Dunkin' Iced Coffee contains 198 mg of caffeine per Small 16 oz (473 ml / 16 oz). That is about 2.1 times the caffeine of a typical 8 oz cup of brewed coffee (about 95 mg). Concentration: 41.8 mg per 100 ml.
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Dunkin' Iced Coffee Caffeine Content by Serving
Figures are for Iced Coffee (Dunkin).
| Serving | Volume | Caffeine | Per 100 ml | Level |
|---|---|---|---|---|
| Small 16 oz | 473 ml / 16 oz | 198 mg | 41.9 mg | High |
| Medium 24 oz | 710 ml / 24 oz | 297 mg | 41.8 mg | High |
| Large 32 oz | 946 ml / 32 oz | 396 mg | 41.9 mg | Very High |
Source: caffeine figures from Caffeine Informer Dunkin guide (values sourced from dunkindonuts.com), accessed 2026-06-11. Values can vary by batch, location, and preparation; check the label or the source for the latest figures.
How Dunkin' Iced Coffee Compares to Coffee
At 198 mg per Small 16 oz, Dunkin' Iced Coffee delivers about 2.1 times the caffeine of a typical 8 oz cup of brewed coffee (about 95 mg). For a wider comparison across drinks, try the caffeine comparison tool or browse the full caffeine database.
When to Stop Drinking Dunkin' Iced Coffee Before Bed
With caffeine's median 5-hour half-life, a Small 16 oz of Dunkin' Iced Coffee (198 mg) needs about 9 h 56 min to fall under 50 mg, the level where most people can fall asleep normally. That puts the last call at 12:00 PM (12:00) for a 10 PM bedtime and 1:00 PM (13:00) for an 11 PM bedtime. Individual half-lives range from roughly 2 to 12 hours, so treat these as a starting point.
The Dunkin' Iced Coffee sleep cutoff page has last-call times for four bedtimes, and the caffeine half-life calculator personalizes the curve to your metabolism.
