Costa Coffee Caffeine Calculator
Every figure here comes directly from Costa's own official UK caffeine guide, not a compiled estimate. Costa is unusually transparent — it publishes exact milligrams per shot count — which also means it's the rare chain where you can see an actual quirk in the published numbers rather than a marketing gap.
How much caffeine is in Costa coffee? A single espresso shot with Costa's Signature Blend is 100 mg, and two shots is 200 mg — both exactly linear. But three shots jumps to 325 mg, not the 300 mg the pattern predicts, before four shots returns to a clean 400 mg. That means a small Costa latte (1 shot, 100 mg) and a medium (2 shots, 200 mg) scale as expected — but a large latte or a medium cappuccino (3 shots) is disproportionately strong at 325 mg.
Costa's own data has a kink at 3 shots
This isn't a rumor or a myth — it's printed in Costa's own official guide. 1, 2, and 4 shots scale perfectly at 100 mg per shot. 3 shots should be 300 mg by that pattern, but Costa's guide states 325 mg instead — 25 mg more than the linear expectation. Nobody outside Costa has explained why; it may reflect a genuinely different extraction ratio at that specific shot count. Either way, it's the real, current, published figure, and it's the one used throughout this calculator.
Calculate your drink
Official Costa UK datacaffeine in a small Latte (1 espresso shot)
Figures are transcribed directly from Costa's "Information on Caffeine" table in its official UK Store Allergen and Nutrition Guide, and reflect Costa's Signature Blend. Iced versions are assumed to follow the same shot count as their hot equivalents, since Costa's caffeine table does not list iced drinks separately.
Where the linear pattern breaks
Plotted shot by shot, three of the four points sit exactly where 100 mg-per-shot predicts. The third doesn't.
What this means for your order
If you're comparing a small (1 shot, 100 mg) to a medium (2 shots, 200 mg), the jump is exactly what you'd expect — double the shots, double the caffeine. But stepping up from a medium latte to a large (3 shots), or ordering a medium cappuccino, mocha or Americano (also 3 shots), adds 125 mg rather than the 100 mg the first two sizes would suggest. It's a bigger single-size jump than anywhere else on the menu.
Complete Costa caffeine chart
Espresso-based drinks by size
| Drink | Small | Medium | Large |
|---|---|---|---|
| Latte | 1 shot — 100 mg | 2 shots — 200 mg | 3 shots — 325 mg |
| Cappuccino | 2 shots — 200 mg | 3 shots — 325 mg | 4 shots — 400 mg |
| Mocha | 2 shots — 200 mg | 3 shots — 325 mg | 4 shots — 400 mg |
| Americano | 2 shots — 200 mg | 3 shots — 325 mg | 4 shots — 400 mg |
Latte is the outlier recipe — it uses one fewer shot than Cappuccino, Mocha and Americano at every size. A small latte (100 mg) is notably milder than a small cappuccino (200 mg) despite being the same size cup.
Flat White, Flat Black, Cortado — different extraction methods
| Drink | Method | Caffeine |
|---|---|---|
| Flat White (Small only) | 3 Cortissimo shots | 241 mg |
| Flat Black (Small only) | 3 Cortissimo shots | 241 mg |
| Cortado | 2 Corto shots | 141 mg |
Flat White and Flat Black use Cortissimo, a different extraction method entirely, which is why 3 Cortissimo shots (241 mg) come out lower than 3 regular espresso shots (325 mg) despite the same shot count. Cortado uses its own Corto pull for the same reason. Both drinks are Small-only on Costa's current menu — there's no Medium or Large Flat White.
Espresso, Ristretto, Decaf
| Drink | Caffeine |
|---|---|
| Espresso, 1 shot | 100 mg |
| Espresso, 2 shots | 200 mg |
| Espresso, 3 shots | 325 mg |
| Espresso, 4 shots | 400 mg |
| Ristretto, 1 shot | 90 mg |
| Ristretto, 2 shots | 180 mg |
| Decaffeinated Espresso, 2 shots (1 pod) | 2 mg |
Ristretto scales perfectly linearly at 90 mg per shot with no equivalent kink — the irregularity is specific to the standard espresso/shot-count table, not a general rule about Costa's drinks. Decaf is genuinely close to caffeine-free at 2 mg for a full 2-shot pod.
What surprises people about Costa's caffeine
- A small latte is much milder than a small cappuccino — 100 mg against 200 mg — because Costa's latte recipe uses one fewer shot at every size.
- The medium-to-large jump for lattes, and small-to-medium for cappuccino/mocha/Americano, adds 125 mg, not the 100 mg the rest of the menu implies — the 3-shot kink.
- Flat White and Flat Black are Small-only on the current UK menu, despite being built on three shots — there's no bigger size to order.
- A large Costa espresso-based drink (325–400 mg) can exceed a Starbucks Grande Pike Place (310 mg) — Costa's largest drinks are genuinely among the strongest at any major UK or US chain.
- Decaf is about as close to zero as coffee gets — 2 mg for a full two-shot decaf pod, negligible for virtually anyone.
Costa vs other chains
| Drink | Caffeine |
|---|---|
| Costa large Cappuccino/Mocha/Americano (4 shots) | 400 mg |
| Costa large Latte / medium Cappuccino-Mocha-Americano (3 shots) | 325 mg |
| Starbucks Grande Pike Place, brewed | 310 mg |
| Costa Flat White / Flat Black (Small) | 241 mg |
| Costa medium Latte / small Cappuccino-Mocha-Americano (2 shots) | 200 mg |
| Starbucks Caffè Latte (Grande) | 150 mg |
| Costa Cortado | 141 mg |
| Drip coffee, 12 oz | ~145 mg |
| Costa small Latte (1 shot) | 100 mg |
| Dutch Bros latte (medium) | 95 mg |
At the top of its menu, Costa is genuinely one of the strongest mainstream coffee chains anywhere — a large cappuccino at 400 mg is the FDA's entire daily reference amount in one cup. At the bottom, a small latte at 100 mg is unremarkable. The gap between Costa's mildest and strongest ordinary drinks is wider than at most competitors.
How many Costa drinks a day is safe?
The U.S. FDA and UK guidance both commonly cite 400 mg a day as an amount not generally associated with negative effects in healthy adults.
| Drink | Share of 400 mg guideline |
|---|---|
| Small Latte (100 mg) | 25% |
| Medium Latte / Small Cappuccino (200 mg) | 50% |
| Flat White (241 mg) | 60% |
| Large Latte / Medium Cappuccino (325 mg) | 81% |
| Large Cappuccino/Mocha/Americano (400 mg) | 100% |
A single large Cappuccino, Mocha or Americano uses the entire daily guideline on its own — there's no room left for anything else caffeinated that day if you want to stay under it. Lower ceilings are commonly cited for some groups: around 200 mg a day in pregnancy, which a medium Costa latte already reaches, and roughly 100 mg for adolescents, matched almost exactly by a small latte. Sensitivity varies a great deal between individuals. Talk to a doctor or pharmacist if you're pregnant, have a heart condition or anxiety disorder, or take medication that interacts with stimulants.
Costa Coffee caffeine: frequently asked questions
How much caffeine is in a Costa coffee?
It depends heavily on the drink and size. A single espresso shot is 100 mg per Costa's official guide, scaling to 200 mg for two shots, 325 mg for three, and 400 mg for four.
Why does 3 shots jump to 325 mg instead of 300 mg?
Costa's own published data shows this exact jump — 1, 2 and 4 shots scale perfectly at 100 mg each, but 3 shots is listed at 325 mg. The reason isn't explained in the guide itself; it may reflect a genuinely different extraction ratio at that specific shot count, but it is the real, current, officially published figure.
How much caffeine is in a Costa latte?
100 mg for a small (1 shot), 200 mg for a medium (2 shots), and 325 mg for a large (3 shots). Costa's latte recipe uses one fewer shot than its cappuccino, mocha or Americano at every size.
How much caffeine is in a Costa Flat White?
241 mg, made with 3 Cortissimo shots — a different extraction method from standard espresso. Flat White is only available in one size (Small) on Costa's current UK menu.
Which Costa drink has the most caffeine?
A large Cappuccino, Mocha or Americano, all built on 4 shots for 400 mg — the FDA's entire daily reference amount in one cup.
Is Costa coffee stronger than Starbucks?
At the top end, yes. A large Costa Cappuccino, Mocha or Americano (400 mg) exceeds a Starbucks Grande Pike Place brewed coffee (310 mg). At the small end, a Costa small latte (100 mg) is milder than a Starbucks Grande latte (150 mg).
How much caffeine is in Costa decaf?
2 mg for a full two-shot decaf pod, according to Costa's official guide — close enough to zero for virtually anyone.
How much caffeine is in a Costa Cortado?
141 mg, made with 2 Corto shots, a different pull from Costa's standard espresso.
Does Costa publish official caffeine figures?
Yes, directly. Costa's UK Store Allergen and Nutrition Guide includes a dedicated "Information on Caffeine" section stating exact milligram figures by shot count for its Signature Blend, and Costa updates this guide periodically.
Sources and method
All caffeine figures on this page are transcribed directly from Costa Coffee's official UK Store Allergen and Nutrition Guide, "Information on Caffeine" section, sourced from costa.co.uk. Costa states this data reflects its Signature Blend and that caffeine naturally varies with bean origin, growing conditions, grind size, water temperature and extraction time. Shot counts by drink and size are taken from the same guide's shot-count table. Iced drink variants are assumed to follow the same shot count as their hot equivalents, since Costa's caffeine table lists only hot coffee categories; this assumption is flagged rather than presented as confirmed.
- Costa Coffee — UK Store Allergen and Nutrition Guide, "Information on Caffeine" section (costa.co.uk)
- U.S. Food and Drug Administration — Spilling the Beans: How Much Caffeine Is Too Much?
- American College of Obstetricians and Gynecologists — guidance on moderate caffeine consumption in pregnancy
This page is an independent reference and is not affiliated with, endorsed by or sponsored by Costa Coffee or The Coca-Cola Company. Costa, Costa Coffee and drink names are trademarks of their respective owner. Costa updates its nutrition guide periodically — figures may change in later editions, and Costa itself notes caffeine content varies with natural product variation. Nothing here is medical advice.