How much caffeine is in Starbucks Pistachio Frappuccino?
A Grande (16 fl oz) Starbucks Pistachio Frappuccino has 90 mg of caffeine.
That's about one cup of brewed coffee, and a quarter of the 400 mg a day the FDA cites for most healthy adults.
Source: starbucks.com · checked 10 Nov 2026
When did you have it?
Had at 3 pm, about 32 mg is still in you at an 11 pm bedtime. That should not affect most people’s sleep.
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Sizes
| Size | Volume | Caffeine | mg per fl oz |
|---|---|---|---|
| Tall | 12 fl oz (355 ml) | 60 mg | 5.0 |
| Grande shown above | 16 fl oz (473 ml) | 90 mg | 5.6 |
| Venti | 24 fl oz (710 ml) | 105 mg | 4.4 |
Source: starbucks.com · checked 10 Nov 2026
Latest time to drink it
For an 11 pm bedtime, most people should finish a Grande (16 fl oz) Starbucks Pistachio Frappuccino by about 6:15 pm. The table works it out for other bedtimes and for how sensitive you are: it is the latest time to start one so that the caffeine left stays under the line all night.
| Bedtime | Very sensitive under 25 mg | Average under 50 mg | Not very sensitive under 100 mg |
|---|---|---|---|
| 9 pm | 11:15 am | 4:15 pm | Any time |
| 10 pm | 12:15 pm | 5:15 pm | Any time |
| 11 pm | 1:15 pm | 6:15 pm | Any time |
| Midnight | 2:15 pm | 7:15 pm | Any time |
| 1 am | 3:15 pm | 8:15 pm | Any time |
For a Grande (16 fl oz) Starbucks Pistachio Frappuccino, average clearance (half-life 5 h), 8 hours of sleep. "Any time" means even one at bedtime stays under the line.
How long it lasts
The caffeine from a Grande (16 fl oz) Starbucks Pistachio Frappuccino peaks in your blood about 75 minutes after you start it, at roughly 77 mg. Half of it is gone in about 5 hours for an average adult; that ranges from roughly 3 to 7 hours, and longer in pregnancy or with some medicines.
| Time after | 3 hours | 6 hours | 9 hours | 12 hours |
|---|---|---|---|---|
| Still in you | 63 mg | 42 mg | 28 mg | 18 mg |
So one had at 3 pm leaves about 32 mg at 11 pm. How long caffeine lasts explains the curve.
How it compares
Starbucks Pistachio Frappuccino is stronger than 27% of the 90 coffee-shop drinks we track, by caffeine per serving.
Per fluid ounce (5.6 mg) it is stronger than 27% of them.
To reach 400 mg in a day you would need about 4½ of these.
Less caffeine
- Starbucks Banana Bread Latte 85 mg, Tall
- Starbucks Caramel Ribbon Crunch Frappuccino 85 mg, Grande
- Smoothie King Coffee High Protein 83 mg, 20 fl oz cup
More caffeine
- Starbucks Coffee Frappuccino 95 mg, Grande
- Starbucks Mocha Cookie Crumble Frappuccino 95 mg, Grande
- Dutch Bros Americano 96 mg, Medium
Same caffeine: Starbucks Caramel Brulée Frappuccino, Starbucks Caramel Frappuccino.
FAQ
Is Starbucks Pistachio Frappuccino high in caffeine?
It is moderate. A Grande (16 fl oz) Starbucks Pistachio Frappuccino has 90 mg, which is about the same as an 8 fl oz cup of brewed coffee (95 mg).
How much caffeine is in a Tall Starbucks Pistachio Frappuccino?
A Tall (12 fl oz) Starbucks Pistachio Frappuccino has 60 mg of caffeine, 30 mg less than a Grande (16 fl oz) Starbucks Pistachio Frappuccino.
How much caffeine is in a Venti Starbucks Pistachio Frappuccino?
A Venti (24 fl oz) Starbucks Pistachio Frappuccino has 105 mg of caffeine, 15 mg more than a Grande (16 fl oz) Starbucks Pistachio Frappuccino.
Can I drink Starbucks Pistachio Frappuccino at night?
Not if you want to sleep well. Had at 7 pm, it leaves about 55 mg in an average adult at an 11 pm bedtime, above the 50 mg most people sleep fine with. The latest time for an 11 pm bedtime is about 6:15 pm.
How long does the caffeine in Starbucks Pistachio Frappuccino last?
It peaks about 75 minutes after you start it. Of the 90 mg, about 42 mg is still in you 6 hours later and 18 mg after 12 hours, for an average adult with a 5-hour half-life.
Does Starbucks Pistachio Frappuccino have more caffeine than Red Bull?
Yes. A Grande (16 fl oz) Starbucks Pistachio Frappuccino has 90 mg; an 8.4 fl oz can of Red Bull has 80 mg.
Method and limits
The caffeine figure comes from starbucks.com; recipes, brewing and batches vary, so a real serving can differ. The curves use a standard one-compartment model with an average 5-hour half-life and a sleep-friendly line of 50 mg; your own body may clear caffeine faster or slower. How it works has the details.
These are estimates for information, not medical advice.
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