McDonald's McCafe Coffee contains 109 mg of caffeine per Small 12 oz (355 ml / 12 oz). That is about the same caffeine as a typical 8 oz cup of brewed coffee (about 95 mg). Concentration: 30.7 mg per 100 ml.
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McDonald's McCafe Coffee Caffeine Content by Serving
Figures are for McCafe Premium Roast Brewed Coffee (McDonald's).
| Serving | Volume | Caffeine | Per 100 ml | Level |
|---|---|---|---|---|
| Small 12 oz | 355 ml / 12 oz | 109 mg | 30.7 mg | Moderate |
| Medium 16 oz | 473 ml / 16 oz | 145 mg | 30.7 mg | Moderate |
| Large 21 oz | 621 ml / 21 oz | 180 mg | 29 mg | High |
Source: caffeine figures from Caffeine Informer (figures obtained from McDonald's customer service, USDA-based estimates), accessed 2026-06-11. Values can vary by batch, location, and preparation; check the label or the source for the latest figures.
How McDonald's McCafe Coffee Compares to Coffee
At 109 mg per Small 12 oz, McDonald's McCafe Coffee delivers about the same caffeine as 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 McDonald's McCafe Coffee Before Bed
With caffeine's median 5-hour half-life, a Small 12 oz of McDonald's McCafe Coffee (109 mg) needs about 5 h 38 min to fall under 50 mg, the level where most people can fall asleep normally. That puts the last call at 4:15 PM (16:15) for a 10 PM bedtime and 5:15 PM (17:15) for an 11 PM bedtime. Individual half-lives range from roughly 2 to 12 hours, so treat these as a starting point.
The McDonald's McCafe Coffee sleep cutoff page has last-call times for four bedtimes, and the caffeine half-life calculator personalizes the curve to your metabolism.
