How to display pictures' aspect ratios in a directory view?

[rsbrux]

Since I am trying to crop most of my photos to 16:9 (for display on my HTPC monitor) it would be helpful to have an overview of the aspect ratios of pictures in a given directory.
I couldn't find aspect ratio in Windows 10 properties and I haven't been able to get it in XnView MP's thumbnails. I do have a custom label in XnView MP displaying width, height and file size, but custom labels apparently can't do arithmetic (e.g. width/height) and I am too lazy to do the arithmetic in my head for each photo.
Does anyone know of a way to get such a directory view, whether in Windows Explorer, XnView MP or some other photo browser?