Caffeine Content in Espresso, Instant Coffee, and Tea

You’ve probably wondered: just how much caffeine is really in that shot of espresso, cup of instant coffee, or can of cola? Whether you’re watching your intake or just curious, knowing the exact caffeine levels in everyday drinks helps you make informed choices without guessing.

For a 70kg adult, a safe daily caffeine limit is up to 500mg — about 6–8 instant coffees. A moderate intake is 300–400mg, roughly 4–6 cups of coffee. Here’s how your favorite drinks stack up per 100ml.

Caffeine Content Per 100ml: Exact Numbers

These are the measured caffeine levels in common beverages, based on 100 milliliters:

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

What Is a Safe Daily Caffeine Intake?

According to health experts like Karen Dickinson of Body Acoustics Health and Sports Nutrition, a high daily caffeine dose is around 500mg — equivalent to 6–8 cups of instant coffee. For most people, a moderate and safe range is 300–400mg per day, or about 4–6 cups of regular brewed coffee. For a 70kg adult, staying under 500mg is the general guideline.

Espresso vs. Other Coffee Drinks: Why the Big Difference?

Espresso stands out with an intense 173.6mg of caffeine per 100ml — far higher than instant (24.1mg) or pour-over black coffee (45.4mg). That’s because espresso is a concentrated brew made under pressure, extracting more caffeine quickly into a small volume. A single shot is typically 30ml, delivering around 52mg of caffeine. In contrast, instant and filter methods use more water and longer brew times, spreading the caffeine across a larger drink.

Energy Drinks and Cola: How Do They Compare?

Regular cola drinks like Coca-Cola have 9.7mg per 100ml, while Diet Coke contains slightly more at 12.7mg. Energy drinks vary widely: Red Bull has 32mg per 100ml, but a Red Bull Energy Shot packs a punch at 133.3mg per 100ml. Lift Plus and other energy drinks range between 10–15mg. These drinks often combine caffeine with sugar or sweeteners and other stimulants, amplifying their energizing effects.

Decaf and Low-Caffeine Options

Even decaf isn’t entirely caffeine-free. A 100ml serving of instant decaf coffee still contains 1.1mg of caffeine. While this is negligible for most, it’s something to keep in mind if you’re highly sensitive. White tea, at 6.3mg per 100ml, is another low-caffeine option compared to black tea or coffee.

Frequently Asked Questions

How much caffeine is in a single shot of espresso?

A standard 30ml shot of espresso contains approximately 52mg of caffeine, based on the 173.6mg per 100ml measurement. This makes espresso a highly concentrated caffeine source compared to regular drip or instant coffee.

Is instant coffee lower in caffeine than espresso?

Yes. Instant coffee contains 24.1mg of caffeine per 100ml, which is significantly less than espresso’s 173.6mg per 100ml. However, instant coffee is usually consumed in larger volumes, which can add up.

How much caffeine is safe for a 70kg adult per day?

A 70kg adult can safely consume up to 500mg of caffeine per day, which equals roughly 6–8 cups of instant coffee. A moderate and commonly recommended intake is 300–400mg, or about 4–6 cups of coffee.

Which common drinks have more caffeine than tea?

Espresso (173.6mg/100ml), instant coffee (24.1mg/100ml), Red Bull (32mg/100ml), and energy drinks like Red Bull Energy Shot (133.3mg/100ml) all contain more caffeine per 100ml than white tea (6.3mg/100ml) or black tea.

Does decaf coffee contain zero caffeine?

No. Decaf coffee still contains a small amount of caffeine. For example, instant decaf coffee has 1.1mg of caffeine per 100ml, which is very low but not caffeine-free.

Recommended FrontStreet Blends for Espresso Lovers

For espresso-based drinks, FrontStreet Coffee’s Classic Blend delivers rich body and velvety crema, ideal for lattes and cappuccinos. Its traditional Mann-Man blend offers smooth, approachable flavors. For deeper intensity, try the Black Cocoa Blend—100% Arabica with bold, chocolatey notes and solid crema, great for cost-conscious shops. The Commercial Blend is another reliable workhorse with balanced flavor and cost efficiency. All three are optimized for espresso machines and deliver consistent results. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.