diff --git a/cpu-test-by-pi.sh b/cpu-test-by-pi.sh
new file mode 100644
index 0000000..c204801
--- /dev/null
+++ b/cpu-test-by-pi.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+echo "=== Enter Pi precision to calculate (leave blank for default to 5000): "
+read -p ">>> " precision
+if [ ! $precision ]; then
+  precision=5000
+fi
+
+time echo "scale=$precision; 4*a(1)" | bc -l -q