Espresso has more caffeine per ounce, but the tiny serving means a regular coffee usually has more caffeine total.
Mayo Clinic's chart: a 1-ounce espresso shot is about 63 milligrams; an 8-ounce brewed coffee about 96. The FDA puts a 12-ounce brewed coffee at 113 to 247 milligrams depending on beans and brew. Espresso's intense taste is concentration, not total dose. Count shots and cups, and keep all sources inside the FDA's 400 milligram daily guide for most adults. If you are caffeine-sensitive, even a single late-afternoon shot can cost you sleep.
What to do
Common questions
Does espresso have more caffeine than coffee?
Concentrated, yes; stronger overall, no. Espresso packs more caffeine per ounce, but you drink so little of it that a regular coffee wins the totals. Mayo Clinic's caffeine chart puts a 1-ounce espresso shot at about 63 milligrams of caffeine and an 8-ounce brewed coffee at about 96 milligrams, and the FDA's broader data puts a 12-ounce regular brewed coffee anywhere from 113 to 247 milligrams depending on the beans and brew. So a single espresso is roughly two-thirds of a small cup of coffee, and a double-shot latte lands around 126 milligrams, comfortably below a large drip. The confusion comes from taste: espresso tastes intense and bitter, which reads as more caffeine, but intensity is about concentration, not totals. What actually moves your numbers: drink size, number of shots, and brew strength. If you are watching intake, count shots and cups, not how strong it tastes, and remember the FDA's daily guide of 400 milligrams for most adults covers all sources, including the afternoon tea and the cola. Sensitivity still rules: if caffeine hits you hard, a 4pm double espresso can wreck your night even though it is under the numbers.