Caffeine in Coca-Cola
A 330 ml can of Coca-Cola holds about 32 mg of caffeine, half an espresso.
| Caffeine per serving | 32 mg |
| Serving | 11.2 oz can (330 ml) |
| Caffeine per 100 ml | 9.7 mg |
| Share of the 400 mg daily limit | 8% |
| Equal to filter coffee | 0.3 mugs |
| Equal to espresso | 0.5 shots |
How late can you have it?
At 32 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
Cola is the mildest caffeinated drink most people have regularly, at about 9.7 mg per 100 ml. A 500 ml bottle is around 48 mg, a 1.5 litre bottle about 145 mg.
It is small per can and quietly cumulative. Four cans across a day is 128 mg, more than a mug of filter coffee, and the last one is often the closest to bedtime.
32 mg is already under the 40 mg sleep threshold, so a single can will not by itself keep a typical adult awake. It stacks on top of whatever else is still in you.
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 Coca-Cola?
Coca-Cola has about 32 mg of caffeine per 11.2 oz can (330 ml). That is 8% of the 400 mg daily limit for a healthy adult, or about 0.3 mugs of filter coffee.
Will Coca-Cola keep me awake?
On its own it is unlikely to. At 32 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 Coca-Cola can I have in a day?
About 12, 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.
