espresso vs Coca-Cola Classic: which has more caffeine?

espresso has more caffeine than Coca-Cola Classic on both counts: 63mg per 1 oz shot against 34mg per 12 oz can, and about 63mg per fluid ounce against 3. The serving sizes differ, so the table below shows both ways of counting.

These are different categories of drink, which changes how the caffeine arrives. Energy drinks and sodas list an exact number because caffeine is a measured additive; brewed drinks vary with the beans and the brew, so their figures are compiled averages. The numbers here are the standard published values for each.

espresso vs Coca-Cola Classic: the numbers

Sources: espresso's figure is verified in our espresso caffeine guide against USDA FoodData Central (source); Coca-Cola Classic's figure is verified in our Coca-Cola Classic guide against Caffeine Informer (source).

The concentration gap is the striking part: espresso packs roughly 22 times the caffeine per ounce. Sipping speed matters at that density; a 1 oz shot finished in minutes hits differently than the same milligrams spread over a slow cup.

Which one should you pick?

Pick Coca-Cola Classic when you want the lighter dose or a slower ramp, and espresso when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.

For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.

Related reading

• espresso: the full caffeine guide
• Coca-Cola Classic: the full caffeine guide
• The verified caffeine database

FAQ

Does espresso or Coca-Cola Classic have more caffeine? espresso: 63mg per 1 oz shot versus 34mg per 12 oz can for Coca-Cola Classic.

Which is stronger per ounce? espresso, at about 63.0mg per fluid ounce versus 2.8mg for Coca-Cola Classic.