diff --git a/README.md b/README.md
index 3216ad1..58f8d4d 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,7 @@ find $PATH_ANALYSE -name "Dockerfile*" | while read file; do cat $file; echo "";
 # Calculate total docker images for each metrics
 docker images --format {{.Size}} | grep MB | cut -d M -f 1 | paste -sd+ | bc
 docker images --format {{.Size}} | grep GB | cut -d G -f 1 | paste -sd+ | bc
+docker images --format {{.ID}} | xargs -n1 docker inspect | jq '.[0]["Size"]' | paste -sd + | bc | format_bytes_str
 ```
 
 ## Remove every user R packages