Diet Pepsi contains approximately 35 to 36.7 mg of caffeine per 12 fluid ounce (355 ml) serving
. This caffeine content is slightly less than regular Pepsi, which has around 37 to 38 mg per 12 oz, and significantly less than Pepsi Zero Sugar (Pepsi Max), which contains about 69 mg per 12 oz
. To summarize:
- Diet Pepsi: ~35–36.7 mg caffeine per 12 oz
- Regular Pepsi: ~37–38 mg caffeine per 12 oz
- Pepsi Zero Sugar (Pepsi Max): ~69 mg caffeine per 12 oz
Diet Pepsi Wild Cherry and other flavored Diet Pepsi variants contain a bit more caffeine, around 38 mg per 12 oz
. Thus, a standard 12 oz can or bottle of Diet Pepsi has about 35 mg of caffeine, making it a moderate caffeine source compared to other sodas and much less than coffee.
