Is Arabic coffee high in caffeine compared with espresso?

Caffeine in a cup depends far more on the bean and the brew than on the drink name. Robusta beans hold roughly 2 to 4 percent caffeine by weight, while Arabica sits near 0.9 to 1.4 percent, so a latte, americano or cappuccino made from the same espresso can land close together. Longer brewing does not simply add stimulation either.

Growing altitude also shifts things: higher, cooler farms tend to produce Arabica with less caffeine because pest pressure is lower. Extraction matters as well, since caffeine is a large molecule that dissolves later than many flavor compounds. Arabica is what most freshly ground coffee uses, with a little Robusta sometimes blended in for a thicker crema.

Many people are both captivated by the aroma of coffee and afraid of tossing and turning at night after drinking it. So a common question arises: do lattes, Americanos, and cappuccinos contain the same amount of caffeine? Does brewing longer make them more energizing? In fact, the caffeine content of a cup of coffee is far more complicated than you might imagine—it depends on the coffee bean variety, growing altitude, extraction method, and even grind size. This time, Front Street Coffee will clarify everything about caffeine content in one go: the data for common coffee types, the misconceptions that are easy to fall into, and alternative choices for when you don't want to consume caffeine.

"I really want to drink coffee, but I'm afraid of tossing and turning all night and not being able to sleep~"

In most people's minds, coffee is naturally a beverage meant for staying awake, but its captivating aroma also attracts a group of people who simply pursue good taste, including friends who are intolerant to caffeine yet "crave" it—like the customer mentioned at the beginning by Front Street Coffee. Today, Front Street Coffee will talk about the caffeine content of various types of coffee, as well as the common misconceptions people have about caffeine.

What exactly determines the caffeine content in a cup of coffee?

How much caffeine a coffee bean contains first depends on its variety and growing altitude. Take the two most familiar varieties: Robusta's caffeine accounts for about 2–4% of its own weight, while Arabica is around 0.9–1.4%, usually only half that of Robusta. Most freshly ground coffee on the market uses Arabica varieties, with only a few blends adding a small proportion of Robusta to give espresso a richer crema.

The higher the growing altitude, the lower the caffeine content tends to be. High-altitude production areas have lower temperatures and fewer pests and diseases, so coffee trees don't need to secrete as much caffeine to resist pests. This also explains why Robusta grown at low altitudes has such high caffeine content, so this rule mainly applies to Arabica.

Front Street Coffee has previously explained that when brewing coffee, lighter flavor molecules are released first, while heavier large molecules dissolve into the water later. Caffeine, with the chemical formula "C8H10N4O2", is a large-mass molecule, so like flavor substances, the amount of caffeine released is also related to extraction time. In other words, the longer it brews, the higher the caffeine.

So espresso-based drinks are actually not the highest in caffeine. Drip coffee, mainly pour-over, and immersion coffee, mainly French press, have slightly higher caffeine content. And although cold brew and ice drip coffee use low-temperature extraction, their extremely long extraction times make their caffeine content even higher than the previous types.

Below is Front Street Coffee's approximate caffeine content reference for common coffee types based on daily output:

espresso (20g coffee grounds/40g coffee) about 100mg; ( latte, Americano, cappuccino, etc. are the same) pour-over coffee (15g grounds/195ml coffee, 2 minutes) about 90mg; French press (20g grounds/4 minutes) about 135mg; ice drip coffee (one cup 20g grounds/200ml coffee, 8 hours) about 135mg; cold brew coffee (one cup 20g grounds/200ml coffee, 12 hours) about 140mg; drip bag coffee (one bag 10g grounds/120ml coffee) about 50mg; instant coffee (one bag) about 50mg.

Front Street Coffee would like to emphasize once more here that the above values are based on conventional extraction methods and are not absolute results. The actual caffeine content of a cup of coffee is also related to the extraction rate. For example, if you brew two cups of Front Street Golden Mandheling coffee, one with a fine grind and one with a coarse grind, keeping other parameters consistent, then the fine grind will definitely release more flavor substances than the coarse grind, and the caffeine content will naturally be higher too. In other words, the finer the coffee grounds are ground, the richer the brewed taste and the more energizing it is.

Misconception one about caffeine

There are often popular science articles online reminding us that adults should not consume more than 400mg of caffeine per day, otherwise it will affect health. Friends who are sensitive to caffeine will then wonder how to calculate the specific caffeine value from the drinks they consume, so as to avoid excessive intake. So they ask: "How much caffeine is actually in a cup of **coffee?"

You should know that from a barista's perspective, besides coffee variety, growing altitude, and brewing time, the many factors that affect the extraction of coffee substances also determine how much caffeine there is. Take pour-over as an example: differences in grind size, water temperature, pouring technique, and coffee-to-water ratio will all directly change the amount of caffeine extracted, so it is very difficult to measure with specific values.

Misconception two about caffeine

Front Street Coffee has noticed that some friends believe caffeine is related to the degree of roasting. They think that the darker the roast, the lighter the coffee beans become, so when weighing the same weight of beans for brewing, dark-roasted coffee requires more beans than light-roasted beans. In addition, dark-roasted beans have a more porous structure and are easier to extract flavor substances from, so they conclude that dark-roasted beans have higher caffeine content and a stronger energizing effect.

However, many studies have shown that in reality the degree of roasting of coffee beans has almost no effect on caffeine. At this point, some friends with personal experience may say: drinking dark-roasted coffee really does make me more energized! That can only mean that in your subconscious, compared with mild-tasting acidic coffee, only heavy-bodied bitter coffee can make you feel alert. This is also why many people mistakenly believe that espresso has the highest caffeine content.

What should you do if you want to drink coffee but don't want to consume caffeine?

For some friends who are intolerant to caffeine, whether it's instant coffee, bottled coffee, freshly ground espresso, drip pour-over, or long-extraction ice drip and cold brew coffee, these drinks all have relatively high caffeine content, and drinking them easily makes it hard to sleep. If you really want to drink coffee but don't want to consume caffeine, you can choose artificially decaffeinated coffee; this type of coffee bean contains almost no caffeine.

The above content is compiled by CoffeeHunters, a coffee news website.