Arabica is the smoother, sweeter coffee species with less caffeine; robusta is hardier, cheaper and more bitter, with nearly twice the caffeine. Arabica grows at higher elevation and carries roughly 1.2 to 1.5% caffeine by weight; robusta grows low and hot and carries roughly 2.2 to 2.7%. Arabica makes up most of the world's coffee. Robusta is common in instant coffee, low-cost blends and many espresso blends.

We roast one coffee, 100% Colombian Supremo Arabica, in cast iron on our family farm in Cedarburg, Wisconsin, and we hear this question at the markets often. Here are the differences, what robusta is honestly good for, and what "100% arabica" on a bag tells you.

Arabica vs robusta at a glance

These are typical ranges, not lab results; real beans vary by farm and year. The figures come from a retailer's summary, Colipse Coffee's arabica vs robusta guide, which cites a 2018 study for sugar and oils.

Two species

Coffee is a genus with more than a hundred species, but two of them make up nearly all the coffee people drink. Robusta is the common name for Coffea canephora, a lowland plant from central and west Africa. Arabica, Coffea arabica, is a natural cross: long ago a robusta plant and Coffea eugenioides, a small-fruited species of the east African highlands, combined in the forests of Ethiopia, and the offspring kept both full sets of chromosomes. That is why arabica has 44 chromosomes and robusta has 22. We tell that story in what the mother coffee tree is.

Arabica likes cool, high slopes and is fussy about heat and disease. Robusta thrives low and hot, stands up better to pests and weather, and is cheaper to farm. More in our coffee plant botany overview.

Taste

In the cup, arabica is the gentler of the two. Green arabica beans carry more natural sugar and more oil than robusta, and roasting turns those into the sweetness, aroma and rounder body many people mean when they say "good coffee". Depending on origin and roast, that can show up as nuts, chocolate, caramel or fruit.

Robusta tastes heavier and more bitter, often described as earthy, woody or grainy. Part of that is chemistry: caffeine itself tastes bitter, and robusta has nearly twice as much. Still, robusta is not bad coffee by nature. Carefully grown robusta can be pleasant, and some people like its heavy body.

Roast matters as much as species. A scorched arabica can taste harsher than a well roasted blend, so if bitterness bothers you, see why coffee tastes bitter. For one origin up close, see what Colombian coffee tastes like.

Caffeine

By weight, robusta carries roughly 2.2 to 2.7% caffeine and arabica about 1.2 to 1.5%. Brew the same weight of each the same way, and the robusta cup will hold roughly one and a half to two and a quarter times the caffeine (our estimate from those ranges; the midpoints, 2.45% divided by 1.35%, come to about 1.8).

For regular brewed coffee, the FDA lists 113 to 247 milligrams of caffeine in 12 fluid ounces. The range depends on the beans, the amount of coffee and the brew. Our guide to how much caffeine is in a cup of coffee goes further.

Our own coffee is a normal arabica coffee. We have not lab-tested it, so we do not print a number for it. If you want less caffeine, use a little less coffee or pour a smaller cup. We do not make decaf.

Price, and where robusta shows up

Robusta is easier to farm on a large scale, so it sells for less. One retailer's guide puts the savings at 30 to 50% against arabica of the same grade, and both prices move with the commodity markets. Here is where robusta usually ends up:

• Instant coffee. Most instant coffee is made with robusta because it costs less.
• Low-cost blends. Many budget cans and blends use some robusta to keep the price down. If a bag does not say 100% arabica, it may contain robusta.
• Espresso blends. Traditional Italian-style espresso blends often use 10 to 40% robusta for a thicker crema and fuller body.

That is robusta's honest place: lower cost, more caffeine and a thick crema. If those matter most to you, a blend with some robusta is a fair choice.

What "100% arabica" on a label does and doesn't promise

It promises one thing: there is no robusta in the bag. That is worth knowing, but arabica is 60 to 70% of the world's coffee, so plenty of ordinary coffee qualifies.

It does not tell you when the coffee was roasted, how dark, where it was grown, or whether it sat in a warehouse for months. A stale 100% arabica still tastes stale. Look past the species to a roast date, a roast level, an origin and the price per pound. Our guide to choosing coffee beans walks through every line on the bag, and grocery store coffee vs fresh roasted covers the freshness side.

Colombia and arabica

Colombia grows almost exclusively arabica, most of it between about 1,200 and 2,300 meters (roughly 3,900 to 7,500 feet) in the Andes, according to 1Zpresso's guide to Colombian coffee. You may read that Colombian law allows only arabica; we have not found a law that says so, so we say almost all.

You will also see the word Supremo on Colombian coffee. Supremo is a Colombian grading term for the largest screen size of bean. It describes size, not species. We buy Supremo because larger beans roast evenly, which matters in a cast iron roaster. More in our guide to Colombian Supremo coffee.

Our coffee, and when another one suits you better

We make one coffee: 100% Colombian Supremo Arabica, with no robusta, no filler and nothing added. We roast it medium-dark in the German Norwegian style, one roast that releases beans at different points, so each batch holds a spread of roast levels. We began in a cast iron pan, then built custom cast iron stovetop roasters, and now use a cast iron drum roaster, in a barn that has been in our family since 1944. Customers describe the coffee as smooth, bold and low in acid, and good black. More in what makes our coffee different.

“I’m kind of a coffee snob and this is fantastic coffee. Rich, flavorful, but smooth and packs a punch!”
Lydia W, Facebook, July 2025

To try it, the Big Hoff Bag in whole bean is 2 lb for $34, and it also comes ground. At about 35 eight-ounce cups per pound (standard strength, the SCA golden cup ratio), that bag makes about 70 cups, roughly $0.49 a cup (an estimate). To start smaller, The Hoff is 1 lb for $25. Ground is one medium-fine grind that works for every brew method, espresso included. If you grind at home, order whole bean. Shipping is free on orders of $50 or more, by USPS to US addresses.

Another coffee will suit you better if you want the most caffeine for your money, the thick crema of a classic Italian espresso blend, the speed of instant, or decaf, flavored or light roast coffee. We make none of those, and there is good coffee out there for each of them.

Arabica vs robusta questions

Is arabica better than robusta?

If taste comes first, usually yes: arabica is smoother and sweeter, with less bitterness. Robusta wins on price, caffeine and crema. Freshness and roast matter as much as species.

Is robusta stronger than arabica?

It has more caffeine, roughly 2.2 to 2.7% by weight against arabica's 1.2 to 1.5%, and it tastes more bitter, so it comes across as stronger. How strong your cup tastes still depends mostly on how much coffee you use.

What is robusta used for?

Mostly instant coffee, low-cost grocery blends and traditional espresso blends, where a share of robusta adds crema, body and caffeine at a lower price.

Is Colombian coffee arabica?

Almost always. Colombia grows almost exclusively arabica, much of it high in the Andes. Supremo, a word you will see on Colombian bags, is a grade for the largest bean size, not a species.

Does "100% arabica" mean the coffee is fresh?

No. It only tells you the species. Look for a roast date and buy coffee that was roasted recently. Ours ships within days of roasting in nearly all cases.

Does Der Hoffskeller use any robusta?

No. Our coffee is 100% Colombian Supremo Arabica, with no robusta, no filler and nothing added.

One species, one coffee

Arabica for smoothness, robusta for price, crema and caffeine: both have a place. Our coffee guides cover choosing, brewing and buying coffee, one plain question at a time.