Daily How Much

Decaf coffee still carries caffeine—often 2–15 mg per 8 oz cup, with some cups running higher.

Cold brew caffeine can land anywhere from about 90 mg to 300+ mg per 12 oz, based on the recipe, the beans, and how the drink is diluted.

Most pregnancy guidelines cap caffeine at 200 mg per day, which is often around one 12-oz brewed coffee.

A typical 8-ounce mug of brewed green tea lands around 30–50 mg of caffeine, with steep time, leaf dose, and tea style driving the swing.

A 12-oz (355 mL) can of Diet Coke has 46 mg of caffeine in the U.S.

A standard 12-oz (355 mL) can of Coca-Cola contains about 34 mg of caffeine.

A standard 12-oz can of Coca-Cola contains 34 mg of caffeine.

A 12-fl-oz can of Diet Pepsi has 35 mg of caffeine, and bigger bottles scale up with the serving size.

A standard 20-oz Dr Pepper bottle lists 68 mg of caffeine, while a 16.9-oz bottle lists 58 mg.

A 20-oz Coca-Cola Original bottle has 57 mg caffeine; a 12-oz can has 34 mg.