Caffeine & Sleep
Soda

Caffeine in Pepsi

38mg
per 12 oz
10% of FDA daily max

Is that a lot?

Pepsi is 10% of the FDA’s recommended daily maximum, in a single 12 oz.

Green tea
28 mg
Pepsi
38 mg
Espresso
63 mg
Red Bull
80 mg
Coffee
95 mg
FDA daily max · 400mg
Before bed

When can I drink Pepsi and still sleep?

Your Pepsi cutoff
You drink it at
Bedtime
Pepsi · 38 mg · assuming an average ~5 h half-life
At bedtime
13 mg
close to optimal
Latest safe Pepsi: 11:00 PM

How much caffeine is in Pepsi?

A 12 oz Pepsi carries roughly 38 mg of caffeine, a notch above Coca-Cola but still a fraction of a coffee. Alongside it sits 41 grams of sugar, the sweeter half of that classic cola buzz.

ServingCaffeineSugar
12 oz38 mg41 g

Will Pepsi affect your sleep?

At 38 mg, Pepsi starts below the 50 mg threshold and clears within a couple of hours. The caffeine is unlikely to disturb sleep, though a sugary soda late at night can leave you wired.

Source: Manufacturer label

Related drinks

Pepsi & sleep — FAQ

The 38 mg of caffeine is mild and stays under the 50 mg threshold, so Pepsi itself probably won't keep you up, though its sugar near bedtime can be unsettling.

Pepsi has 38 mg per 12 oz — about 10% of the FDA’s 400 mg daily maximum for healthy adults.

It depends on your bedtime and how fast you clear caffeine. Use the calculator above to see when Pepsi drops below the ~50 mg “ok to sleep” threshold for your bedtime.

Track your caffeine. Sleep better.

The app does this live all day — one-tap logging, widgets, and a 30-minute pre-cutoff reminder. Free, no ads.

Get the App — it’s free