UK · Coffee & café
How much caffeine is in Costa Signature Blend espresso?
Costa’s current UK guide publishes caffeine values for one to four Signature Blend espresso shots and notes that natural and preparation variation remains.
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Caffeine by serving
| Serving | Caffeine | Basis |
|---|---|---|
| 1 shot | 100 mg | Manufacturer listed |
| 2 shots | 200 mg | Manufacturer listed |
| 3 shots | 325 mg | Manufacturer listed |
| 4 shots | 400 mg | Manufacturer listed |
Source and provenance
- Source type
- Manufacturer
- Market
- UK
- Value basis
- Manufacturer listed
- Source reviewed
- 23 August 2026
- Source version/date
- 30 April 2026
Guide applies 30 April–26 August 2026.
Estimated caffeine remaining over time
These figures apply CaffCalc’s exponential model to the adjusted 100 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 | 100 mg | 100 mg | 100 mg |
| 3 | 50 mg | 66.0 mg | 74.3 mg |
| 5 | 31.5 mg | 50 mg | 61.0 mg |
| 8 | 15.7 mg | 33.0 mg | 45.3 mg |
| 10 | 9.9 mg | 25 mg | 37.1 mg |
| 12 | 6.3 mg | 18.9 mg | 30.5 mg |
With the central five-hour model, the estimate falls below 25 mg after approximately 10.0 hours. The faster and slower columns show why one fixed clearance time should not be treated as a personal fact.
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