how much caffeine is in black tea

how much caffeine is in black tea

How Much Caffeine Is In Black Tea?

Black tea is one of the most popular teas in the world, with its unique flavor and many health benefits. But one of the most common questions people have about black tea is ‘how much caffeine is in black tea?’.

Caffeine Content in Black Tea

The amount of caffeine in black tea can vary widely depending on the specific tea, brewing method, and steeping time. Generally, however, a cup of black tea contains between 14 and 70 milligrams of caffeine. Since there is no one-size-fits-all answer to this question, there are ways to estimate how much caffeine you are consuming.

Factors That Impact Caffeine in Black Tea

Some of the most important factors that determine the caffeine content in black tea include:

  • Tea Variety: Certain varieties of black tea, such as Assam and Darjeeling, contain higher levels of caffeine than others.
  • Brewing Time: The longer you steep the tea leaves, the more caffeine will be released.
  • Brewing Temperature: Hotter brewing temperatures will release more caffeine.
  • Amount of Tea Used: The more tea used, the higher the caffeine content.

Caffeine Content in Popular Types of Tea

For reference, here are some popular types of tea and their approximate caffeine content:

  • Earl Grey: 30-50 milligrams per cup
  • English Breakfast: 40-60 milligrams per cup
  • Oolong: 37-55 milligrams per cup
  • Green Tea: 25-29 milligrams per cup
  • Decaffeinated Black Tea: 2-12 milligrams per cup


Black tea has a wide variety of health benefits, but its caffeine content can vary significantly depending on the brewing method, steeping time, and tea variety. Knowing the caffeine content of your favorite tea can help you make informed decisions about how much you should be drinking.


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