Source-backed comparison
Costa Latte vs Cappuccino vs Flat White: Caffeine
Compare calculated caffeine for Costa UK Medium Signature Blend Latte and Cappuccino servings using Costa’s published recipe and caffeine tables.
Dated Costa reference: the recorded guide covers 30 April–26 August 2026. A newer recipe has not been verified; confirm the current menu before relying on an exact amount.
| Measure | Costa Signature Blend Latte | Costa Signature Blend Cappuccino |
|---|---|---|
| Named serving | Medium | Medium |
| Market | UK | UK |
| Caffeine per serving | 200 mg | 325 mg |
| Caffeine per 100 ml | Not available from source | Not available from source |
| Value basis | Calculated from manufacturer table | Calculated from manufacturer table |
| Estimated after 5 hours | 100 mg | 162.5 mg |
| Absolute difference | 125 mg | 125 mg |
| Difference vs lower serving | 62.5% | 62.5% |
How to interpret the comparison
- Costa’s published recipe table assigns two Signature Blend shots to the Medium Latte and three to the Medium Cappuccino.
- Combining that recipe table with Costa’s caffeine-by-shot figures gives 200 mg for the Latte and 325 mg for the Cappuccino.
- These are transparently calculated values rather than direct laboratory measurements, and Costa notes that natural and preparation variation occurs.
Guide updated 2026-09-24
Add flat white to the Costa comparison
The short answer
Drink size alone does not identify caffeine. The recorded Costa recipes use different shot counts and extraction types: the flat white uses Cortissimo, not a generic espresso multiplier.
Dated Costa reference: the recorded guide covers 30 April–26 August 2026. A newer recipe has not been verified; confirm the current menu before relying on an exact amount.
Inspect the documented servings
These values come from the linked catalogue records. A source-backed record is not a measurement of your drink or a guarantee of a current recipe.
| Drink / market | Serving | Caffeine | Per 100 ml | Evidence / action |
|---|---|---|---|---|
| Costa Signature Blend LatteUK | Small, drink in | 100 mg | Not documented | Calculated from manufacturer tableVerified source record · Reviewed 2026-08-23Use this dose · Compare |
| Costa Signature Blend LatteUK | Small, takeaway | 200 mg | Not documented | Calculated from manufacturer tableVerified source record · Reviewed 2026-08-23Use this dose · Compare |
| Costa Signature Blend LatteUK | Medium | 200 mg | Not documented | Calculated from manufacturer tableVerified source record · Reviewed 2026-08-23Use this dose · Compare |
| Costa Signature Blend LatteUK | Large | 325 mg | Not documented | Calculated from manufacturer tableVerified source record · Reviewed 2026-08-23Use this dose · Compare |
| Costa Signature Blend CappuccinoUK | Small | 200 mg | Not documented | Calculated from manufacturer tableVerified source record · Reviewed 2026-08-23Use this dose · Compare |
| Costa Signature Blend CappuccinoUK | Medium | 325 mg | Not documented | Calculated from manufacturer tableVerified source record · Reviewed 2026-08-23Use this dose · Compare |
| Costa Signature Blend CappuccinoUK | Large | 400 mg | Not documented | Calculated from manufacturer tableVerified source record · Reviewed 2026-08-23Use this dose · Compare |
| Costa Signature Blend Flat WhiteUK | Small | 241 mg | Not documented | Manufacturer listedVerified source record · Reviewed 2026-08-23Use this dose · Compare |
Bars use the selected measure; numbers remain visible in both units. No bar is drawn for an undocumented concentration. Per 100 ml = serving caffeine × 100 ÷ documented volume.
Read the recipe as well as the size
The recorded Medium Latte uses two espresso shots and the Medium Cappuccino uses three. The flat white uses a separately documented extraction. The table preserves those published relationships instead of assigning every shot the same number.
Scope of this comparison
Costa values here retain the April–August 2026 source period. Drink-in and takeaway can differ even under the same size name. These are named standard recipes, not measurements of a customised order or a claim that medium sizes have equal volumes.
Sources and scope
- Costa Coffee UK store guideGuide applies 30 April–26 August 2026. Source reviewed 2026-08-23.
Educational information, not medical advice. Published, calculated and approximate values have different limits. Check the current product label or recipe when an exact amount matters.
Calculated five-hour timeline
This table applies the same exponential half-life equation to both starting amounts. It does not show measured blood levels or predict which drink will affect a particular person more.
| Hours after serving | Costa Signature Blend Latte | Costa Signature Blend Cappuccino |
|---|---|---|
| 0 | 200 mg | 325 mg |
| 3 | 132.0 mg | 214.4 mg |
| 5 | 100 mg | 162.5 mg |
| 8 | 66.0 mg | 107.2 mg |
| 10 | 50 mg | 81.3 mg |
| 12 | 37.9 mg | 61.6 mg |
Sources
- Costa Coffee UK store guideGuide applies 30 April–26 August 2026.
- Costa Coffee UK store guideGuide applies 30 April–26 August 2026.
Find lower-caffeine alternatives to Costa Signature Blend Latte or compare drinks against a bedtime target.