Here at Coffee Detective we don’t get too excited about the exact amount of caffeine in coffee.
We just know that drinking two or three cups in the morning gives us a nice lift, sharpens the concentration and prepare us for the day.
However, for some people the minutiae of caffeine content is a subject of fascination.
So we did our usual sleuthing and found some information you might find interesting.
Here is the breakdown of caffeine in coffee, based on drinking a 7 oz cup of coffee, with variations depending on the method of preparation etc.
And here is the source of the data: Bunker and McWilliams in J.Am. Diet. 74:28-32, 1979
The variation in caffeine content between different types of coffee beans is minor, but quite interesting nevertheless.
The figures represent the percentage of caffeine content in the bean.
Source: Newsletter--Mountanos Bros. Coffee Co., San Francisco
So...if you really want to either maximize or minimize the amount of caffeine you ingest, you can do that both by how you brew your coffee, and through your choice of the coffee beans themselves.