CaffeineIQ

How much caffeine is in Starbucks Mocha Frappuccino?

A Grande (16 fl oz) Starbucks Mocha Frappuccino has 100 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?

50 mgBed 11 pm: 35 mg6am9am12pm3pm6pm9pm12am3am

Had at 3 pm, about 35 mg is still in you at an 11 pm bedtime. That should not affect most people’s sleep.

Bedtime

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Sizes

SizeVolumeCaffeinemg per fl oz
Tall12 fl oz (355 ml)70 mg5.8
Grande shown above16 fl oz (473 ml)100 mg6.3
Venti24 fl oz (710 ml)130 mg5.4

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 Mocha Frappuccino by about 5:30 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.

BedtimeVery sensitive
under 25 mg		Average
under 50 mg		Not very sensitive
under 100 mg
9 pm10:30 am3:30 pmAny time
10 pm11:30 am4:30 pmAny time
11 pm12:30 pm5:30 pmAny time
Midnight1:30 pm6:30 pmAny time
1 am2:30 pm7:30 pmAny time

For a Grande (16 fl oz) Starbucks Mocha 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 Mocha Frappuccino peaks in your blood about 75 minutes after you start it, at roughly 85 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 after3 hours6 hours9 hours12 hours
Still in you70 mg46 mg31 mg20 mg

So one had at 3 pm leaves about 35 mg at 11 pm. How long caffeine lasts explains the curve.

How it compares

Starbucks Mocha Frappuccino is stronger than 35% of the 90 coffee-shop drinks we track, by caffeine per serving.

Per fluid ounce (6.3 mg) it is stronger than 33% of them.

To reach 400 mg in a day you would need about 4 of these.

Less caffeine

More caffeine

Same caffeine: Starbucks Pumpkin Spice Frappuccino.

FAQ

Is Starbucks Mocha Frappuccino high in caffeine?

Yes. A Grande (16 fl oz) Starbucks Mocha Frappuccino has 100 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 Mocha Frappuccino?

A Tall (12 fl oz) Starbucks Mocha Frappuccino has 70 mg of caffeine, 30 mg less than a Grande (16 fl oz) Starbucks Mocha Frappuccino.

How much caffeine is in a Venti Starbucks Mocha Frappuccino?

A Venti (24 fl oz) Starbucks Mocha Frappuccino has 130 mg of caffeine, 30 mg more than a Grande (16 fl oz) Starbucks Mocha Frappuccino.

Can I drink Starbucks Mocha Frappuccino at night?

Not if you want to sleep well. Had at 7 pm, it leaves about 61 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 5:30 pm.

How long does the caffeine in Starbucks Mocha Frappuccino last?

It peaks about 75 minutes after you start it. Of the 100 mg, about 46 mg is still in you 6 hours later and 20 mg after 12 hours, for an average adult with a 5-hour half-life.

Does Starbucks Mocha Frappuccino have more caffeine than Red Bull?

Yes. A Grande (16 fl oz) Starbucks Mocha Frappuccino has 100 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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