Dunkin’ Caffeine Guide (2026): How Much Caffeine Is in Every Drink
If you’ve ever wondered about Dunkin caffeine levels before ordering, you’re not alone — a large Dunkin’ iced coffee can carry nearly as much caffeine as two energy drinks, while a Refresher has about a third of that. My cousin learned this the fun way: her 6 p.m. large cold brew kept her wide awake till 2 a.m., and she had no idea a single cup held over 300 milligrams. This guide lays out exactly how much caffeine is in every Dunkin’ drink, size by size, so you always know what you’re sipping.
Quick Answer: How Much Caffeine Is in Dunkin’ Coffee?
A medium (14 oz) Dunkin’ hot coffee has about 210 mg of caffeine, a medium (24 oz) iced coffee has about 267 mg, and a medium cold brew has about 260 mg. The strongest standard menu item is the large Americano at roughly 371 mg — close to the FDA’s 400 mg daily limit in a single cup. At the other end, decaf coffee has under 15 mg, and a small Refresher has about 66 mg. Dunkin’ doesn’t publish official per-drink caffeine figures, so the numbers below are widely reported averages — treat them as close estimates, not lab measurements.
Dunkin’ Caffeine by Drink: The Full Table (2026)
Here’s every major Dunkin’ drink with its approximate caffeine content by size. Values marked with ≈ are reported estimates.
Drink | Small | Medium | Large |
|---|---|---|---|
Hot Coffee | 150 mg | 210 mg | 300 mg |
Iced Coffee | 198 mg | 267 mg | 357 mg |
Cold Brew | 174 mg | 260 mg | 347 mg |
Americano | ≈237 mg | ≈249 mg | ≈371 mg |
Latte / Cappuccino | ≈118 mg | ≈166 mg | ≈252 mg |
Espresso (per shot) | ≈75 mg | ≈75 mg | ≈75 mg |
Frozen Coffee | ≈150 mg | ≈200 mg | ≈300 mg |
Refreshers | ≈66 mg | ≈99 mg | ≈132 mg |
Matcha Latte | ≈70 mg | ≈70 mg | ≈100 mg |
Chai Latte | ≈70 mg | ≈70 mg | ≈100 mg |
Iced Tea | ≈45 mg | ≈70 mg | ≈90 mg |
Dunkin’ Energy Drink | ≈92 mg | ≈114 mg | ≈180 mg |
Decaf Hot Coffee | <15 mg | <15 mg | <15 mg |
Note: Dunkin’ doesn’t publish official per-drink caffeine numbers. Figures above are widely reported averages compiled from caffeine databases and 2026 menu guides; values vary by location, brew strength, and preparation. Last verified October 2026.
Which Dunkin’ Drink Has the Most Caffeine?
The large Americano tops the menu at roughly 371 mg of caffeine — thanks to its extra espresso shots. Close behind: the extra-large hot coffee (≈359 mg), the large iced coffee (≈357 mg), and the large cold brew (≈347 mg). If you’re chasing the strongest legal kick in one cup, the Americano is your answer. For the full story on Dunkin’s boldest chilled option, see our iced coffee guide, which breaks down exactly why that large cup hits so hard.
Lowest-Caffeine Options at Dunkin’
Need to cut back without giving up the ritual? Your gentlest options:
- Decaf hot coffee — under 15 mg per cup, the same signature flavor without the jolt.
- Small Refresher — about 66 mg from green coffee extract; fruity, light, and easygoing. Here’s our full Refreshers guide with caffeine details.
- Iced tea / hot tea — roughly 45–90 mg depending on size, a mellow middle ground.
- Small latte — about 118 mg; the milk softens both the taste and the total.
How Much Caffeine Is Too Much?
The FDA cites 400 mg per day as the amount generally safe for healthy adults — that’s roughly two medium Dunkin’ iced coffees, or one large Americano plus a small hot coffee (MD Anderson’s caffeine guide breaks down the research behind that number). Go past it regularly and you may notice jitters, a racing heart, or ruined sleep (ask my cousin about that 2 a.m. stare at the ceiling). Pregnant women, teens, and anyone sensitive to stimulants should aim much lower — when in doubt, check with your doctor, not a menu board. For the calorie side of the same drinks, our Dunkin’ calorie guide has the full breakdown.
Dunkin’ vs Starbucks: Who Has More Caffeine?
Cup for cup, Starbucks brewed coffee packs more caffeine than Dunkin’s. A small Starbucks brewed coffee runs about 260 mg vs Dunkin’s 180 mg; medium is roughly 330 mg vs 210 mg; large about 410 mg vs 330 mg. So if you’re switching between the two chains, don’t assume your usual size delivers your usual kick — the same “medium” can differ by over 100 mg of Dunkin caffeine vs its Starbucks equivalent.
How to Get Less (or More) Caffeine in Your Order
- Want less? Order decaf, switch to a Refresher or iced tea, or simply size down — a small iced coffee has nearly 160 mg less than a large.
- Want more? Add an espresso shot (≈75 mg each) to any drink, or pick the Americano or cold brew over regular brewed coffee.
- Timing matters. Caffeine peaks in your blood about 45 minutes after drinking and lingers for hours — that 4 p.m. large cold brew is still working at midnight.
And if you’re watching the sugar that comes with the buzz, our coffee menu guide lists low-calorie ordering hacks for every drink.
Dunkin’ Caffeine FAQs
Quick answers to the most-searched Dunkin caffeine questions:
How much caffeine is in a medium Dunkin’ iced coffee?
About 267 mg in the 24 oz medium — more than two cans of Red Bull combined.
Does Dunkin’ cold brew have more caffeine than iced coffee?
Size for size, they’re close: a medium cold brew has about 260 mg vs 267 mg in iced coffee. The large iced coffee actually edges out the large cold brew (357 mg vs 347 mg).
Do Dunkin’ Refreshers have caffeine?
Yes — from green coffee extract. About 66 mg (small), 99 mg (medium), 132 mg (large).
Is Dunkin’ decaf completely caffeine-free?
No. Decaf still contains a small amount — under 15 mg per cup. If you’re highly sensitive, keep that in mind.
What is the strongest drink at Dunkin’?
The large Americano, at roughly 371 mg of caffeine — nearly the entire FDA daily guideline in one cup.
Does adding milk reduce caffeine?
No — milk dilutes the flavor and the per-sip strength, but the total milligrams in your cup stay the same.
The Bottom Line
Dunkin’ caffeine ranges from under 15 mg (decaf) to about 371 mg (large Americano) — a huge spread hiding inside one menu. Now you can order with your eyes open: pick the Americano or XL hot coffee when you need maximum fuel, or a Refresher or decaf when you want the ritual without the rocket. DunkinMenuPrice.com is an independent site and is not affiliated with Dunkin’.
