A typical cup of coffee contains about 95 to 100 milligrams of caffeine for an 8-ounce (240 ml) serving. This amount can vary depending on the type of coffee bean, brewing method, and cup size. For example, brewed coffee commonly contains around 95 mg in an 8-ounce cup, espresso has about 70 to 127 mg per shot, and decaffeinated coffee contains much less, typically 2 to 15 mg per cup. Cold brew coffee tends to have a higher caffeine content due to longer steeping times. Overall, caffeine content in coffee can range broadly, but the average brewed cup is about 95 to 100 mg caffeine.
