Here are the caffeine approximations in coffee based on the USDA standard nutrition database.
- 8 fl oz coffee = 95 mg
- 8 fl oz decaf coffee = 2.4 mg
- Shot of espresso = 63 mg
- Shot of decaf espresso = 0.3 mg
- Light Roast Coffee contains approximately 1.13 % caffeine
- Medium Roast Coffee contains approximately 1.17% caffeine
- Dark Roast Coffee contains approximately 1.08% caffeine