Cappuccino vs Flat white: caffeine compared
Flat white (12 oz) has 130 mg of caffeine, 55 mg more than Cappuccino (12 oz, 75 mg) — 1.7× as much per serving. Per fluid ounce, Flat white is the stronger drink: 10.8 mg/oz versus 6.2 mg/oz.
| Cappuccino | Flat white | |
|---|---|---|
| Serving | 12 oz | 12 oz |
| Caffeine per serving | 75 mg | 130 mg |
| Per fl oz | 6.2 mg | 10.8 mg |
| Share of 400 mg/day | 19% | 32% |
| Servings to reach 400 mg | 5.3 | 3.1 |
| Hours until under 50 mg | 2.9 h | 6.9 h |
| Last one for an 11 PM bedtime · standard (50 mg) | 8:05 PM | 4:06 PM |
| Last one for an 11 PM bedtime · sensitive (25 mg) | 3:05 PM | 11:06 AM |
| Share of the 200 mg pregnancy limit | 38% | 65% |
One serving of each, over 16 hours
Common questions
Which has more caffeine, Cappuccino or Flat white?
Flat white (12 oz) has about 130 mg versus 75 mg in Cappuccino (12 oz): 55 mg more, or 1.7× as much.
Which is stronger per ounce, Cappuccino or Flat white?
Flat white: about 10.8 mg per fl oz versus 6.2 mg for Cappuccino. Serving size decides the total you actually drink.
How many Cappuccino servings equal one Flat white?
About 1.7 servings of Cappuccino (12 oz) match the caffeine in one Flat white (12 oz).
When should I stop drinking Cappuccino or Flat white before bed?
For an 11 PM bedtime with a 50 mg limit and a 5-hour half-life: last Cappuccino by 8:05 PM, last Flat white by 4:06 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 — Cappuccino: CSPI caffeine chart (Starbucks Cappuccino, 12 oz tall), checked 2026-10-13.
Source — Flat white: Starbucks — Flat White nutrition (Tall 12 oz), checked 2026-10-13.