I was looking about online for some information for some of my patients having fatigue issues after COVID and came across a site that had an interesting scale on it. Thought to share in case anyone else found it useful. I added some links at the bottom to store for myself and in case anyone was interested in more information.
I think I am at 50 because I have been going up to level 60 for a couple of weeks and my symptoms have started to flair up. Maybe somewhere in the middle. You are supposed to ask yourself: what activity level am I able to sustain without increasing symptoms?
Click to access rating_scale.pdf
https://onlinelibrary.wiley.com/doi/full/10.1002/pmrj.12684
http://www.cfsselfhelp.org/pacing-tutorial
https://docs.google.com/document/d/1VfENjAiOBKryT-dIOFyU8CyEAAKVR5xk9WyvlZF-u4M/edit
Real Woman's Health 
Thanks for this. I’m at about 50 also.
🙂