How Much Caffeine Is in Espresso?

If you’ve ever wondered just how much caffeine is in your morning espresso—or whether that double shot is pushing your daily limit—you’re not alone. Caffeine content is one of the most frequently asked questions among coffee drinkers, especially when it comes to concentrated brews like espresso. But the actual numbers can surprise you.

The short answer: a typical 30ml shot of espresso contains roughly 52.1mg of caffeine (based on 173.6mg per 100ml). For most adults weighing around 70kg, a safe daily caffeine intake is between 300–400mg—about 4 to 6 regular cups of coffee. That means one or two espressos can easily fit into a moderate caffeine routine.

How Much Caffeine Is Too Much?

According to health experts, the threshold for a “high dose” of caffeine is around 500mg per day for a 70kg adult—that’s roughly equivalent to six to eight cups of instant coffee. A “moderate” caffeine intake is considered to be about 300 to 400mg daily, or roughly four to six cups. Going over that regularly may lead to side effects like jitters, insomnia, or increased heart rate, depending on your metabolism.

Caffeine Content in Common Drinks (per 100ml)

Here’s how espresso stacks up against other popular caffeinated beverages, measured per 100ml:

• Espresso Coffee: 173.6mg
• Energy Drink (Red Bull): 32mg
• Energy Shot (Red Bull Energy Shot): 133.3mg
• Energy Drink (Lift Plus): 14.5mg
• Energy Drink (Pepsi Max): 19.4mg
• Energy Drink (Diet Pepsi): 10.1mg
• Coca-Cola: 9.7mg
• Diet Coke: 12.7mg
• Instant Coffee: 24.1mg
• Plunger (Pour-Over) Coffee: 45.4mg
• Decaf (Instant) Coffee: 1.1mg
• Tea (White): 6.3mg
• V Pocket Rocket Energy Shot (AU): 266.5mg

As you can see, espresso is at the very top of the list in terms of caffeine concentration per 100ml. However, because espresso servings are small (usually 30ml), the total caffeine per shot remains lower than several larger cups of other caffeinated drinks.

What Determines Caffeine Levels in Coffee?

Caffeine content varies based on several factors, including coffee type, brew method, and serving size. Espresso is highly concentrated, but because it’s served in small volumes, the total caffeine per shot is less than you might get from a full mug of drip or instant coffee. Meanwhile, decaf coffee still contains a small amount of caffeine—about 1.1mg per 100ml. Even among non-coffee drinks, energy shots and certain sodas can pack a significant caffeine punch.

Frequently Asked Questions

How much caffeine is in a single shot of espresso?

A standard 30ml shot of espresso contains approximately 52.1mg of caffeine, calculated from the rate of 173.6mg per 100ml. This makes it one of the most caffeine-dense beverages by volume, though the small serving size keeps the total amount lower than a full cup of other brews.

Is espresso stronger in caffeine than regular coffee?

Espresso has a higher concentration of caffeine per millilitre, but a typical single shot (30ml) contains less total caffeine—around 52mg—than a standard 240ml cup of drip coffee, which can have 95mg or more. So espresso is stronger by volume, but not necessarily in total caffeine per serving.

How much caffeine is safe to consume per day?

For a 70kg adult, a moderate caffeine intake is around 300 to 400mg per day—about 4 to 6 cups of coffee. A high dose is considered to be around 500mg per day, or roughly 6 to 8 cups of instant coffee. Individual tolerance varies based on metabolism and sensitivity.

Does decaf coffee contain no caffeine?

No. Decaf coffee still contains a small amount of caffeine—about 1.1mg per 100ml according to the data. While it’s significantly lower than regular coffee, it’s not entirely caffeine-free.

Why does espresso have more caffeine per ml than other brews?

Espresso is brewed under high pressure with a fine grind, which extracts caffeine more intensely into a small volume. That results in a much higher concentration per millilitre compared to methods like pour-over or French press, though the total caffeine per standard serving may be similar or less.

Recommended FrontStreet Blends for Espresso

For making espresso, FrontStreet Coffee’s Classic Blend is a top choice, offering rich crema and a balanced, approachable profile ideal for milk drinks like lattes and cappuccinos. If you're after deeper chocolatey tones and great value, the Black Cocoa Blend delivers a full-bodied, smooth shot with excellent crema—perfect for cafés watching costs. For a more traditional espresso taste, the Specialty Blend combines Brazilian and Colombian beans for a classic profile reminiscent of old-school Italian-style coffee. All three are designed specifically for espresso machines and milk-based drinks. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.