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Caffeine is the primary active ingredient in a cup of coffee. On average, a cup of regular coffee contains approximately 97 milligrams of caffeine. However, the caffeine content varies for different types of coffee drinks purchased from most coffee places like Starbucks, Dunkin’ Donuts, Nespresso, etc.

Caffeine is a drug that can be addictive, which may explain why some soft drink brands add it to their drinks.

We do not fully understand the effects of caffeine on the body but it has both positive and negative effects on us.

Whatever the effects, people have genuine concerns about consuming too much caffeine and want to know just how much caffeine is in their cup of coffee and other beverages.

This article explores the factors that can affect the caffeine content of coffee and the amount of caffeine in different brands of coffee drinks.

Caffeine in coffe

Factors that Determine The Amount of Coffee in a Drink

Several factors affect the amount of caffeine in a cup of coffee. These factors include:

  • The variety of coffee bean – The caffeine content of raw coffee beans varies from one variety to another.
  • The roasting process – How the coffee beans are roasted affects the caffeine content of the finished product.
  • The brewing process – different types of coffee drinks, such as espresso, cappuccino, decaf coffee, etc. contain different amounts of caffeine.
  • Size of Cup – One would think a cup of coffee is the same size everywhere but this is not the case. A cup of coffee can be as small as 30 ml or as large as 750 mil, which has a big effect on the caffeine content.

Conclusion: There can be different answers to the question, “how much caffeine in a cup of coffee?” This is because many factors can affect the caffeine content of a cup of coffee.

Caffeine in Coffee

We have different brews of coffee and this affects the caffeine in your cup of coffee.

Regular Coffee

This is the type of coffee most people in the western world drinks. You brew it by adding hot water to ground coffee beans.

There are approximately 74 to 140 milligrams of caffeine in a cup (about 8 Oz) of regular coffee (a, b).

Instant Coffee

To get instant coffee, you freeze dry brewed regular coffee and break it down into small granules.

You add a few instant coffee granules to a cup and add hot water. There are approximately 30 to 90 milligrams of caffeine in a cup (8 Oz) of instant coffee.

Espresso Shots

You brew espresso coffee by forcing (or expressing) pressurized near-boiling water through finely ground coffee beans.

Volume for volume, espresso contains more caffeine than other types of coffee, but the small serving size contains less caffeine.

A single shot (cup) of espresso is typically 30 to 50 millimeters (1 to 1.8 oz) in terms of volume. There are about 64 milligrams of caffeine in a shot of espresso (c).

A double espresso contains approximately 127 milligrams of caffeine.

Decaf Coffee

Although the roasting process of decaf coffee removes most of the caffeine from the coffee beans, it still contains small amounts of caffeine.

The amount of caffeine in a cup of decaf coffee depends on the brand. However, most will contain about 0 to 11 milligrams of caffeine.

Caffeine in Coffee From Well-Known Coffee Places.

A cup of coffee you make at home is not the same as a cup of coffee from places like Starbucks. They usually use larger cups, which can increase the coffee content drastically.

The table below lists the caffeine content of various types of coffee from popular coffee shops.

Coffee Type
Serving Size
Amount of Caffeine
Dunkin’ Donuts Coffee
14 oz (medium)
210 milligrams
Starbucks Espresso
2 oz (doppio)
150 milligrams
Panera Coffee (Light Roast)
16 oz (regular)
300 milligrams
Starbucks Coffee (Blonde Roast)
20 oz (venti)
475 milligrams
Starbucks Americano Caffé
16 oz (grande)
225 milligrams
Starbucks Cappuccino
16 oz (grande)
150 milligrams
Starbucks Mocha Frappuccino
16 oz (gande)
110 milligrams
Starbucks Frappuccino (bottle)
14 oz
130 milligrams
Starbucks Coffee (Pike Place Roast)
16 oz. (grande)
310 milligrams
Starbucks Coffee (Pike Place Roast)
12 oz (tall)
235 milligrams
Starbucks Caffé Americano
16 oz. (grande)
225 milligrams
Starbucks Iced Coffee
16 oz. (grande)
190 milligrams
Starbucks Caffé Mocha
16 oz. (medium)
175 milligrams
Starbucks Iced Black Coffee (bottle)
11 oz.
160 milligrams
Starbucks Double Shot Energy Coffee (Can)
15 oz
145 milligrams
Starbucks Coffee Frappuccino
16 oz (grande)
95 milligrams
Dunkin’ Donuts Turbo Shot
20 oz (large)
397 milligrams
Dunkin’ Donuts Cappuccino
20 oz (large)
235 milligrams
Decaf Coffee From Starbucks, Panera, or Dunkin’ Donuts
16 oz
10 to 25 milligrams
Panera Frozen Mocha
16 oz (medium)
187 milligrams
Nespresso Kazaar Capsule
1 capsule
120 milligrams
Nespresso Capsule (other)
1 capsule
50 to 80 milligrams
Maxwell House Light Ground Coffee
12 oz (from 2 Tbs.)
50 to 100 milligrams
Folgers Ground Coffee (House Blend)
12 oz (from 2 Tbs.)
60 to 80milligrams
Maxwell House Ground Coffee (Lite)
12 oz (from 2 Tbs.)
50 to 70 milligrams
Maxwell House Ground Coffee (Decaf)
12 oz. (from 2 Tbs.)
2 to 10 milligrams


Should You Be Worried About Caffeine?

Coffee contains high amounts of antioxidants and research suggests that drinking coffee may be good for your health.

However, the caffeine content of coffee may produce undesirable side effects when consumed in excessive amounts. It can disrupt your sleep, cause irregular heartbeats, and make you restless (d, e).

Most adults can consume a total of 400 to 600 milligrams of caffeine a day without experiencing any adverse effects. This is the equivalent of an average of 4 to 6 cups of coffee a day.

In the end, the effects of caffeine on you depends on how sensitive you are to caffeine. You may have to experiment with different levels of consumption to find out your limit.

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