How much caffeine is in a cup of coffee?

Do you ever wonder how much caffeine is in your coffee? In this blog post, we'll take a look at how much caffeine is in coffee, tea and soda (to compare to coffee). We'll also explore how much caffeine is in different types of coffee drinks. Whether you're looking for information on how much caffeine is in iced coffee or how much caffeine is in a latte, we've got you covered!


How much caffeine is in a cup of coffee?

How much caffeine is in a typical cup of coffee? According to the Mayo Clinic, a cup of brewed coffee has 95-200 mg of caffeine. (Their site says specifically 96 mg, but we prefer a range)

But how much caffeine is in a cup of coffee from different types of brewing methods?

A single shot of espresso has 64 mg of caffeine, while iced coffee has 70-140 mg and cold brew has 70-120 mg.

And, if you're curious, decaf coffee has about 12 mg of caffeine per cup. So it's not technically totally caffeine-free, so beware when drinking coffee later at night.


How much caffeine is in a cup of tea?

What about tea? A cup of black tea has 47 mg of caffeine, while green tea has 29 mg. Herbal teas have 0 mg of caffeine.


What about soda?

As for soda, a can of Coca-Cola has 34 mg of caffeine and a can of Pepsi has 38 mg.


A quick breakdown of caffeine levels in different drinks:

  • Hot cup of coffee (8 oz): 95-200 mg of caffeine
  • Single shot of espresso: 64 mg of caffeine
  • Iced coffee (8 oz): 70-140 mg
  • Cold brew (8 oz): 70-120 mg


Why does hot coffee have more caffeine than cold coffee?

When hot water is added to coffee grounds, the caffeine is extracted from the beans and dissolves into the water. This process happens more quickly at higher temperatures, which is why hot coffee has more caffeine than cold brew coffee. Cold brew coffee is made by steeping coffee grounds in cold water for a long period of time, typically 12 hours or more. Since the extraction process happens more slowly at lower temperatures, cold brew coffee has less caffeine than hot coffee.

However, it is important to note that the levels of caffeine can be influenced by how concentrated your cold brew coffee is. If you've got a "thicker" concentrate and you drink that without adding water or ice, you're going to have more caffeine per ounce than you would if you watered it down a bit.


Were you surprised by these results? We definitely were, especially as it relates to cold brew coffee. But, we tend to do pretty concentrated Runyon Coffee cold brew over ice, so if we don't add enough ice, we can definitely feel the caffeine!