Daily How Much

A 12-oz can has 54 mg of caffeine, while a 20-oz bottle has 91 mg.

A 12-oz Diet Coke has 46 mg of caffeine, while an 8-oz brewed coffee often lands near 95 mg.

A 12-oz can has 41 mg of caffeine, while a 20-oz bottle has 68 mg; the number changes with serving size, so the label is the final word.

Most decaf coffee still has about 2–10 mg of caffeine per 8-oz cup, with espresso and some pods sometimes landing higher.

Most decaf coffee lands around 2–5 mg of caffeine per 8 oz cup, with espresso-style drinks and strong brews sometimes running higher.

For most adults, more than 400 mg of caffeine a day starts to raise the odds of side effects, poor sleep, and shaky jitters.

Many obstetric and public-health sources cap caffeine at 200 mg per day during pregnancy, counting coffee, tea, soda, chocolate, and caffeine-containing meds.

For most healthy adults, going past 400 mg of caffeine in a day is the point where side effects and risk climb fast.

A brewed coffee often lands around 80–100 mg of caffeine per 8 oz, while black tea often lands around 40–60 mg, with steep time and serving size driving the

A decaf Americano still contains caffeine, usually in the single digits to a few dozen milligrams, based on shots and beans.