Caffeine level in a coffee depends mainly on the type of coffee beans and the brewing method used to make the coffee. Roasting does not have a direct effect on the caffeine level. Different species of coffee plants produce different levels of caffeine in their beans. So, if you wish to keep an eye on your caffeine intake, you need to check the caffeine level while buying coffee beans. On the other hand, you can use the table below to track the effect of brewing methods on caffeine levels. By the way, the recommended daily intake of caffeine is 400 mg at most for a healthy adult. Coffee brewing methodThe amount of coffeeCaffeine contentFrench press240 mL107 mgSiphon coffeeLess than drip coffeePour-over coffee240 mL180 mgDrip coffee240 mL165 mgKopi TubrukSimilar to Turkish/Greek coffeeCowboy coffeeSimilar to Turkish/Greek coffeeTurkish/Greek coffee40 mL165 mgEspresso30 mL (one shot)64 mgMoka pot100 mL170 mgAeroPress coffee100 mL136 mg