How much caffeine is there in a shot of espresso versus cup regular coffee?

It's tricky to give an exact caffeine amount for a shot of espresso versus a cup of regular coffee because there are several factors that affect caffeine content, including:

* Type of coffee bean: Some beans naturally have more caffeine than others.

* Roast level: Darker roasts tend to have slightly less caffeine than lighter roasts.

* Brewing method: Different methods extract caffeine differently.

* Size: A "cup" can be many different sizes.

Generally:

* Espresso shot (1 oz): Contains around 60-80 mg of caffeine.

* Regular coffee (8 oz): Contains around 80-100 mg of caffeine.

Therefore, a cup of regular coffee usually has a slightly higher caffeine content than a single shot of espresso.

Important Note: These are rough estimates. The best way to know the caffeine content of your specific coffee is to check the packaging or ask your barista.