Guarana contains 47 mg of caffeine per 1 g ground seed. That is about 49% of the caffeine in a typical 8 oz cup of brewed coffee (about 95 mg).
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Guarana Caffeine Content by Serving
Figures are for Guarana (seed) (Generic (Paullinia cupana)).
| Serving | Volume | Caffeine | Per 100 ml | Level |
|---|---|---|---|---|
| 1 g ground seed | - | 47 mg | - | Low |
Source: caffeine figures from Caffeine Informer, accessed 2026-06-11. Values can vary by batch, location, and preparation; check the label or the source for the latest figures.
How Guarana Compares to Coffee
At 47 mg per 1 g ground seed, Guarana delivers about 49% of the caffeine in a typical 8 oz cup of brewed coffee (about 95 mg). For a wider comparison across drinks, try the caffeine comparison tool or browse the full caffeine database.
When to Stop Taking Guarana Before Bed
One g ground seed of Guarana (47 mg) stays under the 50 mg sleep-ready threshold from the first sip, so a normal serving is unlikely to delay sleep on its own. Multiple servings stack, though: caffeine's median half-life is about 5 hours, so a second or third serving in the afternoon can still add up past 50 mg by bedtime.
The Guarana sleep cutoff page has last-call times for four bedtimes, and the caffeine half-life calculator personalizes the curve to your metabolism.
