How much caffeine is in different drinks?

Caffeine content varies widely among different drinks. An 8-ounce cup of brewed coffee typically contains about 95 mg of caffeine, while a similar serving of black tea has around 40-70 mg. Energy drinks can range from 80 mg to over 300 mg per serving, depending on the brand and formulation. Meanwhile, a standard cola drink usually contains about 30-50 mg of caffeine per 12-ounce can.