How much caffeine is in a tea bag?

A cup of tea typically contains between 30 and 50mg of caffeine depending on what tea is in the blend, the origin of the tea and the drop weight of the tea bag (a bag with 3.125g of tea will have more caffeine than a bag with 2g). The caffeine released in the first minute is the highest and then gradually diminishes.

Will 2 tea bags double the caffeine?

A green tea may have as much caffeine as a black tea, and two black teas from the same region might have totally different caffeine levels. … Steep an English breakfast tea for one minute and you may get 14 milligrams of caffeine in your cup; steep the same amount for five minutes and that concentration can double.