Caffeine in Pepsi
A 330 ml can of Pepsi holds about 36 mg of caffeine, slightly more than Coca-Cola.
| Caffeine per serving | 36 mg |
| Serving | 11.2 oz can (330 ml) |
| Caffeine per 100 ml | 11 mg |
| Share of the 400 mg daily limit | 9% |
| Equal to filter coffee | 0.4 mugs |
| Equal to espresso | 0.6 shots |
How late can you have it?
At 36 mg this sits below 40 mg, the line Cira uses as low enough to sleep on, so on its own it is unlikely to keep you awake. It still adds to whatever else is already in you.
What to know
Pepsi runs at roughly 11 mg per 100 ml, a little above Coca-Cola and a little below Diet Coke. In practice the three are interchangeable for sleep purposes.
Pepsi Max is dosed higher, near 43 mg a can, in line with the other maximum-taste sugar-free colas.
Three cans across an afternoon is about 108 mg, comparable to a mug of filter coffee and spread over the hours when it matters least.
Compared with the rest of the soft drinks
| Drink | Serving | Caffeine |
|---|---|---|
| Mountain Dew | 11.2 oz can (330 ml) | 50 mg |
| Diet Coke | 11.2 oz can (330 ml) | 42 mg |
| Dr Pepper | 11.2 oz can (330 ml) | 40 mg |
| Pepsi | 11.2 oz can (330 ml) | 36 mg |
| Coke Zero | 11.2 oz can (330 ml) | 33 mg |
| Coca-Cola | 11.2 oz can (330 ml) | 32 mg |
Common questions
How much caffeine is in Pepsi?
Pepsi has about 36 mg of caffeine per 11.2 oz can (330 ml). That is 9% of the 400 mg daily limit for a healthy adult, or about 0.4 mugs of filter coffee.
Will Pepsi keep me awake?
On its own it is unlikely to. At 36 mg it stays below 40 mg, the line Cira uses as low enough to sleep on. It still adds to any caffeine already in you.
How many servings of Pepsi can I have in a day?
About 11, going by the 400 mg daily limit for healthy adults. That limit covers everything else with caffeine in it too, so the real number is lower on a day with other coffee, tea or cola.
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Where these numbers come from
Caffeine content is the typical value for the serving shown, the same figure the Cira app uses. Brands and brew methods vary, so treat it as a good estimate rather than a measurement of your cup. The 5.7 hour half-life is a typical value for healthy adults, the 40 mg sleep line is a working threshold of the model, and the 400 mg daily limit is the figure used by the European Food Safety Authority and the US FDA. How the numbers are worked out.
