A standard cup of coffee (about 8 fluid ounces) typically contains around 95 milligrams (mg) of caffeine. This can range from as low as 70 mg to as high as 140 mg, depending on factors like the coffee type, brew strength, and preparation method. To convert to grams, 95 mg is 0.095 grams of caffeine on average per cup of coffee.
Key Points on Caffeine Content in Coffee:
- Average caffeine in an 8-oz cup: approximately 95 mg (0.095 grams).
- The range can be 70 mg to 140 mg depending on brew strength.
- A 12-oz cup can have about 113 to 247 mg caffeine.
- Espresso shots have about 40-50 mg per 1-oz shot.
- Instant coffee usually has less caffeine, about 30-90 mg per cup.
- Robusta beans have more caffeine than Arabica beans, affecting the content.
- Caffeine extraction depends on brewing method, bean type, roast level, and brew time.
Thus, for practical purposes, a typical cup of coffee has roughly 0.095 grams of caffeine.
