How much caffeine is in Starbucks Iced Chaider?
A Grande (16 fl oz) Starbucks Iced Chaider has 30 mg of caffeine.
That's about a quarter of a cup of brewed coffee, and 8% 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 11 mg is still in you at an 11 pm bedtime. That should not affect most people’s sleep.
Your whole day, every drink, in the free CaffeineIQ check. The iPhone app is coming soon.
Sizes
| Size | Volume | Caffeine | mg per fl oz |
|---|---|---|---|
| Tall | 12 fl oz (355 ml) | 15 mg | 1.3 |
| Grande shown above | 16 fl oz (473 ml) | 30 mg | 1.9 |
| Venti | 24 fl oz (710 ml) | 45 mg | 1.9 |
| Trenta | 30 fl oz (887 ml) | 60 mg | 2.0 |
Source: starbucks.com · checked 10 Nov 2026
Latest time to drink it
For an 11 pm bedtime, a Grande (16 fl oz) Starbucks Iced Chaider stays under the 50 mg most people sleep fine with, even late in the evening. 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 | 7:20 pm | Any time | Any time |
| 10 pm | 8:20 pm | Any time | Any time |
| 11 pm | 9:20 pm | Any time | Any time |
| Midnight | 10:20 pm | Any time | Any time |
| 1 am | 11:20 pm | Any time | Any time |
For a Grande (16 fl oz) Starbucks Iced Chaider, 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 Iced Chaider peaks in your blood about 75 minutes after you start it, at roughly 26 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 | 21 mg | 14 mg | 9.2 mg | 6.1 mg |
So one had at 3 pm leaves about 11 mg at 11 pm. How long caffeine lasts explains the curve.
How it compares
Starbucks Iced Chaider is stronger than 2% of the 90 coffee-shop drinks we track, by caffeine per serving.
Per fluid ounce (1.9 mg) it is stronger than 2% of them.
To reach 400 mg in a day you would need about 13 of these.
Less caffeine
- Starbucks Decaf Pike Place Roast 25 mg, Grande
- Starbucks Hot Chocolate 25 mg, Grande
- Starbucks Strawberry Crème Frappuccino no caffeine
More caffeine
- Dutch Bros Chai 35 mg, Medium hot
- Starbucks London Fog Latte 40 mg, Grande
- Starbucks Dragon Drink 50 mg, Grande
FAQ
Is Starbucks Iced Chaider high in caffeine?
It is moderate. A Grande (16 fl oz) Starbucks Iced Chaider has 30 mg, which is 32% of the 95 mg in an 8 fl oz cup of brewed coffee.
How much caffeine is in a Tall Starbucks Iced Chaider?
A Tall (12 fl oz) Starbucks Iced Chaider has 15 mg of caffeine, 15 mg less than a Grande (16 fl oz) Starbucks Iced Chaider.
How much caffeine is in a Trenta Starbucks Iced Chaider?
A Trenta (30 fl oz) Starbucks Iced Chaider has 60 mg of caffeine, 30 mg more than a Grande (16 fl oz) Starbucks Iced Chaider.
Can I drink Starbucks Iced Chaider at night?
For most people, yes: even late in the evening a Grande (16 fl oz) Starbucks Iced Chaider stays under 50 mg at an 11 pm bedtime.
How long does the caffeine in Starbucks Iced Chaider last?
It peaks about 75 minutes after you start it. Of the 30 mg, about 14 mg is still in you 6 hours later and 6.1 mg after 12 hours, for an average adult with a 5-hour half-life.
Does Starbucks Iced Chaider have more caffeine than Red Bull?
No. A Grande (16 fl oz) Starbucks Iced Chaider has 30 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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