People make this strong coffee beverage by forcing hot water or steam through very fine coffee grounds.

EspressoĪ single 1-oz shot of espresso contains approximately 63 mg of caffeine. Making this type of coffee involves adding hot water to instant coffee powder or granules. A typical 8-oz cup of regular instant coffee contains about 62 mg of caffeine. Instant coffee usually contains less caffeine than freshly brewed coffee. This is a different process than the way to make iced coffee, which simply involves serving brewed coffee over ice. To make it, a person needs to steep coffee grounds in water at room temperature for 8–24 hours. Cold brewĪ 2017 study found that a 12-oz cup of cold brew coffee can contain between 153–238 mg of caffeine.Ĭold brew coffee is made without heat.

For instance, an average 8-oz cup of brewed decaf coffee contains about 2 mg of caffeine. Decaffeinated brewedĭespite its name, decaffeinated, or decaf coffee, still contains some caffeine. People can make brewed coffee in a variety of ways, such as using a filter, a percolator, or a French press. This mixture usually sits in a paper, metal, or plastic filter that separates the coffee grounds from the brewed liquid. Brewed coffeeĪn 8-oz cup of brewed coffee typically contains 80–100 mg of caffeine.īrewed coffee involves brewing ground coffee beans in hot water. The following list summarizes the caffeine content of some of the most common types of coffee. Different types of coffee contain varying amounts of caffeine.

Cold brew coffee caffeine content