrew-cask Default Tap Path:',                           render_tap_paths( fq_default_tap )
     ohai 'Homebrew-cask Alternate Cask Taps:',                        render_tap_paths( alt_taps )
     ohai 'Homebrew-cask Default Tap Cask Count:',            render_with_none_as_error( default_cask_count )
@@ -160,6 +161,18 @@ class Cask::CLI::Doctor
     copy
   end
 
+  def self.render_cached_downloads
+    files = Cask::CLI::Cleanup.all_cache_files
+    count = files.count
+    space = Cask::CLI::Cleanup.space_in_megs files
+    [
+     HOMEBREW_CACHE,
+     HOMEBREW_CACHE_CASKS,
+     count.to_s.concat(" files").concat(count == 0 ? '' : %Q{ #{error_string %Q{warning: run "brew cask cleanup"}}}),
+     space.to_s.concat(" megs").concat(count == 0 ? '' : %Q{ #{error_string %Q{warning: run "brew cask cleanup"}}}),
+    ]
+  end
+
   def self.help
     "checks for configuration issues"
   end