Perhaps you do not want to use the points for a Marriott hotel stay. But if you do, I would recommend going to the AmEx website for the points and searching by hotel and then brand. It will bring up everything available for spending the points on Marriott stays. This is better than the conversion chart unless none of the choices work for you. If you want the points to go to Marriott for some other reason, then the conversion may be the only way unless others are aware of additional options.