diff --git a/cpu_calcul b/cpu_calcul
new file mode 100755
index 0000000..08d7828
--- /dev/null
+++ b/cpu_calcul
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+if [ "$1" == "" ]
+then
+    V=" "
+else
+    V="$1"
+fi
+
+awk '{u=$2+$4; t=$2+$4+$5; if (NR==1){u1=u; t1=t;} else print ($2+$4-u1) * 100 / (t-t1) ; }' <(grep "cpu${V}" /proc/stat) <(sleep 0.5;grep "cpu${V}" /proc/stat)
+
+
+#awk '{u=$2+$4; t=$2+$4+$5; if (NR==1){u1=u; t1=t;} else print ($2+$4-u1) * 100 / (t-t1) "%"; }' <(grep "cpu${V}" /proc/stat) <(sleep 1;grep "cpu${V}" /proc/stat)