Coffee Caffeine Content by Chain

The U.S. FDA cites 400 mg of caffeine a day — roughly two to three reference-size brewed coffees — as an amount not generally associated with negative effects for healthy adults. Individual tolerance varies, and pregnant people are usually advised to stay under 200 mg. Always check with a clinician for your own limits.

It depends on the drink, not just the chain. Cold brew and multi-shot espresso drinks top the list at most chains because they extract more caffeine per ounce. The ranking below sorts every drink we have official data for by milligrams in its reference serving, so you can compare across Starbucks, Dunkin, Tim Hortons, and Dutch Bros directly.

Usually yes, per ounce. Cold brew is steeped long and often served less diluted, so it tends to carry more caffeine per fluid ounce than drip coffee or a single-shot latte. The “mg/oz” column below shows this concentration directly.

Each chain pours its own cup sizes — Starbucks Grande is 16 oz, while other chains’ medium or large differ. Because total caffeine depends on size, the table always shows the serving size and ounces alongside the milligrams, plus a size-independent mg/oz figure for a fair comparison.