Does Diet Dr Pepper Have Caffeine?

Yes, Diet Dr Pepper has caffeine. A 12 fl oz can has 41 milligrams of caffeine.

Here is the caffeine content of Diet Dr Pepper for some of its popular serving sizes:

Diet Dr Pepper Caffeine Content

Serving SizeCaffeine (mg)Caffeine(mg)/ fl oz
7.5 fl oz263.47
8 fl oz283.5
10 fl oz343.4
12 fl oz413.42
14 fl oz483.43
16 fl oz553.44
16.9 fl oz583.43
20 fl oz683.4

Diet Dr Pepper Comparisons

Here are a few comparisons between the caffeine in Diet Dr Pepper vs other beverage:

BeverageServing SizeCaffeine (mg)
Diet Dr Pepper12 fl oz41
Dr Pepper (Regular)12 fl oz41
Coca-Cola Classic12 fl oz34
Diet Coke12 fl oz46
Diet Mtn Dew12 fl oz54
Coffee12 fl oz136*
*Source – USDA

Diet Dr Pepper Ingredients

 Carbonated water, caramel color, aspartame, phosphoric acid, natural and artificial flavors, sodium benzoate (preservative), caffeine

Image Credit – nathanmac87/flickr