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A 12-oz can of Barq’s Root Beer contains 22 mg of caffeine.

A plain 8-ounce mug of brewed coffee often lands near 80–100 mg of caffeine, yet your cup can swing far above or below that.

A 12-oz can of Coca-Cola has 34 mg of caffeine in the U.S., and the amount shifts with the product and the country.

An 8 oz cappuccino often lands around 60–90 mg of caffeine, set by espresso shot count, bean choice, and the café’s recipe.

An 8-oz brewed coffee commonly has about 95 mg caffeine; many cups fall in the 70–140 mg range.

An 8-oz (240 mL) cup of black coffee often lands around 80–100 mg of caffeine, with the final number shaped by bean type and brew style.

A typical 8-oz brewed coffee has about 80–100 mg caffeine, while espresso and cold brew can swing higher or lower by recipe and brand.

A standard Grande cold brew at Starbucks sits at about 256 mg of caffeine, with the Tall near 189 mg and the Venti near 323 mg.

A plain apple contains 0 mg of caffeine, so any “boost” you feel comes from carbs, hydration, and your own momentum.

A 12-oz can of Coca-Cola has 34 mg of caffeine in the U.S., which is a modest dose compared with most coffee drinks.