There's a huge variance around this though. Size of cup, amount of ground coffee used, variety of coffee (robusta has much higher caffeine than arabica), how roasted it is... It might be around 150 mg per cup, but could easily be nearly half or nearly double that.

In my experience, judging from the subjective felt effect when drinking it, the amount of caffeine in filter coffee can vary by a factor 3x depending on brewing technique. I just came back from the U.K. and the hotel breakfast coffee there did less for me in three cups than a single cup from my Fellow Aiden coffee brewer at home. I used to cold brew coffee but had to stop because the apparently higher caffeine content gave me heart problems.

Not every moka is the same size and you can also put different quantities of coffee and water to change the flavor, which is what I do and idk about ya, i am not gonna measure it, too much of an hassle otherwise, especially if i am sleepy and i must go to work