Is Tea Caffeine Healthier than Coffee Caffeine? Tea caffeine levels are generally lower than coffee caffeine levels. A 5-oz cup of coffee contains about 80 mg of caffeine, while tea caffeine ranges from 15 to 50 mg per tea bag. Based on lists and charts on caffeine levels in tea and coffee, an 8-oz cup of brewed coffee has about 80-135 mg of caffeine while the same amount of drip coffee has about 115-175 mg. A 2-oz serving of espresso has about 100 mg of caffeine, while an 8-oz cup of instant coffee has about 65-100 mg of caffeine. Meanwhile, an 8-oz serving of black tea contains about 50-65 mg of caffeine compared to green tea, which has about 15-35 mg. White tea has even lower amounts of caffeine, ranging from 10 to 25 mg. As shown above, it is clear that the amount of caffeine in tea is lower than that of coffee. However, some experts say that there are many factors that dictate the amount of tea caffeine. As mentioned earlier, black tea has the highest amount of caffeine while white tea has the lowest. With this in mind, teas with darker colors tend to have more caffeine than lighter ones. However, there is an exception to this rule. Some tea aficionados argue that there are also lighter green teas that have more caffeine compared to darker ones. An example of this is Gyokuro, one of the Japanese green teas, which has more caffeine than darker green teas. They say that the amount of tea caffeine is actually dependent on the amount of time allotted for brewing. For example, black tea, as mentioned earlier, contains the highest amount of caffeine among the types of tea and it is also the type of tea that has the longest steep time or the amount of time allotted for brewing (3-5 minutes). This association of brewing time and the amount of caffeine also applies to coffee. Another thing to be considered is the number of times the tea leaves are used. If the tea leaves are used more than once, the amount of tea caffeine tends to decrease. In fact, some people say that the first infusion may be thrown out if tea with lesser amount of caffeine is desired. The bottom line is coffee has higher amounts of caffeine than tea. If there is a need to avoid the negative effects of caffeine, tea can be a better option, considering that there are other benefits in tea other than having lesser amounts of caffeine.