Cold brew vs Nitro cold brew: caffeine compared
Nitro cold brew (16 oz) has 280 mg of caffeine, 75 mg more than Cold brew (16 oz, 205 mg) — 1.4× as much per serving. Per fluid ounce, Nitro cold brew is the stronger drink: 17.5 mg/oz versus 12.8 mg/oz.
| Cold brew | Nitro cold brew | |
|---|---|---|
| Serving | 16 oz | 16 oz |
| Caffeine per serving | 205 mg | 280 mg |
| Per fl oz | 12.8 mg | 17.5 mg |
| Share of 400 mg/day | 51% | 70% |
| Servings to reach 400 mg | 2.0 | 1.4 |
| Hours until under 50 mg | 10.2 h | 12.4 h |
| Last one for an 11 PM bedtime · standard (50 mg) | 12:49 PM | 10:34 AM |
| Last one for an 11 PM bedtime · sensitive (25 mg) | 7:49 AM | 5:34 AM |
| Share of the 200 mg pregnancy limit | 102% | 140% |
One serving of each, over 16 hours
Common questions
Which has more caffeine, Cold brew or Nitro cold brew?
Nitro cold brew (16 oz) has about 280 mg versus 205 mg in Cold brew (16 oz): 75 mg more, or 1.4× as much.
Which is stronger per ounce, Cold brew or Nitro cold brew?
Nitro cold brew: about 17.5 mg per fl oz versus 12.8 mg for Cold brew. Serving size decides the total you actually drink.
How many Cold brew servings equal one Nitro cold brew?
About 1.4 servings of Cold brew (16 oz) match the caffeine in one Nitro cold brew (16 oz).
When should I stop drinking Cold brew or Nitro cold brew before bed?
For an 11 PM bedtime with a 50 mg limit and a 5-hour half-life: last Cold brew by 12:49 PM, last Nitro cold brew by 10:34 AM. 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.
Source — Cold brew: CSPI caffeine chart (Starbucks Cold Brew, 16 oz grande), checked 2026-10-13. Typical value from Starbucks' grande cold brew.
Source — Nitro cold brew: Starbucks — Nitro Cold Brew nutrition (Grande), checked 2026-10-13.