Espresso is a small, strong cup of coffee that many people enjoy for its quick jolt of energy and bold taste. While some believe that this tiny cup is loaded with more caffeine than regular coffee, the facts might surprise you: a single shot of espresso often contains less total caffeine than a standard cup of drip coffee, despite being more concentrated. This guide will explain how much caffeine is in espresso, what influences its strength, and how it compares to other coffee drinks.
How Much Caffeine Is in Espresso?
Caffeine in a Single Espresso Shot
A standard single shot of espresso is about 1 ounce (30 ml) and typically has between 63 and 75 milligrams of caffeine. Although it tastes strong and is served in a small amount, this is actually a bit less caffeine than a regular cup of drip coffee. For example, a Starbucks single shot contains about 75mg of caffeine.
People often think espresso is extremely high in caffeine because of its bold taste and the way you drink it quickly. The quick, strong flavor can make the caffeine feel more noticeable than when you sip a bigger mug of brewed coffee more slowly.
Caffeine in Double or Multiple Shots
Most espresso drinks use at least a double shot, called a “doppio.” A double shot (about 2 ounces or 60 ml) has about 126 to 150 milligrams of caffeine; Starbucks, for instance, lists a double shot at 150mg.
Some places offer triple shots (about 189mg) or even quad shots (about 252mg). While these pack a big caffeine punch, too much at once can make some people feel jittery or restless. Notice how your body reacts so you can find the right amount for you.
Espresso vs. Drip Coffee: Caffeine Comparison
Although espresso is strong by the ounce, a single shot (1 ounce, 63-75mg) doesn’t have as much total caffeine as a cup of brewed coffee (8 ounces, around 95-96mg on average). Here’s how it breaks down:
| Beverage | Serving Size | Caffeine (Average) |
|---|---|---|
| Espresso, single shot | 1 oz (30 ml) | 63-75 mg |
| Espresso, double shot | 2 oz (60 ml) | 126-150 mg |
| Drip coffee | 8 oz (240 ml) | 95-96 mg |
Ounce per ounce, espresso is stronger, but a regular serving of drip coffee usually has more total caffeine.
Which Factors Affect Caffeine in Espresso?
The amount of caffeine in espresso isn’t always the same. Several things can change how much caffeine ends up in your shot:
- Type of coffee bean
- Roast level
- Grind size and amount used
- Extraction time and machine pressure
Arabica vs. Robusta Beans
The kind of coffee bean matters. Arabica beans (used in most coffee shops) have less caffeine and a smoother flavor. Robusta beans have almost twice as much caffeine and a more bitter taste. Some espresso blends include Robusta for an extra caffeine kick and thicker crema on top.
Light vs. Dark Roast
Many think dark roasts have more caffeine, but light roasts often have a little more because longer roasting tends to reduce caffeine slightly. Usually, the difference is just a few milligrams. “Espresso roast” beans are darker for stronger flavor, not more caffeine.
Grind and Dose
Espresso needs finely ground coffee. Finer grinds let water draw out more caffeine in a short time. The more coffee grounds you use, the more caffeine your shot can have.
Extraction Time and Pressure
Pulling an espresso shot usually takes 25-30 seconds. More time lets more caffeine get extracted. Espresso machines also use strong pressure (about 9 bars). Both longer extraction and higher pressure can give you more caffeine, but too much can taste bitter.
Caffeine in Espresso-Based Drinks
Many café drinks are made with espresso plus milk or water, so the caffeine amount changes:
| Drink | Typical Espresso Shots | Caffeine (Approx.) |
|---|---|---|
| Cappuccino, Latte, Flat White (grande size) | 2 | 126-150 mg |
| Americano (grande size) | 3 | 225 mg |
| Macchiato (single) | 1 | 63-75 mg |
| Cortado (double) | 2 | 126-150 mg |
Some Chain Examples
- Starbucks: Single shot = 75mg; double shot = 150mg. Most large espresso drinks have a double shot.
- Dunkin’: Single shot = 75mg; double shot = 97mg.
- Costa Coffee: Single shot = 92mg; double shot = 185mg.
- Caribou Coffee: Medium espresso = 270mg (likely triple/quad shot).
If you’re counting caffeine, ask your barista or check the menu for exact numbers at your local café.
Does Decaf Espresso Have Caffeine?
Even decaf espresso isn’t completely free of caffeine. The decaf process gets rid of most caffeine, but not all.
One shot of decaf espresso usually has 3-8 mg of caffeine, but can be as high as about 16 mg. An 8-ounce cup of decaf drip coffee has 2-12 mg. While this is very little, people who are sensitive to caffeine or avoiding it completely should be aware there’s still a small amount left.
Common Espresso and Caffeine Myths
Myth: Espresso Always Has More Caffeine Than Coffee
Many people think espresso packs the most caffeine, but a regular cup of coffee usually has more in total. Espresso has more caffeine by ounce, but a full mug of drip coffee gives you a bigger amount overall.
Myth: Darker Roasts Mean More Caffeine
Actually, lighter roasts tend to keep a bit more caffeine, although the difference is small. The main reason for choosing a roast is taste, not caffeine level.
Myth: Every Espresso Shot Has the Same Caffeine
Caffeine can change a lot from one shot to the next, depending on the beans, grind, amount used, machine settings, and even how skilled the barista is. A longer extraction (lungo) will pull out more caffeine than a short one (ristretto).
How Does Espresso’s Caffeine Affect You?
How Your Body Uses Caffeine
Caffeine enters your bloodstream quickly-often within 15 minutes. It blocks signals in the brain that make you feel sleepy, making you more alert and focused. Because espresso is concentrated and often drunk quickly, the energy rush can feel fast and strong. The main effects usually peak in 30-60 minutes and last a few hours, depending on your metabolism.
How Much Espresso Is Safe?
The safe daily limit for healthy adults is about 400 mg of caffeine-that’s about 6-7 espresso shots or 3-4 double shots. Pregnant people, those breastfeeding, or anyone with certain health conditions should have less. Side effects of too much caffeine include jitters, rapid heart rate, stomach upset, or trouble sleeping.
Why Caffeine Affects People Differently
How you react to caffeine depends on your genes, age, body weight, and how often you drink it. Some people break down caffeine quickly and feel fewer effects; others are sensitive and feel them longer. Eating food before coffee, how much sleep you get, and stress in your life also change your response. Pay attention to how your body feels and adjust your intake as needed.
Frequently Asked Questions
How many espresso shots can I safely have in a day?
Most adults can handle up to 400mg a day (about 6 single shots or 3 double shots), but you might need less, depending on how you feel. Add caffeine from all your drinks and even medicine or chocolate, too.
Does every espresso machine make shots with the same caffeine?
No, different machines and baristas may produce shots with slightly different caffeine amounts. It depends on:
- Pressure (should be about 9 bars)
- Water temperature (195-205°F/90-96°C)
- Grind and tamping (how evenly and firmly the grounds are packed)
- Extraction time (usually 25-30 seconds for a good shot)
Home machines or coffee pods can vary even more. Use average caffeine numbers as a guide, but remember there may be small changes with each cup.
