Diet Dr Pepper
All 23 flavors, zero sugar, zero calories. This is a go-to for the classic Dr Pepper taste without anything to count.
A 12 fl oz can of Diet Dr Pepper has 0 calories, 0 g of sugar, 0 g of carbs, 60 mg of sodium and about 41 mg of caffeine. It is sweetened with aspartame alone, keeps the 23-flavor blend, and has exactly as much caffeine as regular Dr Pepper. Figures are from Keurig Dr Pepper's label, checked October 5, 2026.
Below is the full Diet Dr Pepper nutrition label, the ingredient list in label order, and how it stacks up against regular Dr Pepper and Dr Pepper Zero Sugar. I read every number off Keurig Dr Pepper's own Product Facts page, linked at the bottom.
Nutrition Facts
Size 12 fl oz can
| Per Serving | % DAILY VALUE |
|---|---|
| Calories: 0 | |
| Total Fat: 0 g | 0% |
| Sodium: 60 mg | 3% |
| Total Carbohydrate: 0 g | 0% |
| Total Sugars: 0 g | |
| Includes Added Sugars: 0 g | 0% |
| Protein: 0 g | |
| Caffeine: 41 mg |
*Based on a 2000 calorie diet
What are the ingredients in Diet Dr Pepper?
In label order:
- Carbonated Water
- Caramel Color
- Aspartame
- Phosphoric Acid
- Natural and Artificial Flavors
- Sodium Benzoate (preservative)
- Caffeine
Aspartame is the only sweetener. The FDA notes that people with the rare genetic disorder phenylketonuria (PKU) should avoid or restrict it. More on that, and on how Diet compares with Zero Sugar sweetener by sweetener, in what sweetener is in Diet Dr Pepper.
Diet Dr Pepper vs regular Dr Pepper
Same 12 fl oz can, same caffeine, same 0 g of fat and protein. Calories, sugar, sodium and the sweetener are what change.
| Per 12 fl oz can | Diet Dr Pepper | Dr Pepper |
|---|---|---|
| Calories | 0 | 150 |
| Total sugars | 0 g | 39 g |
| Sodium | 60 mg | 55 mg |
| Caffeine | 41 mg | 41 mg |
| Sweetener | Aspartame | High fructose corn syrup |
Diet Dr Pepper questions
Does Diet Dr Pepper have caffeine?
Yes. Keurig Dr Pepper lists about 41 mg of caffeine in a 12 fl oz can of Diet Dr Pepper, the same as regular Dr Pepper. If you want the diet taste without caffeine, Caffeine Free Diet Dr Pepper has 0 mg.
Is there sugar in Diet Dr Pepper?
No. A 12 fl oz can has 0 g of total sugars and 0 g of added sugars. The sweetness comes from aspartame, an FDA-approved sweetener that the FDA describes as about 200 times sweeter than table sugar.
How many calories and carbs are in Diet Dr Pepper?
0 calories and 0 g of total carbohydrate per 12 fl oz can, according to Keurig Dr Pepper's label. There is no fat or protein either; the only nutrient with a real number is sodium, at 60 mg (3% of the daily value).
What are the ingredients in Diet Dr Pepper?
Carbonated water, caramel color, aspartame, phosphoric acid, natural and artificial flavors, sodium benzoate (preservative) and caffeine, in label order. There is no high fructose corn syrup and no acesulfame potassium.
What is the difference between Diet Dr Pepper and Dr Pepper Zero Sugar?
Both have 0 calories, 0 g sugar, 60 mg sodium and 41 mg caffeine per can. The difference is the sweetener: Diet uses aspartame alone, while Zero Sugar uses aspartame plus acesulfame potassium and also lists sodium phosphate.
The no-caffeine version has its own page: Caffeine Free Diet Dr Pepper. Every variety and size is compared in how much caffeine is in Dr Pepper, and if a daily can is turning into a habit, here are the signs to watch for.
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References
- Keurig Dr Pepper Product Facts: Diet Dr Pepper 12 fl oz (label and ingredients)
- Keurig Dr Pepper Product Facts: Dr Pepper 12 fl oz (comparison)
- FDA: Aspartame and Other Sweeteners in Food
- Diet Dr Pepper official product page
Last checked October 5, 2026.
Keep exploring
Every Dr Pepper flavor
- Dr Pepper
- Dr Pepper Zero
- Dr Pepper Cream Soda
- Dr Pepper Cream Soda Zero
- Dr Pepper Cherry
- Dr Pepper Cherry Zero
- Dr Pepper Cherry Vanilla
- Diet Cherry Vanilla Dr Pepper
- Dr Pepper Strawberries & Cream
- Dr Pepper Strawberries & Cream Zero
- Dr Pepper Blackberry
- Dr Pepper Blackberry Zero
- Dr Pepper Creamy Coconut
- Dr Pepper Creamy Coconut Zero
- Dr Pepper Made with Real Sugar
- Caffeine Free Dr Pepper
- Caffeine Free Diet Dr Pepper