McDonald's · Beverages · United States
Diet Coke Calories & Nutrition
A Medium Diet Coke from McDonald's has 0 calories, 0g protein, 0g carbs, 0g fat and 0g sugar.
Try an icy cold Diet Coke®, with zero calories. It’s a staple to any McDonald's meal available on the $1 $2 $3 Dollar Menu .
Key facts
Calories
0 kcal
Protein
0g
Carbohydrates
0g
Sodium
15 mg
It ranks #1 of 31 beverages from lowest to highest calories, with 100% fewer calories than the category average of 187 kcal.
Add to the McDonald's calculatorDiet Coke nutrition by size
Going from Extra Small to Small saves 0 kcal.
| Small | 0 | 0 | 0 | 0 | 50 | – |
| Medium | 0 | 0 | 0 | 0 | 15 | – |
| Large | 0 | 0 | 1 | 0 | 20 | – |
| Extra Small | 0 | 0 | 0 | 0 | 10 | – |
Ingredients & allergens
Allergens:
No major allergens listed.
Ingredients
Diet Coke: Carbonated Water, Caramel Color, Phosphoric Acid, Sodium Saccharin, Potassium Benzoate (to Protect Taste), Natural Flavors, Citric Acid, Caffeine, Potassium Citrate, Aspartame Ice: Ice.
Allergens shown in capitals as declared by McDonald's. Recipes change and items are made on shared equipment, so always check in store if you have an allergy.
Diet Coke: common questions
How many calories are in a Medium Diet Coke?
A Medium Diet Coke from McDonald's 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 Coke?
Small: 0 kcal; Medium: 0 kcal; Large: 0 kcal; Extra Small: 0 kcal.
Is Diet Coke dairy-free?
The official allergen information lists no milk in the standard build. McDonald's uses shared equipment, so traces are possible.
Source: McDonald's US Nutrition Calculator (menu definition) (retrieved 2026-10-15); McDonald's US item nutrition, ingredients & allergens (itemDetails JSON used by the calculator and product pages) (retrieved 2026-10-15); McDonald's US Full Menu (category pages incl. Sauces & Condiments, Happy Meal, Drinks) (retrieved 2026-10-15). Data checked 2026-10-15. McDonald's is a trademark of its owner; Fast Food Calc is independent and not affiliated with McDonald's.