A typical cup of coffee (about 8 ounces or 240 ml) generally contains around 80 to 150 mg of caffeine, but the exact amount can vary considerably based on brewing method, type of coffee, and serving size. Brewed coffee commonly averages around 95 to 145 mg of caffeine per cup, while espresso has more caffeine per volume but is served in smaller amounts, usually containing about 63 to 127 mg per shot. Instant coffee has less caffeine, roughly 45 to 90 mg per cup.
Caffeine Content by Coffee Type
- Brewed coffee: around 95 to 145 mg per 8-ounce cup
- Espresso: about 63 to 127 mg per 1-ounce shot
- Instant coffee: about 45 to 90 mg per 8-ounce cup
- Decaf coffee: very low, typically 2 to 15 mg per cup
Factors Affecting Caffeine Amount
- Brewing method (e.g., filter, French press, espresso)
- Coffee bean variety and roast level
- Serving size (larger cups have more caffeine)
- Coffee-to-water ratio and brewing time
This range means the caffeine content in coffee can vary widely but commonly falls in the 80 to 150 mg range per typical cup serving size.
