Title card for a blog post by Road Dog Coffee about caffeine content in coffee beans

Caffeine Content in Coffee: How much Caffeine is in each roast?

Understanding Caffeine: Dark vs. Light Roasts

When it comes to caffeine content in coffee, does the type of roast truly make a difference? There’s a lot of buzz around this question, so let’s dive in and clear up the myths about dark and light roasts. Coffee lovers often find themselves debating whether their morning pick-me-up is packing more punch depending on how dark or light the beans are roasted. Let’s settle this once and for all.

Dark Roasts vs. Light Roasts: The Truth About Caffeine Content

Which roast has more caffeine, dark or light? This debate has been brewing for ages. Some folks swear that dark roasts have more caffeine because of their strong, bold flavors. Others insist that light roasts, being less roasted, hold onto more caffeine. It's a common topic of conversation among coffee enthusiasts, but let's get to the facts.

Coffee beans roasted to varying levels arranged from darkest to lightest.

The real deal is that caffeine is pretty stable during the roasting process. It doesn't burn off or fade away as the beans get darker. So, whether you're sipping on our Long Haul medium-dark roast Colombia blend, Expedite medium-dark Papua New Guinea blend, or Black Dog ultra-dark roast South American blend, the caffeine content is pretty much the same. The big difference is in the taste and strength of the flavor, not the caffeine kick.

The robust flavors of dark roasts come from the longer roasting time, which brings out those deep, rich notes. Light roasts, on the other hand, keep more of the bean’s original flavors, giving you a brighter, more acidic taste. But when it comes to caffeine, you’re getting a similar jolt no matter which roast you choose. So next time you grab a cup, know that your caffeine fix is coming from the beans, not the roast.

Comparing Bean Count

To understand caffeine content better, let's delve into an experiment. When we weigh ten grams of both a light roast and a dark roast, we observe differences in bean count due to changes in density during roasting.

For instance, ten grams of our Long Haul blend, which is a medium-dark roast, might contain approximately 65-70 beans. In comparison, the same weight of our Black Dog blend, an ultra-dark roast, might include about 70-75 beans.

This variance may seem trivial at first glance, but when considered over a 12-oz. bag, or even a pound of coffee, the difference becomes significant, with the dark roast beans outnumbering the light roast beans by roughly 90.

Understanding the Bean Count and Caffeine Content

The difference in bean count highlights how density changes impact our measurements. Dark roasts, which are roasted longer, lose more moisture and become less dense. This is why you get more beans by weight with darker roasts.

For example, when you scoop out a measure of our Black Dog ultra-dark roast South American blend, you'll notice it’s lighter and has more beans compared to a scoop of our Long Haul medium-dark roast Colombia blend. 

This difference is due to the longer roasting process which causes dark roast beans to puff up and lose density. Essentially, darker roasts are less dense because they’ve lost more moisture, resulting in more beans by weight.

When you measure coffee by volume, light roast coffee will generally have more caffeine because the beans are denser. This means a scoop of light roast will have more coffee particles, and hence, more caffeine. 

If you’re using a tablespoon to measure your coffee, you’re likely packing in more caffeine with a light roast like our Expedite medium-dark Papua New Guinea blend compared to the same scoop of a dark roast. This is because denser beans mean more caffeine per scoop.

Conversely, if you measure your coffee by weight, darker roasts will have more caffeine because there are more beans and less mass per individual bean. For instance, if you weigh out 50 grams of both a light and a dark roast, you’ll find the dark roast has more beans, potentially giving you a stronger caffeine hit. So, whether you measure by volume or weight, knowing the density and bean count can help you understand how much caffeine you’re actually getting in your cup.

Green, unroasted coffee beans pouring from a burlap bag onto a wooden surface

Arabica vs. Robusta: A Key Factor in Caffeine Content

Another essential factor to consider is the type of coffee bean used, as Arabica and Robusta beans differ significantly in their natural caffeine levels. Arabica beans are known for their smooth, mild flavors but naturally contain less caffeine. Our Long Haul blend, which uses primarily Arabica beans from Colombia, offers a flavorful cup with moderate caffeine content.

On the other hand, Robusta beans, like those used in our Expedite blend from Papua New Guinea, naturally have higher caffeine levels. This higher caffeine content not only gives Robusta beans a stronger, bolder flavor but also acts as a natural pest deterrent. So, when you choose our 100% Robusta Expedite blend, you're opting for a coffee that provides a more intense caffeine boost compared to an Arabica-based blend.

By understanding the differences between Arabica and Robusta beans, you can better choose a coffee that suits your caffeine needs and flavor preferences. Whether you prefer the smooth taste of Arabica or the bold punch of Robusta, we've got a blend that fits your style.

Caffeine Content in Road Dog Coffee Blends

Understanding the caffeine content in our Road Dog Coffee blends is essential for coffee enthusiasts who want to optimize their caffeine intake.

We examined the caffeine levels in our Long Haul, Expedite, and Black Dog blends, considering the typical caffeine content in Arabica and Robusta beans and the usual caffeine extraction rate during brewing.

Long Haul

Long Haul, a medium-dark roast Colombia blend primarily made from Arabica beans, contains about 96 mg of caffeine per 8-ounce cup.


Expedite, a medium-dark roast 100% Papua New Guinea Robusta blend, packs a punch with approximately 176 mg of caffeine per cup.

Black Dog

Black Dog, our ultra-dark roast South American blend featuring a mix of Arabica and Robusta beans, offers around 136 mg of caffeine per cup.

These estimates highlight the varying caffeine levels across our blends, allowing you to choose the one that best suits your needs. Whether you need a moderate boost from Long Haul, a strong kick from Expedite, or something in between with Black Dog, Road Dog Coffee delivers the perfect cup to fuel your day.


At Road Dog Coffee, we want to dispel myths and provide clarity. Whether you're a trucker on a long haul, a busy professional, or a coffee enthusiast, understanding these nuances can enhance your coffee experience.

Try our Long Haul, Expedite, or Black Dog blends today and experience the difference for yourself.

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