How much caffeine is in a cup of coffee? All types explained!
- March 18, 2026
Coffee, the favourite drink of many, is loved for its rich flavour and energising effect. But what about the amount of caffeine in your cup? Is an espresso really stronger than filter coffee, or does the brewing method make more of a difference? In this article, we dive into the world of caffeine. We explain how many mg of caffeine are found in different types of coffee and what to look out for. That way, you can enjoy your daily cup with confidence!
What exactly is caffeine?
Caffeine is a natural substance found in coffee beans, tea leaves and even cocoa beans. It acts as a stimulant on your central nervous system, helping you feel more alert and energised. Once you drink a cup of coffee, caffeine is quickly absorbed into your bloodstream and reaches your brain within 15 to 30 minutes.
What does caffeine actually do? It blocks a substance in your brain called adenosine, which normally slows down brain activity and makes you feel sleepy. The result? You feel more awake, sharper and sometimes even a little uplifted.
How many mg of caffeine are in a cup of coffee on average?
The caffeine content in coffee can vary quite a bit depending on the type of coffee, how it’s brewed and the size of your cup. Below is an overview of common coffee types:
| Type of coffee | Caffeine (mg average) |
|---|---|
| Espresso (30 ml) | 60-80 mg |
| Filter coffee (120 ml) | 90-120 mg |
| Instant coffee (120 ml) | 60-85 mg |
| Decaf (120 ml) | 2-5 mg |
| Ristretto (20 ml) | 50-65 mg |
| Americano (120 ml) | 60-100 mg |
| Cold brew (240 ml) | 150-240 mg |
| Cappuccino (150 ml) | 60-80 mg |
| Latte (240 ml) | 60-80 mg |
The amount of caffeine in coffee depends on several factors, such as:
- The type of bean: Robusta beans contain roughly twice as much caffeine as Arabica beans.
- The roast level: Lighter roasts often contain slightly more caffeine than darker roasts.
- The brewing method: The longer water is in contact with coffee, the more caffeine is extracted.
With this knowledge, you can make a conscious choice about your caffeine intake. Whether you’re after a strong espresso or a mild decaf, the choice is yours!
Caffeine content in other drinks and foods
Coffee isn’t the only source of caffeine. Many other drinks and foods contain it too. Here are some common examples:
| Product | Caffeine (mg average) |
|---|---|
| Black tea (200 ml) | 30-50 mg |
| Green tea (200 ml) | 20-35 mg |
| Energy drink (250 ml) | 80-100 mg |
| Dark chocolate (50 g) | 20-30 mg |
| Cola (330 ml) | 30-35 mg |
| Decaf tea (200 ml) | 0-5 mg |
How much caffeine is too much?
While caffeine can give you a nice boost, it’s important to enjoy it in moderation. The European Food Safety Authority (EFSA) recommends a maximum daily intake of 400 mg of caffeine for adults. That’s roughly equivalent to:
- 5 cups of filter coffee
- 10 cups of black tea
- 5 energy drinks
For pregnant or breastfeeding women, the recommended limit is lower: up to 200 mg of caffeine per day.
What happens if you consume too much caffeine?
Too much caffeine can lead to:
- Heart palpitations
- Restlessness
- Sleep problems
- Headaches
- Nausea
An acute caffeine “overdose”, where more than 600 mg is consumed in a short time, can even cause more serious symptoms like tremors or panic attacks. Thankfully, this is rare with a normal diet.
Tip: Keep track of how much caffeine you consume daily, especially if you drink tea, cola or energy drinks alongside coffee. That way, you can enjoy your caffeine moments in a healthy way!
Whether you love a strong espresso or prefer a smooth latte, understanding caffeine helps you enjoy your favourite drink even more. So go ahead and take that next sip, knowing exactly what’s in it. Cheers!
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