One coffee bean has about 6 mg of caffeine, with common ranges from 2–12 mg depending on species, bean size, and roast.

A standard 8-ounce mug of brewed black tea often lands near 30–50 mg of caffeine, with your steep and leaf dose pushing it lower or higher.

Cold brew often lands between 150–300 mg caffeine per 16 oz, based on the coffee used, the brew ratio, and steep time.

An 8-oz (237 mL) brewed coffee often lands near 96 mg of caffeine, yet one “cup” can range from mild to stout based on how it’s made.

A 12-fl oz can has 41 mg of caffeine, and bigger bottles climb in direct proportion to the ounces you drink.

A 12-oz can of Pepsi contains about 38 mg of caffeine.

A standard 8-oz cup of black coffee often lands near 95 mg of caffeine, with brew style pushing it lower or higher.

A typical 8-oz brewed coffee has about 80–100 mg of caffeine, though brew method and bean choice can swing it wide.

A 12-oz Diet Coke has 46 mg of caffeine, and bigger servings rise with the ounces.

A 12-fl-oz Diet Pepsi contains 35 mg of caffeine, with larger bottles rising by size.