How Much Caffeine In A Shot Of Espresso?

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For many of us, a shot of espresso is the elixir of life, the swift kick that propels us into action each morning. Its bold and intense flavor, often referred to as “liquid gold,” is the foundation of countless coffee enthusiasts’ daily routines. 

But have you ever wondered just how much caffeine is in a shot of espresso? In this article, we delve into the world of espresso to uncover the caffeine content of this beloved beverage and explore the factors that can influence it.

How Much Caffeine In A Shot Of Espresso

While a lot of factors influence how much caffeine is in a shot of espresso, typically a standard shot of espresso, also known as a single shot, contains approximately 63 milligrams of caffeine. In comparison, an 8 oz cup of brewed coffee contains around 95 milligrams of caffeine. It is a common assumption that a shot of espresso contains more caffeine than drip coffee, but when you get down to the numbers you see the reverse is actually true.

Caffeine In A Shot Of Espresso

Understanding Espresso

Espresso is a unique coffee preparation method characterized by its small serving size and strong, concentrated flavor. Unlike drip coffee, which is made by slowly dripping hot water through a bed of ground coffee beans, espresso is created by forcing hot water through finely ground coffee beans using a specialized machine known as an espresso machine. Espresso forms the base for many coffee shop drinks like the latte, cappuccino, flat white, macchiato, and americano to name a few.

The Standard Espresso Shot

A standard shot of espresso, also known as a “single shot,” typically contains approximately 1 ounce (30 milliliters) of liquid. On average, a single shot of espresso contains approximately 63 milligrams of caffeine. However, the caffeine content can vary depending on several factors, such as the type of coffee bean used, the grind size, and the brewing method. While there is some variation, this figure can be used as a guide for other espresso drinks, which are mixed with milk. 

How much caffeine in a shot of espresso

Factors Affecting Caffeine Content In Espresso

As previously mentioned, the amount of caffeine in an espresso shot is merely an approximation, considering the multitude of variables that can influence caffeine content. So let’s see what these are…

Type of Coffee Bean

The choice of coffee bean variety plays a pivotal role in shaping the caffeine content of espresso. Among the two prominent coffee bean types, Arabica and Robusta, disparities emerge. Robusta beans, renowned for their robust and bitter notes, are often considered less refined than their Arabica counterparts. They frequently find their place in instant coffee and certain espresso blends, contributing to the creation of a rich crema. One of the most striking distinctions of Robusta beans is their high caffeine content, which is almost double that of Arabica beans. Consequently, espresso crafted from Robusta beans boasts a higher caffeine concentration.

In contrast, Arabica coffee beans reign supreme in the realm of specialty coffee. These beans enchant connoisseurs with their intricate and diverse flavor profiles. The lower caffeine content inherent to Arabica beans plays a pivotal role in shaping their gentler, less bitter, and more nuanced flavor profile.

Quantity of Coffee

The amount of coffee used is a fundamental determinant of caffeine content. Typically, a single shot of espresso is crafted using 7-9 grams of coffee, while a double shot requires 14-18 grams. As one might expect, the greater the quantity of coffee grounds used, the higher the caffeine concentration in the shot.

Brew Time

Although caffeine is one of the quickest compounds to extract from coffee beans, brewing time remains influential. For instance, the French Press method, which involves several minutes of steeping before plunging, yields a higher caffeine level compared to the rapid extraction of espresso, which takes only 20-30 seconds.

This principle extends to different types of espresso shots. A Ristretto shot, using half the water and brewed swiftly, contains less caffeine than a standard espresso shot. Conversely, a Lungo shot, prepared with double the water and a lengthier extraction period, results in a higher caffeine content.

Water Temperature

The temperature of the water used also significantly affects caffeine extraction. Higher water temperatures lead to higher caffeine extraction. Espresso, for instance, is brewed at temperatures between 90-96°C (194-205°F) and takes around 30 seconds for full extraction. Lower water temperatures require longer brew times or result in lower caffeine levels, as exemplified by the lengthy extraction process of cold brew.

Grind Size

Grind size also plays a crucial role in caffeine extraction. A finer grind, as employed in espresso, allows for faster caffeine extraction due to increased surface area. This explains why espresso can be brewed so swiftly. Conversely, the coarser grind of French Press coffee necessitates a longer extraction period.

As demonstrated, numerous factors such as coffee bean type, amount of coffee, brew time, water temperature, and grind size all contribute to caffeine levels in an espresso shot.

Does The Type Of Roast Affect Caffeine Content?

It is a common belief that darker roasts, known for their bold, bitter flavors, contain more caffeine. However, in reality, darker roasts have slightly less caffeine than their lighter counterparts. However, the distinction in caffeine content between different roast levels is minimal and generally insignificant in the context of brewing espresso.

What carries more weight is the method of measuring coffee beans. Dark roast coffee beans weigh less than light roast beans because they lose density during the extended roasting period. When measured by weight, the caffeine content remains quite similar, as you’ll end up using more dark roast coffee beans.

Nevertheless, when beans are measured by scoops, lighter roast coffee, having slightly more caffeine per bean, may yield a tad more caffeine. Additionally, since light roast beans are smaller and denser, there are slightly more of them in a scoop.

In practice, the caffeine discrepancy between light and dark roast coffee is so minute that it need not factor into your choice of coffee beans.

Caffeine in Espresso vs. Drip Coffee

Espresso delivers a potent punch of caffeine especially when compared to drip coffee which is a much larger and milder beverage. It seems logical to assume that espresso, with its concentrated nature, would outdo drip coffee in the caffeine department. However, the numbers tell a different story. An 8 oz cup of brewed coffee contains approximately 95 milligrams of caffeine, while a single shot of espresso contains just 63 milligrams.

So why does it feel like espresso provides a bigger caffeine kick? The key lies in how you consume it. Espresso is significantly more concentrated than drip coffee, with more caffeine per ounce. Additionally, its small serving size encourages quick consumption, resulting in a fast caffeine hit.

On the other hand, brewed coffee offers a gentler experience, savored slowly over an extended period, leading to a more gradual caffeine release. Its standard serving size is also considerably larger, resulting in a higher overall caffeine count.

Caffeine in a cup of coffee

Caffeine In Commercial Coffee Chains

It’s essential to note that espresso beverages from popular commercial coffee chains often boast higher caffeine levels compared to your typical home-brewed coffee. Moreover, these establishments are known for their generous cup sizes. Below, we’ve provided the caffeine content of various well-known coffee brands, based on data compiled from Caffeine Informer and the brands themselves. Please keep in mind that these values are approximations, and actual caffeine content may fluctuate.


Starbucks, renowned as one of the world’s most prominent and beloved coffee brands, boasts an extensive coffee menu with various roast options. For those who opt for the Blonde Roast, here’s an overview of the caffeine levels:

  • Short (8 oz): 180 mg
  • Tall (12 oz): 270 mg
  • Grande (16 oz): 360 mg
  • Venti (20 oz): 475 mg
Caffeine in starbucks coffee

Moreover, a single espresso shot, a favorite at Starbucks, packs about 75 milligrams of caffeine. It’s worth noting that even the decaffeinated version of espresso is not entirely caffeine-free, containing 3-15 mg of caffeine depending on the size.

The caffeine content in Starbucks’ coffee offerings leans toward the higher end, often featuring 2 to 3 espresso shots in a single cup. The Venti, with its generous 20-ounce size, surpasses the recommended daily caffeine limit of 400 mg.

To sum it up: A standard 8 oz cup of coffee at Starbucks delivers 180 mg of caffeine, while decaffeinated coffee contains a minimal 3 mg. Meanwhile, a single espresso shot offers a sharp 75 mg caffeine kick.

McDonald’s Coffee

McDonald’s is a renowned food chain that also offers coffee and cabinet food, in most parts known as McCafe. McDonald’s doesn’t provide the specific caffeine content of their drinks, instead, they rely on the average caffeine content data provided by the USDA as a reference point. Consequently, the actual caffeine content can vary significantly based on the type of drink and its size. Here’s an estimation of the caffeine content in their brewed coffee:

  • Small Cup (12 oz.) has 109mg of caffeine
  • Medium Cup (16 oz.) has 145mg of caffeine
  • Large Cup (21-24 oz.) has 185mg of caffeine
  • Decaf Coffee has 8-14 mg of caffeine depending on the size
caffeine in mccafe coffee

In the case of espresso, a single shot provides approximately 71 mg of caffeine.

To sum it up: The smallest 12 oz cup of coffee delivers 109 mg of caffeine, while decaf coffee registers a mere 8 mg of caffeine. A single shot of espresso offers 71 mg of caffeine.


Finally, let’s take a look at Dunkin, the popular coffee chain celebrated for its delectable donuts and coffee offerings. Dunkin’s brewed coffee, known for its caffeine kick, features the following caffeine content across various sizes:

  • Small (10 oz.) has 150mg of caffeine
  • Medium (16 oz.) has 210mg caffeine
  • Large (20 oz.) has 300mg of caffeine
  • Extra Large (24 oz.) has 359mg of caffeine
  • Decaf coffee has 7-18mg depending on the size
Caffeine in Dunkin coffee

For those who prefer a quick espresso fix, a single shot of Dunkin’s espresso provides a bold 118 mg of caffeine.

In summary: The modest 10 oz size of coffee packs 150 mg of caffeine, while decaf coffee only contains 7 mg. A single shot of espresso, on the other hand, offers a robust 118 mg of caffeine.

It’s evident from these figures that when purchasing coffee from a commercial chain, being mindful of the caffeine levels is essential.

Is Caffeine A Cause For Concern?

Caffeine is a natural stimulant found in various plants, and serves as a natural pesticide, deterring insects. It’s commonly present in coffee beans, tea leaves, cacao beans, and kola nuts. When consumed, caffeine exerts a stimulating effect, enhancing alertness and focus. 

For most individuals, caffeine is considered safe and even comes with potential health benefits, such as heightened cognitive function and a lowered risk of certain diseases. The FDA recommends a maximum daily caffeine intake of 400mg for healthy adults (equivalent to about 4-5 cups of coffee) and 200mg for pregnant women. Nonetheless, sensitivity to caffeine varies widely among people, with some experiencing adverse effects at lower doses while others remain unaffected even with higher consumption.

Excessive caffeine intake can lead to unwanted effects including jitters, anxiety, nausea, restlessness, and sleep disturbances. It is important to be mindful of your own tolerance and adjust your intake if adverse reactions occur.

Strategies For Reducing Caffeine Consumption

If you’re considering cutting down on caffeine, the first step is modifying your coffee order:

  • Order Smaller: As demonstrated earlier, larger espresso drinks from establishments like Starbucks and Dunkin’ often contain substantial caffeine levels, with the Venti size at Starbucks surpassing the recommended daily limit.
  • Brew Smaller: We’ve seen that the quantity of coffee beans used influences caffeine levels. Preparing a smaller beverage can effectively reduce your caffeine intake.
  • Be Mindful Of Caffeine Sources: Remember that caffeine isn’t exclusive to coffee; it’s also present in tea, soft drinks, and even chocolate. Check beverage labels to track your caffeine consumption. Alternatively, consider switching to caffeine-free herbal teas or decaffeinated soft drinks.

Remember reducing caffeine intake should be done gradually to minimize withdrawal symptoms. 

How Much Caffeine In A Shot Of Espresso – The Bottom Line

Whether you opt for the quick and concentrated caffeine kick from an espresso shot or savor a larger and milder cup of brewed coffee, you will find both beverages contain caffeine. A single shot of espresso contains around 63mg of caffeine, while surprisingly an 8 oz cup of coffee contains more caffeine coming in at around 95mg. Therefore, if you’re seeking to cut back on caffeine, ironically it’s the espresso shot that may suit your needs—just stick to single shots!


Does Instant Coffee Contain Caffeine?

Instant coffee, also referred to as soluble coffee, is crafted from brewed coffee that undergoes a freeze-drying or spray-drying process. It’s specifically designed to dissolve rapidly in hot water, offering a convenient option for coffee enthusiasts.

One might assume that instant coffee, often made from more economical Robusta beans, boasts a higher caffeine content compared to brewed coffee. However, this assumption isn’t accurate. While the exact caffeine content varies from brand to brand, an average 8 oz cup of instant coffee typically contains approximately 30-90 mg of caffeine (1).

The caffeine content is notably lower compared to other coffee types, primarily as some of the caffeine is lost during the drying process. 

Does Decaf Coffee Contain Caffeine?

Yes, decaffeinated (decaf) coffee does still contain a small amount of caffeine. This is because the process used to decaffeinate coffee beans is challenging to completely eliminate caffeine without ruining the coffee’s flavor. As a result, trace amounts of caffeine remain in decaffeinated coffee. Caffeine levels in decaf coffee can vary, typically ranging from 0 to 7mg per cup (2).