Starbucks Cold Brew contains 155 mg of caffeine per Tall 12 oz (355 ml / 12 oz). That is about 1.6 times the caffeine of a typical 8 oz cup of brewed coffee (about 95 mg). Concentration: 43.3 mg per 100 ml.
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Starbucks Cold Brew Caffeine Content by Serving
Figures are for Cold Brew Coffee (Starbucks).
| Serving | Volume | Caffeine | Per 100 ml | Level |
|---|---|---|---|---|
| Tall 12 oz | 355 ml / 12 oz | 155 mg | 43.7 mg | High |
| Grande 16 oz | 473 ml / 16 oz | 205 mg | 43.3 mg | High |
| Venti 24 oz iced | 710 ml / 24 oz | 310 mg | 43.7 mg | Very High |
| Trenta 30 oz | 887 ml / 30 oz | 360 mg | 40.6 mg | Very High |
Source: caffeine figures from Caffeine Informer (values sourced from starbucks.com), accessed 2026-06-11. Values can vary by batch, location, and preparation; check the label or the source for the latest figures.
How Starbucks Cold Brew Compares to Coffee
At 155 mg per Tall 12 oz, Starbucks Cold Brew delivers about 1.6 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 Starbucks Cold Brew Before Bed
With caffeine's median 5-hour half-life, a Tall 12 oz of Starbucks Cold Brew (155 mg) needs about 8 h 10 min to fall under 50 mg, the level where most people can fall asleep normally. That puts the last call at 1:45 PM (13:45) for a 10 PM bedtime and 2:45 PM (14:45) for an 11 PM bedtime. Individual half-lives range from roughly 2 to 12 hours, so treat these as a starting point.
The Starbucks Cold Brew sleep cutoff page has last-call times for four bedtimes, and the caffeine half-life calculator personalizes the curve to your metabolism.
