Bubble Tea contains 151 mg of caffeine per 16 oz cup (typical) (473 ml / 16 oz). That is about 1.6 times the caffeine of a typical 8 oz cup of brewed coffee (about 95 mg). Concentration: 32 mg per 100 ml.
Track your caffeine with Unbuzz, free on the App Store.
Bubble Tea Caffeine Content by Serving
Figures are for Bubble tea / boba milk tea (typical).
| Serving | Volume | Caffeine | Per 100 ml | Level |
|---|---|---|---|---|
| 16 oz cup (typical) | 473 ml / 16 oz | 151 mg | 31.9 mg | High |
Source: caffeine figures from Caffeine Informer (2013 Hong Kong government study), accessed 2026-06-11. Values can vary by batch, location, and preparation; check the label or the source for the latest figures.
How Bubble Tea Compares to Coffee
At 151 mg per 16 oz cup (typical), Bubble Tea 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 Bubble Tea Before Bed
With caffeine's median 5-hour half-life, a 16 oz cup (typical) of Bubble Tea (151 mg) needs about 7 h 59 min to fall under 50 mg, the level where most people can fall asleep normally. That puts the last call at 2:00 PM (14:00) for a 10 PM bedtime and 3:00 PM (15:00) for an 11 PM bedtime. Individual half-lives range from roughly 2 to 12 hours, so treat these as a starting point.
The Bubble Tea sleep cutoff page has last-call times for four bedtimes, and the caffeine half-life calculator personalizes the curve to your metabolism.
