How Much Caffeine Is in Coffee? Espresso, Cold Brew, Decaf

A single shot of espresso has about 63 mg of caffeine, and a double shot has about 125 mg. A double shot is just two single shots pulled together, so the caffeine doubles right along with it.

Espresso feels stronger than an 8 oz cup of drip coffee, but it isn't higher in total caffeine. A single shot is only about 1 fluid ounce, while a standard drip coffee is 8 fluid ounces holding about 95 mg. An 8 oz drip coffee actually beats a single espresso shot on total caffeine; espresso only wins on concentration per ounce.

A double shot of espresso comes from an 18 to 20 gram dose of ground coffee packed into the portafilter basket. A ristretto uses that same 18 to 20 gram dose, just with less water. It carries roughly the same caffeine as a full espresso shot. The dose sets the caffeine; the water volume just changes strength and mouthfeel.

I pulled a lot of ristrettos behind the bar, and customers almost always assumed the smaller pour meant less caffeine. It doesn't. Same grounds, same dose, just less water run through them.

If you want more control over that extraction, our how to dial in espresso guide covers grind, dose, and shot time, and our espresso grind size guide breaks down how grind affects extraction speed.

A latte, cappuccino, or flat white carries the caffeine of the shot count it's built on, not its cup size. One shot of espresso is about 63 mg, and two shots are about 125 mg. That's true whether it goes into an 8 oz cup or a 20 oz cup.

A 16 oz latte built on a double shot has the same 125 mg as a 2 oz macchiato built on that same double shot. Steamed milk changes taste, texture, and calories, not caffeine. It dilutes the coffee flavor you taste, but it doesn't touch the milligrams in the cup.

The common misread is assuming a bigger latte means a stronger, more caffeinated drink. A 20 oz latte only beats a 12 oz latte on caffeine if the barista added an extra shot. Order size alone changes how much milk and foam you get, not how much caffeine you get.

I had regulars who ordered a small cappuccino thinking they were dialing back their caffeine for the afternoon. They weren't. Same double shot as their usual large latte, just less milk around it.

See how this plays out across the whole espresso drink family in our cappuccino vs latte and flat white vs latte comparisons, our macchiato vs latte breakdown, and our what is a cortado guide.

An 8 oz cup of drip coffee has about 95 mg of caffeine as a standard average. Real cups run far wider than that number suggests.

A 12 oz cup is closer to what most people actually drink. A 12 oz cup of brewed coffee contains 113 to 247 mg of caffeine, according to the National Coffee Association. The FDA lists that same 113 to 247 mg range for a 12 oz cup of regular brewed, non-specialty coffee.

The gap between 113 mg and 247 mg comes down to four variables: coffee-to-water ratio, bean species, grind size, and contact time. A heavier dose of grounds, a Robusta blend, a finer grind, or a longer brew all push the number toward the high end.

A 12 oz cup from a diner or a to-go counter isn't the 8 oz cup the 95 mg average is built on. Ordering a "medium" or "large" coffee usually means more caffeine than that oft-quoted 95 mg figure, simply because the cup holds more liquid.

I watched two pots brewed from the same bag of beans taste completely different depending on how long they'd been sitting on the burner. The 95 mg number is a starting point, not a guarantee.

Our coffee-to-water ratio guide and our science of coffee extraction guide both cover how these variables shift the strength and caffeine of a cup.

Cold brew's caffeine comes from how it's made, not from the cold water itself. It's brewed as a concentrate at a 1:4 to 1:5 coffee-to-water ratio, steeped for about 12 hours, according to the National Coffee Association. Drip coffee uses roughly a 1:16 ratio by comparison. The cold brew concentrate carries several times more caffeine per ounce than an equal volume of drip.

The long steep time, not the cold water, is why the caffeine climbs so high. A typical 16 oz ready-to-drink cold brew serving lands around 200 mg of caffeine, but treat that as typical, not fixed.

Cold brew is the least predictable format on this page, because what lands in your cup depends entirely on how much you dilute the concentrate. Cut it 1:1 with water or milk and a 16 oz serving lands around that 200 mg mark. Drink the concentrate neat and the caffeine runs far higher. Every shop and every recipe dilutes differently, so there's no single authoritative number for a cup of cold brew the way there is for espresso.

This is the question I got asked most often behind the bar, because customers assumed cold meant gentle. It's usually the opposite. The long steep is doing far more work than the temperature ever does.

Most Nespresso Original and Vertuo espressos contain 50 to 100 mg of caffeine per cup, according to Nespresso's official FAQ. This covers Original Espressos and Espresso Lungos, plus Vertuo Espressos, Gran Lungos, and Double Espressos.

Vertuo coffee pods break that range wide open. A Vertuo coffee (7.77 oz), including the 14 oz XL size, has 170 to 200 mg of caffeine per cup. The capsule holds more ground coffee brewed into more liquid.

A few pods run higher because of their Robusta content. Vertuo Espresso Diavolitto has 150 mg per cup, Original Kazaar has 120 mg, and the Nespresso Professional Ristretto Intenso also has 120 mg. The Carafe Pour-Over Style (18 oz) capsule contains over 200 mg per complete serving.

Caffeine varies with how much Robusta a capsule contains, since Robusta has roughly twice the caffeine of Arabica. The quantity of ground coffee packed into each capsule matters too.

Nespresso's Vertuo machines read a barcode printed on each capsule's rim to set the exact water volume for that pod, a system called Centrifusion. That's how the same machine can pull a small Vertuo espresso and a full 14 oz Vertuo XL from two different capsules without you setting anything manually.

Our best Nespresso machines guide rounds up the top picks, and our Nespresso Vertuo vs Original guide breaks down which pod system fits your routine. Read our full Nespresso VertuoPlus vs Next review for a closer look at the VertuoPlus specifically.

Keurig puts K-Cup coffee at 75 to 150 mg per 8 oz cup, on par with regular brewed coffee.

Keurig explains that varying the brew size does not affect the amount of caffeine in your cup, because the coffee in each pod is pre-measured. A larger cup holds more liquid, not more coffee.

Brewing a K-Cup at 12 oz instead of 6 oz doesn't give you more caffeine. It gives you the same caffeine spread across twice the water, so the drink tastes weaker but holds the same milligrams. The pod's fixed dose sets the caffeine ceiling, not the cup size you choose.

The Keurig K-Elite's Strong Brew option doesn't add more caffeine either. The pod still holds the same pre-measured grounds, so Strong Brew changes how concentrated and bold the cup tastes, not how much coffee went into it. If you want more caffeine from a Keurig, the lever is the pod, not the cup size or the Strong Brew button. Brew two pods, or buy pods labelled extra bold, which pack more grounds.

I get this question weekly: why doesn't my travel-mug setting feel stronger? Now you know why. It's the same coffee, just spread thinner.

Our best Keurig coffee makers guide and our best single-serve coffee makers 2026 roundup cover the full K-Cup lineup. Our Nespresso vs Keurig comparison breaks down how the two pod systems differ, and our Cuisinart SS-10P1 review looks at a single-serve machine outside the Keurig ecosystem.

Decaf coffee is not caffeine-free. A typical 8 oz cup of decaf has 2 to 15 mg of caffeine, because decaffeination removes around 97% of the caffeine, not all of it.

Put that in perspective against a regular cup: an 8 oz cup of caffeinated coffee has about 95 mg. Even at the strong end of the decaf range, 15 mg a cup, you'd need six or seven cups of decaf to match one regular coffee. At the low end of 2 mg, it would take more than 40.

Nespresso decaf sits at the strict end of that range. The company removes over 99.9% of the caffeine from its decaf capsules, using water decaffeination and a carbon dioxide method. That's well beyond the roughly 97% industry norm.

Four variables set the caffeine in any cup: bean species, roast level, dose, and contact time.

The FDA says 400 mg of caffeine a day is an amount not generally associated with negative effects for most healthy adults.

Here's the accuracy gap most articles miss. The FDA now describes that 400 mg as about two to three 12-fluid-ounce cups of coffee. That's not the "four or five cups" figure still repeated across the web, and that older wording predates the FDA's current guidance.

The math explains why the FDA moved to a smaller cup count. Three 12 oz cups of brewed coffee, at the FDA's own 113 to 247 mg range, add up to 339 to 741 mg. Four or five cups at that same range could push well past 400 mg before lunch.

The FDA also lists how other 12 oz drinks compare. Black tea has 71 mg and green tea has 37 mg. A caffeinated soft drink has 23 to 83 mg, and an energy drink has 41 to 246 mg.

The FDA notes that people vary widely in how sensitive they are to caffeine and how fast their bodies clear it. The agency also advises anyone who is pregnant, trying to become pregnant, or breastfeeding to talk with a health care provider about limiting caffeine. That's the FDA's own guidance, not medical advice from us.

I didn't do this arithmetic myself until I started writing this article, and it changed how I think about a third afternoon coffee.