how much caffeine in a black tea bag

how much caffeine in a black tea bag

What’s the amount of caffeine in a black tea bag?

Caffeine is found in many different food items, from soda and chocolate bars to coffee and tea. Many people are curious about how much caffeine is in a typical black tea bag.

Caffeine content in a black tea bag

The amount of caffeine in a cup of black tea made from a single tea bag can range from 11 to 80 mg. Generally, the average amount of caffeine in a tea bag is around 30 mg, or the amount in a cup of decaffeinated coffee. However, this number can vary depending on the brand, type of tea, and brewing instructions used.

Factors That Impact The Amount Of Caffeine In A Cup Of Black Tea

The following factors can affect the caffeine levels in a cup of black tea:

  • Type of tea : The type of tea used will have the largest impact on caffeine levels. Black teas generally have more caffeine than white teas and green teas.
  • Tea bag size : Larger tea bags typically have more tea and more caffeine than smaller bags.
  • Brewing time : The longer you steep the tea, the more caffeine it will contain. The usual answer here is to steep the tea bag for a minute or two.
  • Brewing method : Different brewing methods can also affect caffeine levels in your tea. For instance, if you use a French press to brew your tea, it will have more caffeine.


Though the amount of caffeine in a single cup of black tea can vary, the average is around 30 mg per tea bag. Factors such as the type of tea used, the size of the tea bag, brewing time and method can all affect the caffeine levels.


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