How many mg of caffeine in 8 ounces brewed coffee?

It's impossible to give an exact amount of caffeine in 8 ounces of brewed coffee because it varies greatly. Here's why:

* Type of Coffee Beans: Arabica beans tend to have less caffeine than Robusta beans.

* Brewing Method: French press, drip, and cold brew all extract different amounts of caffeine.

* Grind Size: A finer grind generally extracts more caffeine.

* Brewing Time: Longer brewing times can lead to higher caffeine content.

* Coffee Strength: Some people brew coffee stronger than others.

Generally, a standard 8-ounce cup of brewed coffee can contain anywhere from 80 to 150mg of caffeine.

For a more accurate estimate, look for the caffeine content on the coffee bag or label, or use an online caffeine calculator that takes into account brewing method and other factors.