Yes, coffee generally has more caffeine than tea, but the exact amount depends on the type of coffee and tea and how it's prepared. Caffeine levels in coffee and tea Coffee A regular brewed cup of coffee contains between 95–200 milligrams of caffeine. Espresso and instant coffee have less caffeine. Black tea An 8-ounce cup of black tea contains around 50 milligrams of caffeine. Green tea An 8-ounce cup of green tea contains around 30 milligrams of caffeine.