General reference · Coffee & café
How much caffeine is in Brewed coffee?
A useful general estimate for an ordinary cup of brewed coffee. Bean, roast and preparation can change the dose substantially.
Interactive serving
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Source and provenance
- Source
- USDA FoodData Central
- Source type
- Government database
- Market
- General reference
- Value basis
- Authoritative reference
- Source reviewed
- 21 August 2026
Representative reference value; not a promise for every bean or brewing method.
Estimated caffeine remaining over time
These figures apply CaffCalc’s exponential model to the adjusted 95 mg starting value. They are calculations, not measurements of caffeine in a particular person.
| Hours elapsed | 3-hour half-life | 5-hour half-life | 7-hour half-life |
|---|---|---|---|
| 0 | 95 mg | 95 mg | 95 mg |
| 3 | 47.5 mg | 62.7 mg | 70.6 mg |
| 5 | 29.9 mg | 47.5 mg | 57.9 mg |
| 8 | 15.0 mg | 31.3 mg | 43.0 mg |
| 10 | 9.4 mg | 23.8 mg | 35.3 mg |
| 12 | 5.9 mg | 18.0 mg | 29.0 mg |
With the central five-hour model, the estimate falls below 25 mg after approximately 9.6 hours. The faster and slower columns show why one fixed clearance time should not be treated as a personal fact.
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