US · Soft drinks
How much caffeine is in Pepsi Zero Sugar?
The current US 20 fl oz bottle lists 63 mg. Smaller cans and recipes sold in other markets can differ.
Does this figure apply to a can or to UK Pepsi Max?
The recorded 63 mg belongs to a US 20 fl oz / 591 ml Pepsi Zero Sugar bottle. It does not establish the caffeine in a smaller can, another recipe or UK Pepsi Max. Match the product name, country and package on your label before adjusting the volume below.
For half of that same documented bottle, the calculated amount is 31.5 mg. This portion calculation does not verify the recipe in another package.
Check Pepsi Max versus Pepsi Zero Sugar and the UK source gap · Calculate from your own product label · Compare the named Pepsi and Diet Coke servings
Interactive serving
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Where this figure comes from
- Source
- PepsiCo Product Facts
- Source type
- Manufacturer
- Market
- US
- How we got the amount
- Manufacturer listed
- Source reviewed
- 21 August 2026
US product and serving; smaller packages and other markets can differ.
Estimated caffeine remaining over time
These figures apply CaffCalc’s exponential model to the adjusted 63 mg starting value. They are calculations, not measurements of caffeine in a particular person.
| Hours elapsed | 3-hour half-life | 5-hour half-life | 7-hour half-life |
|---|---|---|---|
| 0 | 63 mg | 63 mg | 63 mg |
| 3 | 31.5 mg | 41.6 mg | 46.8 mg |
| 5 | 19.8 mg | 31.5 mg | 38.4 mg |
| 8 | 9.9 mg | 20.8 mg | 28.5 mg |
| 10 | 6.3 mg | 15.8 mg | 23.4 mg |
| 12 | 3.9 mg | 11.9 mg | 19.2 mg |
With the central five-hour model, the estimate falls below 25 mg after approximately 6.7 hours. The faster and slower columns show why one fixed clearance time shouldn’t be treated as a personal fact.
Use this caffeine value
Use this amount in a calculation, or save the drink to your tracker on this device.
Same category, lower documented dose
Looking for less caffeine?
Here are some drinks in the same category with less listed caffeine. This compares caffeine only, not overall health benefits. Check each drink’s source note before choosing.