Two. Depending on the situation, maybe two shots, two coffees, two decafs, or two hours.

But definitely not after 2pm. I need to sleep later.

fwiw I don’t think 4-6 shots is too far out of the norm if not daily. Double-shots are not uncommon, and 2-3 of those on occasion seems rather reasonable. I just would hope you drink a good amount of water the rest of the day. Now if you mean that you downing 6 double-shots… are you Dan Campbell?

30g of beans once a day. 4-6 shots would kill me.

I have one cup first thing in the morning and that’s it lol if I drink more caffeine than that I’ll feel like I want to start crawling up the walls!

I drink 1-2 Americano’s every day. Double shot of course. When I was drinking drip I would drink 8-10 cups which was a lot. Getting an espresso machine has definitely helped me cut back

I rarely drink coffee on my days off, when I work I bring a 20oz mug of drip coffee with me. At my old job, I’d probably polish of a pot or two to myself most days, mostly because walking back to the break room and brewing a pot when it was empty was a good way to avoid actually working that no one ever batted an eye at.

5 cups of half calf over 3-4 hours

Most days I don’t drink coffee, but on days I do it’s usually around 6+ cups.

One pourover in the morning, one pourover after lunch. Under exceptional circumstances, a double espresso in the afternoon. Very rarely if ever more than that.

About 500 mL (~ 2 cups) drip coffee over the course of 4 hours.

2 espressos per day. Sometimes 3.

Comparison is irrelevant. It’s entirely up to your response to those stimulants, short- and long-term. For starters, the half-life of caffeine can be 3-8 hours in healthy adults, which is completely unrelated to sensitivity, which really matters, for which there is no objective test.

I used to drink up to 3 shots of espresso per day. Then I got my first amalgam filling, and coffee started causing muscle tension that I had to medicate. Over the years, my tolerance deteriorated, irritability got worse, and now more than a year after removing that amalgam, I still can’t handle any amount of coffee daily. One shot makes me feel worse. Quarter shot stimulates but makes me angry, and then ruins the next night’s sleep.

I don’t know what’s broken, but having had chronic inflammation and likely malabsorption in the small intestine because of slow (IgG) food allergies even before the amalgam is probably related. The gut is fine now, been for a year, after two decades of IBS. I can have a cup of decaf per day for a week before the muscle tension gets bothersome.

There’s a book “Amalgam Illness: diagnosis and treatment” which helped a bit. Mainstream healthcare was useless against the IBS.

In a day, or at a single time?

I think that a typical cup for me is 16oz, and I usually have 3-4 in a day (usually one at home, and 2-3 at work). My spouse’s cup is 20oz, but they only have one in a day.

3 or 4 double shots in the morning. Drip and (especially perc) coffee delivers more caffeine, mostly due to volume. I’ve knocked myself into jitters with drip on numerous occasions. Never done this with espresso.

You’re fine. I’ve had baristas balk at a quad shot right after serving someone a 16oz. drip without even blinking. There’s probably as much if not more caffeine in the 16oz. drip.

Maybe a cup or two a day. If that.

This is more than I drink on a daily basis but I don’t think it’s too crazy. I usually drink 2-3 cups of drip coffee on weekdays and 4 espresso shots on weekend days.