diff --git a/app/helpers/projects_helper.rb b/app/helpers/projects_helper.rb
index 3720b0085e..f17d02a7a3 100644
--- a/app/helpers/projects_helper.rb
+++ b/app/helpers/projects_helper.rb
@@ -200,12 +200,8 @@ module ProjectsHelper
   end
 
   def repository_size(project = @project)
-    "#{project.repository_size} MB"
-  rescue
-    # In order to prevent 500 error
-    # when application cannot allocate memory
-    # to calculate repo size - just show 'Unknown'
-    'unknown'
+    size_in_bytes = project.repository_size * 1.megabyte
+    number_to_human_size(size_in_bytes, delimiter: ',', precision: 2)
   end
 
   def default_url_to_repo(project = @project)