Starbucks
How much caffeine is in Starbucks Espresso?
Data checked against the source on 2026-10-03 by Oleksii Y.
One Doppio, 1.5 fl oz (2 shots) of Starbucks Espresso has 150 mg of caffeine, according to Starbucks Coffee Company.
How Starbucks Espresso compares
- Strength: 341 mg per 100 ml.
- One Doppio, 1.5 fl oz (2 shots) has as much caffeine as about 1.5 cups of brewed coffee, which has 94.8 mg per 8 fl oz cup.
How much will be left at bedtime?
1 × Doppio, 1.5 fl oz (2 shots) of Starbucks Espresso
Left at 11:00 PM (8 h later), average metabolism
≈ 49 mg
Range 24–75 mg (fast to slow metabolism)
To be at 50 mg or less by bedtime, have 150 mg by 2:20 PM (average) or 9:34 AM (slow metabolism).
What sleep studies found near this dose
- Gardiner et al. 2023 (meta-analysis): To avoid losing sleep time, the authors suggest a coffee (107 mg per 250 ml) at least 8.8 hours before bed.
- Gardiner et al. 2023 (meta-analysis): For a pre-workout serving (217.5 mg), the authors suggest at least 13.2 hours before bed.
Estimate from a simple model: half-life of 3, 5 or 8 hours, 50 mg bedtime target. How we calculate
Caffeine by size
| Serving | Caffeine |
|---|---|
| Doppio, 1.5 fl oz (2 shots) | 150 mg |
| Solo, 0.75 fl oz (1 shot) | 75 mg |
| Triple (3 shots) | 225 mg |
| Quad (4 shots) | 300 mg |
How long does Starbucks Espresso stay in your system?
Our model halves caffeine every 5 hours for average metabolism, and every 3 or 8 hours for fast or slow metabolism. From one Doppio, 1.5 fl oz (2 shots) of Starbucks Espresso (150 mg), about 75 mg is still in your body 5 hours later and about 38 mg after 10 hours. If you clear caffeine slowly (an 8-hour half-life), about 63 mg is left after 10 hours.
Estimated caffeine left at 11:00 PM from one Doppio, 1.5 fl oz (2 shots) (150 mg), using a half-life of 5 hours for average metabolism and 3 to 8 hours for the range. How we calculate
| Had at | Left at bedtime (average) | Range |
|---|---|---|
| 8:00 AM (15 h before bed) | ≈ 19 mg | 5–41 mg |
| 12:00 PM (11 h before bed) | ≈ 33 mg | 12–58 mg |
| 3:00 PM (8 h before bed) | ≈ 49 mg | 24–75 mg |
| 6:00 PM (5 h before bed) | ≈ 75 mg | 47–97 mg |
How many fit in a day?
Reference amounts are for caffeine from all sources combined. Counted at the upper end of the stated amount, one serving at a time:
- Up to 400 mg a day for most healthy adults (FDA, EFSA): about 2 servings.
- Up to 200 mg at one time for healthy adults (EFSA): about 1 serving in one go.
- Up to 200 mg a day in pregnancy (EFSA, NHS): about 1 serving.
These are reference amounts for groups of people, not a personal limit. Some people feel jittery or sleep worse on much less. See the cutoff calculator for timing.
Good to know
Starbucks lists 75 mg for each espresso shot, from 75 mg for a Solo up to 300 mg for a Quad.
Starbucks Espresso vs other Starbucks espresso drinks
- Starbucks Caffè Americano: Starbucks Espresso has more caffeine than Starbucks Caffè Americano per 100 ml (341 vs 48 mg). Starbucks Espresso: 150 mg per Doppio, 1.5 fl oz (2 shots); Starbucks Caffè Americano: 225 mg per Grande, 16 fl oz. Per serving the order flips, because the servings differ in size.
- Starbucks Caffè Latte: Starbucks Espresso has more caffeine than Starbucks Caffè Latte per 100 ml (341 vs 32 mg). Starbucks Espresso: 150 mg per Doppio, 1.5 fl oz (2 shots); Starbucks Caffè Latte: 150 mg per Grande, 16 fl oz (hot). Per serving the order evens out, because the servings differ in size.
- Starbucks Coffee Frappuccino: Starbucks Espresso has more caffeine than Starbucks Coffee Frappuccino per 100 ml (341 vs 20 mg). Starbucks Espresso: 150 mg per Doppio, 1.5 fl oz (2 shots); Starbucks Coffee Frappuccino: 95 mg per Grande, 16 fl oz.
Common questions
How much caffeine is in Starbucks Espresso?
Starbucks Coffee Company gives 150 mg of caffeine per Doppio, 1.5 fl oz (2 shots). Other sizes are in the table on this page.
How many Starbucks Espresso servings can I have in a day?
The FDA and EFSA cite up to 400 mg of caffeine a day, from all sources combined, for most healthy adults. At 150 mg per Doppio, 1.5 fl oz (2 shots), that is about 2 servings if Starbucks Espresso is your only source. In pregnancy the reference is 200 mg a day.
How late can I drink Starbucks Espresso?
With an 11:00 PM bedtime, our model suggests having one serving by about 2:20 PM for average metabolism, or 9:34 AM if you clear caffeine slowly. This is an estimate, not a rule.
How long does Starbucks Espresso stay in your system?
Of the 150 mg in one Doppio, 1.5 fl oz (2 shots), roughly 75 mg remains after 5 hours and 38 mg after 10 hours with our average 5-hour half-life. From fast to slow metabolism, 10 hours later it is between 15 and 63 mg.
Where the number comes from
- Espresso. Starbucks Coffee Company. Nutrition "Caffeine" field for each size (Solo 75, Doppio 150, Triple 225, Quad 300 mg); page data from /apiproxy/v1/ordering/410/hot. Accessed 2026-10-02. Source ↗
Recipes and labels change. If a number here no longer matches the label, the label wins.
General information, not medical advice
If you feel unwell after caffeine — for example chest pain, a fast or irregular heartbeat that does not settle, fainting, confusion or trouble breathing — get urgent medical help. If you are pregnant or breastfeeding, under 18, take medication, or have a heart, liver or anxiety condition, high blood pressure or a sleep disorder, ask a doctor or pharmacist what amount is right for you.
Sources
- U.S. Food and Drug Administration (2024). Spilling the Beans: How Much Caffeine is Too Much? FDA Consumer Updates. fda.gov ↗
- European Food Safety Authority. Caffeine | EFSA. EFSA topic page (summary of the 2015 Scientific Opinion on the safety of caffeine). efsa.europa.eu ↗
- NHS. Foods to avoid in pregnancy. NHS. nhs.uk ↗
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