Espresso vs Green tea: which has more caffeine?
A cup of espresso has on average about 3.1× more caffeine than green tea.
Per 100 ml: espresso has about 24.9× more caffeine than green tea.
| Espresso | Green tea | |
|---|---|---|
| Caffeine per cup | 40–63 mg | 11–29 mg |
| Volume | 30 ml | 237 ml |
| mg / 100 ml (average) | 210 | 8.4 |
| Cups to reach 400 mg a day (adult) | 6 | 20 |
Frequently asked questions
Which has more caffeine: Espresso or Green tea?
A cup of espresso has on average about 3.1× more caffeine than green tea.
How many cups of green tea equal one cup of espresso?
Using average values, one cup of espresso (63 mg) equals about 3.1 cups of green tea (20 mg). This is a guide, since both drinks vary by batch and preparation.
Which is better in the evening?
Green tea has less caffeine per cup (about 20 mg versus about 63 mg for espresso). After 6 hours roughly half to a third of what you drank remains, but sensitivity varies a lot.
Try it
Sources and method
- Mayo Clinic: Caffeine content for coffee, tea, soda and more
- EUFIC: EFSA opinion on the safety of caffeine (2015)
- Ayakdaş & Ağagündüz, Foods 2025;14(13):2313 (68 tea samples)
Data checked 2026-10-24. Ranges are shown because studies report different numbers. General information, not medical advice.