Everyone knows that regular coffee has caffeine, and so do tea, energy drinks, and soda/pop/Coke. But how do all the different drinks compare? Check the Caffeine Database and you’ll find out that not all beverages are created equal.

Here are some comparisons, with caffeine listed in ounces, caffeine amount (mg.) per serving, and then mg/oz so there’s an even basis for comparison. There are tons more on the website–please visit it.

Drink Ounces Caffeine mg/oz
Coffee (brewed) 8 107.5 13.44
Coffee (espresso) 1.5 77 51.33
Coffee (instant) 8 57 7.12
Coffee (decaf, brewed) 8 5.6 0.70
Coca Cola (classic) 12 34.5 2.88
Diet Coke 12 45 3.75
Pepsi 12 38 3.17
Diet Pepsi 12 36 3.00
Mountain Dew 12 55 4.58
Dr. Pepper 12 41 3.42
Tea (brewed) 8 47 5.88
Tea (instant) 8 26 3.25
Green Tea 8 25 3.12