The average caffeine content of an 8-oz, brewed cup of coffee is 95 mg
, while a single espresso or espresso-based drink contains 63 mg
, and decaf coffee contains about 3 mg of caffeine (on average).
Caffeine content can vary based on the type, serving size, and bean variety.
Up to 400 milligrams of caffeine a day is considered safe for most adults
, but people's sensitivity to caffeine varies.
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Mayo Clinic offers appointments in Arizona, Florida, Minnesota and at Mayo Clinic Health System locations to help people learn the caffeine content of their favorite drinks. Up to 400 milligrams of caffeine a day is considered safe for most adults, but people's sensitivity to caffeine varies. The actual caffeine content of a cup of coffee or tea can vary quite a bit, so it is important to use these charts as a guide.
Caffeine content for coffee, tea, soda and more - Mayo Clinic