It is 4 pm, you have already had a cup in the morning and another at work, and someone offers you one more. Is that too much? To answer it, you first need to know how much caffeine is in a cup of coffee, and the honest answer is “it depends on the cup.” This guide from Cohoma Coffee gives you the numbers in milligrams for every common type of coffee, explains why they vary, and shows you how to estimate the caffeine in your own cup.
Quick Answer: How Much Caffeine Is in a Cup of Coffee?
A standard 8-ounce (240 ml) cup of brewed coffee has about 95 mg of caffeine on average, and typically between 80 and 100 mg, though it can range from about 70 to 200 mg depending on the beans, brew and strength. A single espresso shot has about 63 mg, instant coffee about 60 mg, cold brew about 100 to 200 mg per 240 ml, and decaf only 2 to 7 mg.
Caffeine in Coffee by Type (mg Chart)
| Coffee type | Serving size | Typical caffeine |
|---|---|---|
| Brewed or drip coffee | 240 ml (8 oz) | About 95 mg (range 70 to 200 mg) |
| Pour-over or French press | 240 ml (8 oz) | About 80 to 120 mg |
| Espresso, single shot | 30 ml (1 oz) | About 63 mg (range 47 to 75 mg) |
| Espresso, double shot | 60 ml (2 oz) | About 125 mg |
| Latte or cappuccino made with one shot | 150 to 350 ml | About 63 mg, same as the shot |
| Instant coffee | 240 ml (8 oz) | About 60 mg (range 30 to 90 mg) |
| Cold brew, ready to drink | 240 ml (8 oz) | About 100 to 200 mg, more if it is a concentrate |
| South Indian filter coffee (small tumbler) | About 150 ml | Roughly 70 to 150 mg, depending on chicory and blend |
| Decaf brewed coffee | 240 ml (8 oz) | About 2 to 7 mg (up to about 15 mg in some cases) |
Treat these numbers as a guide, not a lab result. The caffeine in your particular cup can easily be half or double the average.
Why a Small Cup Can Hit Harder Than a Big One
Caffeine strength per millilitre and caffeine per serving are two different things. Espresso is the most concentrated coffee you can drink, but a shot is only 30 ml, so one shot (about 63 mg) has less caffeine than a full mug of brewed coffee (about 95 mg). The reverse also happens: a small tumbler of strong filter coffee can match a big mug of drip coffee in half the volume, because the decoction is so concentrated.
Milk does not change this. A small cappuccino and a large latte made with the same single shot contain about the same caffeine, because milk adds none. Only extra shots add more.
Coffee Shop Cups Are Much Bigger Than “One Cup”
The “standard cup” in nutrition tables is 8 ounces, but cafe cups and home mugs are often much larger. A 12-ounce (355 ml) brewed coffee typically contains 113 to 247 mg. A large 16-ounce (475 ml) cup from a coffee-shop chain can reach 300 to 400 mg or more, which is close to a whole day’s recommended limit in one drink. If you drink out of a big mug, multiply the 8-ounce numbers accordingly.
What Changes the Caffeine in Your Cup?
- The type of bean. This is one of the biggest factors. Arabica beans contain about 1.5% caffeine, while Robusta contains about 2.7%, so a Robusta-heavy blend can carry nearly twice as much. Read the difference between Arabica and Robusta for the full comparison.
- How much coffee you use. More coffee per cup means more caffeine. Dose matters more than almost anything else.
- Brew time and method. Longer contact between water and coffee extracts more caffeine. This is why drip and cold brew can be stronger than a quick brew.
- Grind size. Finer grinds release caffeine faster, which is why espresso is so concentrated.
- Water temperature. Cooler water tends to extract more slowly, though a long soak can make up for it.
- Cup size. A 150 ml tumbler and a 450 ml cafe cup are not comparable.
- Growing region and roast. Origin can change the natural caffeine level a little. Roast level has only a small effect compared with dose and bean type, so a darker roast does not mean less caffeine in any meaningful way.
How to Estimate the Caffeine in Your Own Cup
As a rough rule, brewed coffee gives about 7 to 10 mg of caffeine for every gram of ground Arabica coffee used. So if your recipe uses 12 g of coffee, you are looking at roughly 85 to 120 mg. With a Robusta blend, expect more. Chicory contains no caffeine at all, so a filter coffee blend with a lot of chicory in it will have less caffeine than a pure coffee blend using the same weight of powder.
If you like to measure, a small scale and a few good coffee brewing accessories help you keep your dose, and your caffeine, consistent from day to day.
Is Decaf Really Caffeine-Free?
No. Decaf removes most of the caffeine, not all of it. A typical cup has about 2 to 7 mg, which is tiny compared with the roughly 95 mg in regular brewed coffee, but it is not zero. If you are very sensitive to caffeine or avoid it for medical advice, keep that in mind. Our Colombian Decaf roast is a good choice when you want the coffee ritual without the buzz.
How Much Caffeine Is in Cold Brew?
Cold brew can contain more caffeine than hot brewed coffee, mainly because it is steeped for a long time and often made as a strong concentrate. A ready-to-drink serving usually lands around 100 to 200 mg per 240 ml, and a 355 ml glass of undiluted concentrate can exceed 240 mg. If you dilute the concentrate with water or milk, the caffeine in your glass drops accordingly.
If you want to know more, read what cold brew coffee is, or learn to make cold coffee at home without a machine and control the strength yourself. To explore ready-made options, browse our cold brew coffee range:
- Original Custom Roast Cold Brew
- Cinnamon Hazelnut Cold Brew
- French Vanilla Cold Brew
- Organic Peppermint Cold Brew
- Colombian Decaf Cold Brew
- Signature Flavours Trio Cold Brew
Caffeine Across Different Coffee Formats
The way coffee reaches your cup also shapes how much caffeine you get, mainly through the dose per serving:
Roasted Coffee Beans
With roasted coffee beans you control the dose, the grind and the brew, so you control the caffeine. Read how to buy fresh roasted coffee beans before you choose. Popular picks include:
Coffee Capsules
Capsules give you a fixed dose in every cup, which makes your daily caffeine easy to predict. See how coffee capsules work, then browse our coffee capsules:
- Original Custom Roast
- French Vanilla
- Cinnamon Hazelnut
- Organic Peppermint
- Colombian Decaf
- Capsule Machine
Coffee Bags
Single-serve coffee bags are another easy way to keep your serving, and your caffeine, consistent:
- Original Custom Roast Coffee (10 Bags)
- Cinnamon Hazelnut Coffee (10 Bags)
- French Vanilla Coffee (10 Bags)
- Signature Flavours Trio (10 Bags)
- Signature Flavours Trio (3×10 Bags)
Coffee on the Go
Travel mugs hold more than you think. If you carry coffee with you, check the size of your on-the-go coffee cups, because a big flask can quietly hold two or three servings of caffeine.
For the full list of brewing options, see the best way to brew coffee at home.
How Much Caffeine Is Safe in a Day?
For most healthy adults, up to 400 mg of caffeine a day is generally considered safe by health authorities such as the FDA and the European Food Safety Authority. In practice that is about four mugs of brewed coffee at roughly 95 mg each, but only two or three cafe-sized cups, or three to five small tumblers of filter coffee depending on the blend.
- Pregnancy and breastfeeding: guidance is lower, around 200 mg a day, and you should talk to your doctor about your own limit.
- Children and teenagers: caffeine is best avoided in young children and limited in teenagers.
- Sensitivity varies: genetics and habit change how strongly you feel caffeine. If you feel jittery, anxious or cannot sleep, your personal limit is lower than the general guideline.
- Medical conditions: if you have a heart condition, anxiety, acid reflux or take regular medication, check with your doctor.
How Long Does Caffeine Last?
Caffeine usually starts working within 15 to 45 minutes and peaks in your blood within about an hour. The effects can last four to six hours, and its half-life is around five hours, so half of your 3 pm coffee is still in your body at 8 pm. If you sleep badly, finish your last regular coffee about eight hours before bed.
Signs You May Have Had Too Much Caffeine
- Racing heartbeat or palpitations
- Restlessness, shaking or anxiety
- Trouble sleeping
- Headaches or dizziness
- Stomach discomfort or frequent urination
Easy Ways to Cut Caffeine Without Giving Up Coffee
- Make the cup smaller, not weaker. A small, properly strong cup tastes better than a big watery one.
- Drink it earlier. Keep your last regular cup to the morning or early afternoon.
- Switch your last cup to decaf. You keep the taste and the habit.
- Dilute cold brew. Treat concentrate as a base and add water or milk.
- Count your cups by size, not by number.
Planning Coffee for a Group
When you serve coffee to many people, remember that guests drink different amounts and some avoid caffeine, so offer both regular and decaf. If you run a workplace or cafe, see our offices and cafes page. Planning coffee for weddings? We can help with that too. And if you are choosing a present, browse coffee gifting.
Final Thoughts
An average cup of brewed coffee has about 95 mg of caffeine, but your real number depends on the bean, the dose, the brew and the size of your cup. Know your usual serving, keep your daily total under about 400 mg unless your doctor advises otherwise, and pay attention to how your own body feels. For fresh beans, capsules, coffee bags and cold brew you can measure with confidence, explore Cohoma Coffee.
This article is general information, not medical advice. Talk to a doctor about the right caffeine limit for you.
Frequently Asked Questions (FAQs)
1. How much caffeine is in a cup of coffee?
An 8-ounce (240 ml) cup of brewed coffee has about 95 mg of caffeine on average, usually between 80 and 100 mg. Depending on the beans, brewing method and strength, it can range from about 70 to 200 mg.
2. How much caffeine is in a shot of espresso?
A single 30 ml shot of espresso has about 63 mg of caffeine, and a double shot has about 125 mg. Espresso is more concentrated per millilitre than brewed coffee, but a serving is much smaller.
3. How much caffeine is in instant coffee?
Instant coffee usually has about 60 mg of caffeine per 240 ml cup, with a typical range of roughly 30 to 90 mg depending on how much powder you use.
4. How much caffeine is in cold brew coffee?
Cold brew typically contains about 100 to 200 mg of caffeine per 240 ml serving, and more if it is an undiluted concentrate. Adding water or milk lowers the caffeine in your glass.
5. How much caffeine is in decaf coffee?
Decaf coffee is not completely caffeine-free. A cup usually has about 2 to 7 mg of caffeine, compared with about 95 mg in regular brewed coffee.
6. Does a latte or cappuccino have more caffeine than black coffee?
Not necessarily. A latte or cappuccino has the same caffeine as the espresso shots in it, because milk adds none. A single-shot latte has about 63 mg, which is less than a mug of brewed coffee.
7. Does Arabica or Robusta have more caffeine?
Robusta has more caffeine, about 2.7% compared with about 1.5% in Arabica. A blend that includes Robusta can have nearly twice the caffeine of a pure Arabica coffee made with the same amount.
8. Does dark roast have less caffeine than light roast?
The difference is small. Roast level changes flavour much more than caffeine, so the amount of coffee you use and how you brew it matter far more than the roast colour.
9. How much caffeine is too much in a day?
For most healthy adults, up to 400 mg per day is considered safe, which is about four mugs of brewed coffee. Pregnant and breastfeeding women are usually advised to stay around 200 mg a day, and sensitive people may need to stay lower.
10. How long does caffeine from coffee stay in your body?
Caffeine peaks in your blood within about an hour and its effects usually last four to six hours. Its half-life is around five hours, so some caffeine can remain in your system into the evening.
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