Starbucks decaf, brewed vs Coffee, decaf: caffeine compared
Starbucks decaf, brewed (16 oz) has 25 mg of caffeine, 23 mg more than Coffee, decaf (8 oz, 2 mg) — 12.5× as much per serving. Per fluid ounce, Starbucks decaf, brewed is the stronger drink: 1.6 mg/oz versus 0.2 mg/oz.
| Starbucks decaf, brewed | Coffee, decaf | |
|---|---|---|
| Serving | 16 oz | 8 oz |
| Caffeine per serving | 25 mg | 2 mg |
| Per fl oz | 1.6 mg | 0.2 mg |
| Share of 400 mg/day | 6% | 0% |
| Servings to reach 400 mg | 16.0 | 200.0 |
| Hours until under 50 mg | already under | already under |
| Last one for an 11 PM bedtime · standard (50 mg) | 11:00 PM | 11:00 PM |
| Last one for an 11 PM bedtime · sensitive (25 mg) | 11:00 PM | 11:00 PM |
| Share of the 200 mg pregnancy limit | 12% | 1% |
One serving of each, over 16 hours
Common questions
Which has more caffeine, Starbucks decaf, brewed or Coffee, decaf?
Starbucks decaf, brewed (16 oz) has about 25 mg versus 2 mg in Coffee, decaf (8 oz): 23 mg more, or 12.5× as much.
Which is stronger per ounce, Starbucks decaf, brewed or Coffee, decaf?
Starbucks decaf, brewed: about 1.6 mg per fl oz versus 0.2 mg for Coffee, decaf. Serving size decides the total you actually drink.
How many Coffee, decaf servings equal one Starbucks decaf, brewed?
About 12.5 servings of Coffee, decaf (8 oz) match the caffeine in one Starbucks decaf, brewed (16 oz).
When should I stop drinking Starbucks decaf, brewed or Coffee, decaf before bed?
For an 11 PM bedtime with a 50 mg limit and a 5-hour half-life: last Starbucks decaf, brewed by 11:00 PM, last Coffee, decaf by 11:00 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.
Source — Starbucks decaf, brewed: Starbucks — Decaf Pike Place Roast nutrition (Grande), checked 2026-10-13.
Source — Coffee, decaf: USDA FoodData Central (SR Legacy 171889), checked 2026-10-13. 1 mg per 100 g × 237 g ≈ 2 mg.