How Many Milligrams and Ounces of Caffeine Are in a Cup of Coffee

It’s completely fine to have some caffeine in your diet– as long as you’re generally healthy. But you should not go overboard. Excessive caffeine can impact your heart rhythm, make you lightheaded, give you a headache and make you dehydrated. In basic, you must aim to keep your caffeine consumption to less than 200 milligrams a day– the quantity in about two cups of routine coffee.

How Much Caffeine In Cup Of Different Types of Coffee

The specific quantity of caffeine in a cup of coffee will differ depending on how strong you make it, although you’ll normally get approximately 95 milligrams from an 8-ounce freshly brewed cup. If you make routine instantaneous coffee, you’ll get over 60 milligrams of caffeine by stirring 2 teaspoons of immediate coffee crystals into 8 ounces of piping hot water. On those days when you require that extra kick and order a shot of espresso to contribute to your coffee, you’ll cram in another 65 milligrams of caffeine from just 1 ounce of espresso. You’ll even get a small amount of caffeine from decaf coffee. One cup of decaf can have close to 10 milligrams of caffeine. While everybody is various and you might be able to deal with more caffeine than some others, you should never ever have more than 600 milligrams in a day, the U.S. Food and Drug Administration reports.

What Factors Affect Caffeine Content?

The caffeine content of coffee depends upon many factors, such as:

  1. Type of coffee beans: There are numerous varieties of coffee beans readily available, which may naturally consist of different amounts of caffeine.
  2. Roasting: Lighter roasts have more caffeine than darker roasts, although the darker roasts have a much deeper taste.
  3. Type of coffee: The caffeine content can differ considerably in between regularly brewed coffee, espresso, instantaneous coffee and decaf coffee.
  4. Serving size: “One cup of coffee” can vary anywhere from 30– 700 ml (1– 24 oz), significantly impacting the total caffeine content.

Bottom Line: Caffeine content is impacted by the type of coffee bean, roast design, how the coffee is ready and the serving size.

Brewed Coffee

Brewing is the most common method to make coffee in the United States and Europe.

Also called regular coffee, brewed coffee is made by putting hot or boiling water over ground coffee beans, usually contained in a filter.

One cup of brewed coffee (8 oz) includes about 70– 140 mg of caffeine, or about 95 mg typically.

How Much Caffeine is in a Cup of Coffee?

How Much Caffeine is in a Cup of Espresso?


Espresso is made by forcing a small amount of warm water, or steam, through finely ground coffee beans.

Although espresso has more caffeine per volume than regular coffee, it usually consists of less per serving, considering that espresso portions tend to be small.

One shot of espresso is typically about 30– 50 ml (1– 1.75 oz), and contains about 63 mg (2 oz) of caffeine.

A double shot of espresso therefore consists of approximately 125 mg (4 oz) of caffeine.

Espresso-Based Drinks

Lots of popular coffee drinks are made from espresso shots mixed with varying types and amounts of milk.

These include lattes, coffees, macchiatos and Americanos.

Considering that the milk does not contain any extra caffeine, these beverages contain the same quantity of caffeine as straight espresso.

A single (small) consists of about 63 mg of caffeine on average, and double (big) includes about 125 mg (4 oz).

Instant Coffee

Instantaneous coffee is made from brewed coffee that has been freeze-dried or spray-dried. It is usually in large, dry pieces, which dissolve in water.

To prepare instantaneous coffee, merely mix one or two teaspoons of dried coffee with hot water. There is no need for any brewing.

Instant coffee generally consists of less caffeine than regular coffee, with one cup containing roughly 30– 90 mg.

Decaf Coffee

Although the name may be tricking, decaf coffee is not totally caffeine totally free.

It may include differing quantities of caffeine, ranging from 0– 7 mg per cup, with the typical cup consisting of 3 mg (0.1 oz).

Nevertheless, some varieties might contain even higher quantities of caffeine, depending on the type of coffee, method of de-caffeination and cup size.

Bottom Line: The typical caffeine content of an 8-oz, brewed cup of coffee is 95 mg. A single espresso or espresso-based drink includes 63 mg, and decaf coffee contains about 3 mg of caffeine (usually).

Last Update - September 23, 2017


The Author

Reyus Mammadli

As a healthy lifestyle advisor I try to guide individuals in becoming more aware of living well and healthy through a series of proactive and preventive measures, disease prevention steps, recovery after illness or medical procedures. Education: Bachelor Degree of Medical Equipment and Electronics.

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