Daily How Much

One gram of matcha powder often lands around 20–45 mg of caffeine, and the exact hit shifts with grade, leaf age, and how packed your scoop is.

A typical 8-ounce glass of Coca-Cola has about 23 mg of caffeine, and your exact number comes down to your pour size and the product label.

A Starbucks grande cold brew lands near 256 mg of caffeine, with small swings from batch strength and how much ice ends up in the cup.

A 12-oz glass of iced tea usually has 15–45 mg of caffeine, based on tea type, leaf amount, and steep time.

A Dunkin medium latte usually lands near 166 mg of caffeine, driven by two espresso shots, with small swings by store and recipe.

Most decaf coffee has 2–15 mg caffeine per 8-oz cup, depending on brand, roast, and brew method.

A standard Dunkin iced coffee lands in the 198–396 mg range, with the jump coming mostly from cup size.

A decaf espresso shot usually lands around 3–16 mg caffeine, with the final hit set by the beans and the shot recipe.

A medium hot coffee at Dunkin often sits near 210 mg of caffeine, with size and drink style pushing it lower or higher.

A 12-fl-oz can of Diet Coke contains 46 mg of caffeine, with smaller cans close to 29 mg and larger bottles scaling up by ounces.