how much caffeine in starbucks regular coffee?
Decaf coffee from Starbucks contains 15–30 mg of caffeine, depending on cup size. Bottom Line: An 8-oz, brewed coffee from Starbucks contains 180 mg of caffeine. A single espresso and espresso-based drinks contain 75 mg, while an 8-oz cup of decaf coffee contains about 15 mg of caffeine.