Approximately 140mg of Caffeine in a Medium Brewed Coffee

The amount of caffeine in a standard medium brewed coffee is around 140 milligrams. This figure can vary slightly depending on the specific brewing method and bean roast. For reference, a small would contain less, and a large would contain more. Understanding these general ranges helps in managing daily caffeine intake.

Caffeine Content by Size

Small (10 oz): Roughly 100 mg Medium (14 oz): Around 140 mg Large (20 oz): Approximately 190 mg

Factors Influencing Caffeine Levels

Several factors can affect the final caffeine content of a cup of coffee: Bean Type: Different coffee beans naturally have varying caffeine levels. Roast Level: Lighter roasts tend to retain slightly more caffeine than darker roasts, although the difference is often minor. Brewing Method: Drip coffee, for instance, typically yields a consistent caffeine level, while methods like espresso concentrate caffeine. Serving Size: This is the most significant factor; larger volumes naturally contain more caffeine.

Caffeine Comparison: Coffee vs. Other Beverages

This table provides a general comparison of caffeine content in common beverages.

Beverage	Typical Serving Size	Approximate Caffeine (mg)
Brewed Coffee	12 oz	140
Espresso (single shot)	1 oz	64
Black Tea	8 oz	47
Cola Soda	12 oz	30