Research snapshot · Dataset version 4 September 2026
UK Caffeine Index 2026
A reproducible snapshot of the UK servings CaffCalc can currently support with first-party data. It is deliberately an index of documented records—not a claim to cover every drink sold in the UK.
What the current release shows
Costa Signature Blend Americano, Large. This is the highest value in the current CaffCalc UK index, not necessarily the whole UK market.
Servings transcribed directly from the linked first-party source rather than calculated from separate source tables.
Servings calculated only where a manufacturer publishes enough information—such as both shot count and caffeine by shot—to reproduce the arithmetic.
Highest-caffeine servings in the current index
| Rank | Drink | Serving | Caffeine | Basis |
|---|---|---|---|---|
| 1 | Costa Signature Blend Americano Costa Coffee | Large | 400 mg | Calculated from manufacturer table |
| 2 | Costa Signature Blend Cappuccino Costa Coffee | Large | 400 mg | Calculated from manufacturer table |
| 3 | Costa Signature Blend espresso Costa Coffee | 4 shots | 400 mg | Manufacturer listed |
| 4 | Costa Signature Blend Mocha Costa Coffee | Large | 400 mg | Calculated from manufacturer table |
| 5 | Costa Signature Blend Americano Costa Coffee | Medium | 325 mg | Calculated from manufacturer table |
| 6 | Costa Signature Blend Cappuccino Costa Coffee | Medium | 325 mg | Calculated from manufacturer table |
| 7 | Costa Signature Blend espresso Costa Coffee | 3 shots | 325 mg | Manufacturer listed |
| 8 | Costa Signature Blend Latte Costa Coffee | Large | 325 mg | Calculated from manufacturer table |
| 9 | Costa Signature Blend Mocha Costa Coffee | Medium | 325 mg | Calculated from manufacturer table |
| 10 | Starbucks UK Freshly Brewed Coffee Starbucks | Venti | 324.2 mg | Manufacturer listed |
Scope, reproducibility and limitations
- Only verified records explicitly labelled as UK are included in this snapshot and chart.
- Secondary-reported, indicative and older approximate records remain in the downloadable database but are excluded from these headline rankings.
- Each record retains its source URL, serving, market, value basis, evidence quality and review date.
- A calculated value is included only when the linked manufacturer tables make the arithmetic reproducible.
- Natural coffee variation, customisations and formulation changes can make the product in hand differ from a published value.
Read the editorial and sourcing policy or inspect the caffeine calculation method. Corrections are recorded against the relevant source-backed drink record.
How to cite or reuse this release
Suggested citation: Dickman, Benjamin. “CaffCalc UK Caffeine Index 2026.” Dataset version 4 September 2026. CaffCalc. https://caffcalc.app/uk-caffeine-database
Reuse must preserve the source and scope fields. CaffCalc’s permission does not relicense manufacturer documents, trademarks or third-party material. Read the data licence and attribution terms before republishing.