KFC · Fountain Drinks & Kids Drinks · United States
Mountain Dew Calories & Nutrition
A 20 fl oz Mountain Dew from KFC has 270 calories, 0g protein, 73g carbs, 0g fat and 73g sugar.
The crisp, one-of-a-kind taste of Mountain Dew goes perfectly with any chicken sandwich combo, chicken nuggets meal or fried chicken bucket.
Key facts
Calories
270 kcal
Protein
0g
Carbohydrates
73g
Sodium
85 mg
It ranks #25 of 28 fountain drinks & kids drinks from lowest to highest calories, with 78% more calories than the category average of 152 kcal.
Add to the KFC calculatorMountain Dew nutrition by size
Going from 30 fl oz to 12 fl oz saves 250 kcal.
Ingredients & allergens
Allergens:
No major allergens listed.
Allergens shown in capitals as declared by KFC. Recipes change and items are made on shared equipment, so always check in store if you have an allergy.
Lower-calorie alternatives
Mountain Dew: common questions
How many calories are in a 20 fl oz Mountain Dew?
A 20 fl oz Mountain Dew from KFC has 270 calories, 0g protein, 73g carbs, 0g fat and 73g sugar. That is 14% of the 2,000 kcal daily value for an average adult.
How many calories are in each size of Mountain Dew?
12 fl oz: 160 kcal; 16 fl oz: 220 kcal; 20 fl oz: 270 kcal; 30 fl oz: 410 kcal.
How much sugar is in Mountain Dew?
73g of total sugars, of which 0g are added sugars.
Is Mountain Dew dairy-free?
The official allergen information lists no milk in the standard build. KFC uses shared equipment, so traces are possible.
Source: KFC Full Nutrition Guide (official table on kfc.com/full-nutrition-guide, hosted by Nutritionix) (last updated 2026-10-02, retrieved 2026-10-16); KFC item nutrition labels: ingredients & allergens (same official tool) (retrieved 2026-10-16); KFC Nutrition Calculator (kfc.com/nutrition): Sweet Tea and Unsweet Tea (dataset 6826-0-1788988553, retrieved 2026-10-16); KFC Food Allergies & Sensitivities (retrieved 2026-10-16); kfc.com menu (product descriptions, combo contents and default picks) (retrieved 2026-10-16). Data checked 2026-10-16. KFC is a trademark of its owner; Fast Food Calc is independent and not affiliated with KFC.