diff --git a/layouts/window-auto b/layouts/window-auto
new file mode 100755
index 0000000..f2f955e
--- /dev/null
+++ b/layouts/window-auto
@@ -0,0 +1,28 @@
+#!/usr/bin/env zsh
+
+cols=`tput cols`
+lines=`tput lines`
+width=$(( $cols / 2 )).0
+height=$lines.0
+ratio=$(( ($width / $height) * 100 ))
+
+# echo "size: ( $width,$height ) ratio: $ratio"
+
+if [[ $cols -lt 140 ]] && [[ $lines -lt 70 ]]; then
+  # terminal is too small
+  exit
+fi
+
+if [[ $ratio -ge 100 ]]; then
+  # terminal is wide or square
+  if [[ `tput cols` -gt 230 ]]; then
+    # terminal is wide and large
+    `dirname $0`/window-wide-right
+  else
+    # terminal is wide and small
+    tmux split-window -h -l 50%
+  fi
+else
+  # terminal is tall
+  `dirname $0`/window-tall
+fi