Taco Bell · Fountain Drinks & Coffee · United States
Diet Pepsi Calories & Nutrition
A 20 oz Diet Pepsi from Taco Bell has 0 calories, 0g protein, 0g carbs, 0g fat and 0g sugar.
A crisp tasting, refreshing pop of sweet, fizzy bubbles without sugar, calories or carbs.
Key facts
Calories
0 kcal
Protein
0g
Carbohydrates
0g
Sodium
95 mg
It ranks #2 of 19 fountain drinks & coffee from lowest to highest calories, with 100% fewer calories than the category average of 142 kcal.
Add to the Taco Bell calculatorDiet Pepsi nutrition by size
Going from 30 oz to 16 oz saves 0 kcal.
Ingredients & allergens
Allergens:
No major allergens listed.
Allergens shown in capitals as declared by Taco Bell. Recipes change and items are made on shared equipment, so always check in store if you have an allergy.
Diet Pepsi: common questions
How many calories are in a 20 oz Diet Pepsi?
A 20 oz Diet Pepsi from Taco Bell has 0 calories, 0g protein, 0g carbs, 0g fat and 0g sugar. That is 0% of the 2,000 kcal daily value for an average adult.
How many calories are in each size of Diet Pepsi?
16 oz: 0 kcal; 20 oz: 0 kcal; 30 oz: 0 kcal.
Is Diet Pepsi dairy-free?
The official allergen information lists no milk in the standard build. Taco Bell uses shared equipment, so traces are possible.
Source: Taco Bell Full Nutrition Information (official table on tacobell.com/nutrition/info, hosted by Nutritionix) (last updated 2026-10-15, retrieved 2026-10-16); Taco Bell item nutrition labels: ingredients & allergens (same official tool) (retrieved 2026-10-16); Taco Bell Allergen Information (retrieved 2026-10-16); tacobell.com national menu & product pages (menu scope, descriptions, combo contents) (retrieved 2026-10-16). Data checked 2026-10-16. Taco Bell is a trademark of its owner; Fast Food Calc is independent and not affiliated with Taco Bell.