UK · Coffee & café
How much caffeine is in Pret Americano?
Not published in the brand’s public UK menu. This figure is reported by Which? and should be treated as approximate.
Which? reported 180 mg for a 355 ml Pret Americano in its August 2026 UK comparison.
A practical next step
Looking for a lower-caffeine alternative?
No numeric swap is selected for this serving. Other lower-caffeine records may exist in the catalogue. Ask about the current decaf recipe or an explicitly caffeine-free drink; an unverified decaf amount isn’t recorded as zero.
Pret figures here are reported rather than current first-party measurements. We don’t invent a decaf figure. Inspect the Pret comparison and its evidence limits.
Browse manufacturer-identified caffeine-free UK fizzy drinks or choose another documented swap.
Interactive serving
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Where this figure comes from
- Source type
- Independent publisher
- Market
- UK
- How we got the amount
- Reported by independent comparison
- Source reviewed
- 4 September 2026
- Source version/date
- 25 August 2026
Which? says it asked five chains for caffeine information and used online guides; many figures were obtained through brand press offices. The brand’s public UK menu doesn’t publish this value, so treat it as a reported figure rather than a first-party public listing.
Estimated caffeine remaining over time
These figures apply CaffCalc’s exponential model to the adjusted 180 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 | 180 mg | 180 mg | 180 mg |
| 3 | 90 mg | 118.8 mg | 133.7 mg |
| 5 | 56.7 mg | 90 mg | 109.7 mg |
| 8 | 28.3 mg | 59.4 mg | 81.5 mg |
| 10 | 17.9 mg | 45 mg | 66.9 mg |
| 12 | 11.3 mg | 34.1 mg | 54.9 mg |
With the central five-hour model, the estimate falls below 25 mg after approximately 14.2 hours. The faster and slower columns show why one fixed clearance time shouldn’t be treated as a personal fact.
Use this caffeine value
Use this amount in a calculation, or save the drink to your tracker on this device.