Fourteener Coffee Club
Light roast vs dark roast, in short
A light roast leaves the roaster early, around first crack, and tastes brighter and lighter, with more of the farm's own flavor. A dark roast stays in until second crack or past it, and tastes fuller, bittersweet and roasty, with little of the origin left. Caffeine is close to equal by weight; by the scoop, a light roast has a little more.
Neither is better coffee. They answer different questions: a light roast asks what this farm tastes like, and a dark roast asks what this roaster does with heat. The rest of this page explains the differences and how to choose.
The differences side by side
| Light roast | Dark roast | |
|---|---|---|
| Where the roast ends | Around first crack, about 196 °C (385 °F) | Past second crack, which starts about 224 °C (435 °F); Wikipedia lists dark at 240 °C (464 °F) |
| Bean surface | Dry | Shiny with oil |
| Body | Lighter | Full |
| Acidity | Higher | Lower |
| Flavor | No obvious roast flavor; origin character comes through | Bittersweet; roast flavor leads; little origin character |
| Caffeine per scoop | A little more, because the beans are denser | A little less |
| Caffeine per gram | About the same | About the same |
| Best shown off by | Black filter coffee: pour over, Chemex, drip | Coffee with milk, French press, a stovetop moka pot |
The first seven rows come from Wikipedia's article on coffee roasting. The last row is our own brewing advice. Medium roast sits between the two; see medium roast.
Does dark roast have more caffeine?
No. Wikipedia's roasting article calls that a common misconception and says caffeine levels are not significantly affected by the roast. What changes is the bean. Roasting drives out water and puffs the bean up, so a dark bean is larger and less dense than a light one. Scoop by volume and a light roast gives you slightly more caffeine; weigh by the gram and the two come out about even.
The strong taste of a dark roast comes from the roasting itself. For less caffeine, choose a decaf or a half caff; the roast level barely moves it.
How to choose, and how to brew each
Choose a light roast if you drink coffee black and want each bag to taste different. Wikipedia describes it as the level for tasting a coffee's full origin: variety, processing, altitude, soil and weather. Brew it by hand, with water in the 194 to 205 °F range the National Coffee Association gives for pour over, and taste it as it cools.
Choose a dark roast if you take milk, like a heavier cup, or want the same comforting taste every morning. Roast flavor stands up to cream and to a French press.
Espresso is not a reason to pick either. Wikipedia's espresso article calls it a myth that espresso needs dark beans: any roast level works. It notes that southern Italy prefers darker roasts, northern Italy slightly lighter ones, and that outside Italy a wide range is popular.
One brewing note for Colorado: light roasts are denser, and water boils cooler here. Wikipedia's high-altitude cooking page puts the boiling point at about 203 °F at 5,000 feet. If a light roast tastes thin or flat in the mountains, grind finer and pour straight off the boil; the NCA links a flat cup to a grind that is too coarse.
Colorado roasters that sell both ends
The easiest way to learn the difference is to try one roaster's light and dark side by side. These roasters we list label both on their own shops, checked September 27, 2026. They are local favorites, and a listing does not mean the roaster is part of the club.
| Roaster | Town | Light | Dark |
|---|---|---|---|
| Kaladi | Englewood | Ethiopia Yirgacheffe Oromia | Colombia Supremo Sur de Huila, sold in medium and dark |
| OZO | Boulder | Organic Breakfast Blend | Ursa Major |
| Wagon | Denver | First Light (East Java); Clean and Sober (Ethiopia) | Four Horsemen (Ethiopia and Brazil) |
| Camp 4 | Crested Butte | A light European style blend of Colombia and Guatemala | Art of Darkness, a French roast |
| Color | Eagle | Light roasts in its shop | Eclipse, a dark blend made for home espresso |
Kaladi's same Colombia in two roast levels is the cleanest experiment on the list: one farm region, two roasts, nothing else changed. Buying the pair from a Colorado roaster also keeps the money with a roaster and crew in this state. Why local roasters matter.
When one house drinks both
Plenty of kitchens have a light roast drinker and a dark roast drinker. In the Fourteener Coffee Club plan builder you can choose two bags a box and give the second bag its own roast, so one person gets a light single origin and the other a dark blend, each from that box's Colorado roaster. Roast level can also be set to mix. Bags are 12 oz and $16.99 each, and the first bag is free with $7.99 shipping on that first box.
Light and dark roast questions
Is dark roast stronger than light roast?
Dark roast tastes stronger, but strength in the cup comes from how much coffee you use for the water, not from the roast. A light roast brewed at 1:13 is a stronger cup than a dark roast brewed at 1:16; see our pour over coffee ratio guide.
Is light roast more acidic?
Yes, in taste. Wikipedia's roasting article describes light roasts as higher in acidity, and says acidity is muted by the time a coffee reaches a medium roast.
What is medium roast, then?
The middle step, taken to about 219 °C (426 °F) in Wikipedia's table: sugars are further caramelized, acidity is muted, the body is fuller and some roast flavor shows. It is the choice for people who find light roasts too sharp and dark roasts too smoky.
Sources
- Wikipedia, Coffee roasting (roast temperatures, cracks, flavor by roast level, caffeine)
- Wikipedia, Espresso (any roast level, regional preferences in Italy)
- National Coffee Association, Pour-over coffee (water temperature, 93 ± 3 °C)
- Wikipedia, High-altitude cooking (boiling point at 5,000 feet)
- Roaster offerings: each roaster's own shop, as recorded on our roaster profiles, checked 2026-09-27.
By Joe McRose, Fourteener Coffee Club. Updated . Roast temperatures, flavor and caffeine from Wikipedia's coffee roasting article; espresso from Wikipedia's espresso article.