Tim Hortons brewed coffee vs Dunkin iced coffee (medium): which has more caffeine?

Dunkin iced coffee (medium) has more caffeine than Tim Hortons brewed coffee on both counts: 297mg per 24 oz medium against 140mg per 14 oz medium, and about 12mg per fluid ounce against 10. The serving sizes differ, so the table below shows both ways of counting.

Tim Hortons brewed coffee vs Dunkin iced coffee (medium): the numbers

Sources: Tim Hortons brewed coffee's figure is verified in our Tim Hortons brewed coffee caffeine guide against Caffeine Informer (source); Dunkin iced coffee (medium)'s figure is verified in our Dunkin iced coffee (medium) guide against Caffeine Informer Dunkin guide (source).

Which one should you pick?

Pick Tim Hortons brewed coffee when you want the lighter dose or a slower ramp, and Dunkin iced coffee (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

• Tim Hortons brewed coffee: the full caffeine guide
• Dunkin iced coffee (medium): the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Does Tim Hortons brewed coffee or Dunkin iced coffee (medium) have more caffeine? Dunkin iced coffee (medium): 297mg per 24 oz medium versus 140mg per 14 oz medium for Tim Hortons brewed coffee.

Which is stronger per ounce? Dunkin iced coffee (medium), at about 12.4mg per fluid ounce versus 10.0mg for Tim Hortons brewed coffee.