Does Diet Mountain Dew Have Caffeine? – Answered

Diet Mountain Dew has caffeine and quite a bit of it for a soda. In this article, we outline how much caffeine is in its popular single-serve sizes. We also compare the caffeine in Diet Mountain Dew to other beverages. We think that you will have a solid idea of the caffeine in Diet Mountain Dew by the end of this article.

Diet Mountain Dew Caffeine

Diet Mountain Dew has 4.5 milligrams (mg) of caffeine per ounce. You can simply take the number of ounces of Diet Mountain Dew that you drink and times it by 4.5 to get the caffeine amount in that beverage. However, most people can use the table below that shows several popular serving sizes of Diet Dew and the caffeine in each size.

Serving SizeCaffeine(mg)Calories
7.5 fl. oz. 34mg0
12 fl. oz.54mg0
16 fl. oz.72mg5
16.9 fl. oz.77mg5
20 fl. oz.91mg10

Caffeine: Diet Mountain Dew Vs. Mountain Dew

Now that we have established that Diet Mountain Dew has caffeine, let’s look at how it compares to regular Mountain Dew. After all, regular Mountain Dew is known for its higher caffeine compared to other sodas.

The good news for caffeine lovers is that Diet Mountain Dew has the same amount of caffeine as regular Mountain Dew when comparing the same serving sizes. There is no benefit of drinking one soda over the other when it comes to caffeine.

Caffeine: Diet Mountain Dew Vs. Similar Beverages

It is often easier to determine how much caffeine is in a drink when there are comparables. Below you will see how the caffeine in Diet Mountain Dew compares to similar beverages. Overall, its caffeine is high for a soda but much lower than what is in many energy drinks like Monster and Rockstar or coffee beverages.

BeverageServing SizeCaffeine(mg)
Diet Mountain Dew12 fl. oz.54mg
Mello Yello Zero Sugar12 fl. oz.51mg
Mountain Zevia12 fl. oz.55mg
Faygo Moon Mist12 fl. oz.19.7mg
Coca-Cola 12 fl. oz.34mg
Diet Coke12 fl. oz.46mg
Diet Dr Pepper12. fl. oz. 41mg
Red Bull12 fl. oz.114mg
Monster Energy12 fl. oz.120mg
Coffee (Brewed)12 fl. oz.136mg (approximate)

Ingredients: Diet Mountain Dew

Diet Mountain Dew is a citrus soda made with concentrated orange juice. It is sweetened with acesulfame potassium, aspartame, and sucralose instead of sugar or high-fructose corn syrup which is found in regular sodas such as Dr Pepper and Coke. Caffeine is listed as an ingredient because it is added to the soda and not naturally occurring like in tea for example.

Diet Mtn Dew Ingredients: carbonated water, concentrated orange juice, citric acid, natural flavor, potassium benzoate (preserves freshness), citrus pectin, aspartame, potassium citrate, caffeine, sodium citrate, acesulfame potassium, sucralose, gum arabic, sodium benzoate (preserves freshness), calcium disodium EDTA (protects flavor), yellow 5.