How Much Caffeine Is in Coffee?
How much caffeine is in coffee? About 95 mg per 8 oz cup. See charts for espresso, cold brew, decaf and cup sizes, plus daily limits and a caffeine calculator.
Updated September 26, 2026
Caffeine Calculator: How Much Caffeine Have You Had Today?
Tap in what you’ve had to drink today and see your total caffeine next to common daily guidelines. Add your body weight for a per-kilogram figure.
Daily caffeine calculator
- Brewed coffee 8 fl oz · ~95 mg
- Espresso shot 1 fl oz · ~63 mg
- Cold brew 12 fl oz · ~155 mg
- Instant coffee 8 fl oz · ~62 mg
- Decaf coffee 8 fl oz · ~2 mg
- Black tea 8 fl oz · ~47 mg
- Green tea 8 fl oz · ~28 mg
- Cola 12 fl oz · ~34 mg
- Energy drink 8.4 fl oz · ~80 mg
Pregnant or breastfeeding?
Total caffeine
190 mg
48% of 400 mg guideline
Within the commonly cited 400 mg/day guideline for healthy adults.
Estimates only — caffeine varies a lot between beans, brew methods and brands. The FDA cites 400 mg/day as an amount not generally associated with negative effects for healthy adults; ACOG advises under 200 mg/day during pregnancy. Sensitivity varies. This is not medical advice; ask your doctor if you have health concerns.
Typical caffeine content by drink
| Drink | Serving | Typical caffeine |
|---|---|---|
| Brewed coffee | 8 fl oz | ~95 mg (70–140 mg) |
| Espresso | 1 fl oz shot | ~63 mg |
| Cold brew | 12 fl oz | ~150–240 mg, highly variable |
| Instant coffee | 8 fl oz | ~60 mg |
| Decaf coffee | 8 fl oz | ~2–15 mg |
| Black tea | 8 fl oz | ~47 mg |
| Green tea | 8 fl oz | ~28 mg |
| Cola | 12 fl oz | ~34 mg |
| Energy drink | 8.4 fl oz | ~80 mg |
Values are typical figures from USDA FoodData Central and product labels; your actual drink may differ a lot. Learn what changes caffeine content in our guide to how much caffeine is in coffee.
Why the same cup can vary so much
- Bean species: Robusta has roughly twice the caffeine of Arabica.
- Brew ratio: More coffee per cup means more caffeine.
- Serving size: Café “small” drinks are often 12 oz, not 8.
- Roast level: Per bean, roast has little effect; measured by scoop, light roasts can be slightly higher because they’re denser.
This calculator is for general information and is not medical advice. If you have heart conditions, anxiety, are pregnant or take medications, ask your doctor what’s right for you.
Frequently asked questions
How much caffeine is too much?
The U.S. FDA cites 400 mg per day — about four or five 8 oz cups of brewed coffee — as an amount not generally associated with dangerous, negative effects for healthy adults. Sensitivity varies widely between people.
How much caffeine is in a cup of coffee?
An 8 fl oz cup of brewed coffee typically contains around 95 mg of caffeine, but it can range from roughly 70 to 140 mg depending on the beans, ratio and brew method.
Does espresso have more caffeine than coffee?
Per ounce, yes — a 1 oz shot has about 63 mg. But a full cup of brewed coffee usually contains more total caffeine than a single shot of espresso.
How much caffeine is safe during pregnancy?
The American College of Obstetricians and Gynecologists (ACOG) advises keeping caffeine under 200 mg per day during pregnancy. Check with your healthcare provider.
Does decaf have caffeine?
A little. Decaf coffee typically contains around 2–15 mg per 8 oz cup, compared with about 95 mg in regular brewed coffee.
Related guides
Light vs Dark Roast Coffee: What's the Difference?
Light vs dark roast compared: flavor, acidity, body and the caffeine myth, plus how to adjust grind, water temperature and ratio for each roast level.
Updated September 26, 2026
Arabica vs Robusta Coffee: What's the Difference?
Arabica vs robusta explained: how the plants differ, caffeine and sugar content, flavor, crema, price and blends, plus a quick look at liberica and excelsa.
Updated August 21, 2026
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