Dunkin iced latte (medium) carries more total caffeine per serving (166mg per 24 oz medium vs 145mg per 16 oz medium), but ounce for ounce McDonald's brewed coffee is actually the stronger drink at about 9mg per fluid ounce against 7. Which one "has more caffeine" depends on whether you measure the container or the concentration.
Dunkin iced latte (medium) vs McDonald's brewed coffee: the numbers
| Dunkin iced latte (medium) | McDonald's brewed coffee | |
|---|---|---|
| Caffeine per serving | 166mg per 24 oz medium | 145mg per 16 oz medium |
| Caffeine per fl oz | 6.9mg | 9.1mg |
| Servings to reach 400mg (FDA context) | 2.4 | 2.8 |
Sources: Dunkin iced latte (medium)'s figure is verified in our Dunkin iced latte (medium) caffeine guide against Caffeine Informer (source); McDonald's brewed coffee's figure is verified in our McDonald's brewed coffee guide against Caffeine Informer (source).
Which one should you pick?
Pick McDonald's brewed coffee when you want the lighter dose or a slower ramp, and Dunkin iced latte (medium) when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.
Related reading
- Dunkin iced latte (medium): the full caffeine guide
- McDonald's brewed coffee: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
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Gear from this guide
FAQ
Does Dunkin iced latte (medium) or McDonald's brewed coffee have more caffeine? Dunkin iced latte (medium): 166mg per 24 oz medium versus 145mg per 16 oz medium for McDonald's brewed coffee.
Which is stronger per ounce? McDonald's brewed coffee, at about 9.1mg per fluid ounce versus 6.9mg for Dunkin iced latte (medium).
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