Shooting in Dx mode

[Griffym]

This is one of those topics.Depth of field calculators make different assumptions. I do have the app for that calculator.
The following article may be of interest:

Depth of Field Myths: The Biggest Misconceptions

photographylife.com

It is possible to find articles which claim different things too. I think it depends who you believe.

 

[Griffym]

Check out this dof calculator. Keep all the same except compare a full frame like a d850 to a crop like a d500. I think the calculator assumes the size of the images will be equal.

Depth of Field (DoF) calculator | PhotoPills

This Depth of Field (DoF) calculator will help you get the creative control on the design of your photos. Decide the zone of sharpness you need to tell the story you want and get your message across.

www.photopills.com

The assumptions in the app (Yes I have it) are probably why we think differently on this. See the article on depth of field myths on my post.