How Much Caffeine Is in Coffee and Tea
A 150 mL cup of drip coffee has about 90 mg of caffeine, so 2 cups = 180 mg. EFSA cites under 400 mg/day for adults and under 200 mg per single dose (general information).
Open the interactive Everyday Lifestyle tool →Key facts
| Drip coffee 150 mL | 90 mg |
|---|---|
| Espresso 30 mL (1 shot) | 60 mg |
| Black tea / green tea 150 mL | 30 mg / 20 mg |
| EFSA daily / single dose | < 400 mg / < 200 mg |
| Adult half-life | 4-6 h |
Frequently asked questions
How much caffeine is in two cups of coffee?
About 180 mg: a 150 mL drip coffee is roughly 90 mg, so two cups total 180 mg.
How much caffeine is too much in a day?
EFSA cites under 400 mg/day for healthy adults, and under 200 mg in a single dose (general information).
Does green tea have caffeine?
Yes, about 20 mg per 150 mL of sencha; gyokuro is much higher at around 180 mg per 150 mL.
Related pages
The calculations on this page are estimates based on common general-purpose formulas. They are not medical advice -- consult a doctor or other qualified professional for decisions about your health.
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