Wanting to switch from beer to spirits, just a quick question

I drink quite a lot of beer, and I’ve definitely been noticing my belly getting bigger from the amount of empty calories I’m consuming. I find I don’t eat much food either, I smoke a lot of weed as well which I find suppresses my appetite. Mixed with the 2-300 calories a beer I just drink a 6 pack a night and don’t really eat much. I was thinking of either just quitting (which is obviously the healthiest option) but also switching to something like rum and Diet Coke or whatever.

To get to the point, I was just wondering how many shots would equal the same amount of alcohol as say 6 5.5% beers? I don’t want to up my alcohol consumption, but I would like to change how I consume.