How Much Caffeine Is In A Shot Of Espresso, Compared To A Cup Of Coffee?

Q: Does a shot of Espresso have more, or less, caffeine than a cup of brewed coffee? How much? Links would be great! I need to calculate safe levels of caffeine. Thanks!

A: I know that one shot of Expresso have much more caffeine than a cup of coffee, which is why they serve them in those tiny cups. I hope this link helps. http://en.wikipedia.org/wiki/Espresso Here's a good caffeine chart. I found it doing Yahoo search. There are lots of them. http://www.cspinet.org/reports/caffeine....I know that one shot of Espresso has less caffeine than one cup of coffee (8 0z.), but I'm not sure exactly how many milligrams it contains.