Actually your average drip coffee that you would make at home with your coffee maker or get in a coffee shop would contain more caffeine than an Americano.
Even though the Americano espresso tastes stronger you would think it would contain more caffeine than your drip coffee does.
However when you have a 12 ounce brewed cup of coffee that comes from a drip coffee maker that drip coffee would contain 120 milligrams of caffeine.
But for a 2 ounce cup of Americano espresso contains only 80 milligrams of caffeine so when you drink one shot of Americano espresso you'll be getting less caffeine than your average cup of coffee.