Matcha vs Red Bull: caffeine compared
Red Bull (8.4 oz) has 80 mg of caffeine, 10 mg more than Matcha (1 tsp in 8 oz, 70 mg) — 1.1× as much per serving. Per fluid ounce, Red Bull is the stronger drink: 9.5 mg/oz versus 8.8 mg/oz.
| Matcha | Red Bull | |
|---|---|---|
| Serving | 1 tsp in 8 oz | 8.4 oz |
| Caffeine per serving | 70 mg | 80 mg |
| Per fl oz | 8.8 mg | 9.5 mg |
| Share of 400 mg/day | 18% | 20% |
| Servings to reach 400 mg | 5.7 | 5.0 |
| Hours until under 50 mg | 2.4 h | 3.4 h |
| Last one for an 11 PM bedtime · standard (50 mg) | 8:34 PM | 7:37 PM |
| Last one for an 11 PM bedtime · sensitive (25 mg) | 3:34 PM | 2:37 PM |
| Share of the 200 mg pregnancy limit | 35% | 40% |
One serving of each, over 16 hours
Common questions
Which has more caffeine, Matcha or Red Bull?
Red Bull (8.4 oz) has about 80 mg versus 70 mg in Matcha (1 tsp in 8 oz): 10 mg more, or 1.1× as much.
Which is stronger per ounce, Matcha or Red Bull?
Red Bull: about 9.5 mg per fl oz versus 8.8 mg for Matcha. Serving size decides the total you actually drink.
How many Matcha servings equal one Red Bull?
About 1.1 servings of Matcha (1 tsp in 8 oz) match the caffeine in one Red Bull (8.4 oz).
When should I stop drinking Matcha or Red Bull before bed?
For an 11 PM bedtime with a 50 mg limit and a 5-hour half-life: last Matcha by 8:34 PM, last Red Bull by 7:37 PM. Half-life varies from about 1.5 to 9.5 hours between people.
Method
Caffeine per labeled serving, from the same drink table every calculator here uses (FDA/USDA reference amounts and manufacturer labels; see caffeine content of every drink). Brewed drinks vary batch to batch, so read these as typical values. Decay uses a 5-hour average half-life with a 45-minute absorption ramp; cutoff = bedtime − 5 h × log₂(dose ÷ limit). Percentages use the FDA's 400 mg/day figure for healthy adults and the 200 mg/day limit ACOG gives for pregnancy.
Unverified — Matcha: Depends on powder and dose; no reliable reference value. Treat 70 mg as a rough estimate.
Source — Red Bull: Red Bull — caffeine per can, checked 2026-10-13.