1 can (medium) of Diet Coke (330 g) has 1 calories. That works out to 0 calories per 100 g. It contains 0 g of carbs, 0 g of protein, 0 g of fat and 0 g of fiber. Its glycemic index is 0 (low), so it raises blood sugar slowly.

What is Diet Coke?

Diet Coke is Coca-Cola’s sugar-free cola, made with sweeteners rather than sugar. It keeps the familiar dark caramel colour and cola flavour, with a lively fizz. Serve it well chilled, straight from the can or over ice. It is a familiar choice alongside sandwiches, burgers and other casual meals, and can also be enjoyed on its own as a cold, fizzy drink.

Its crisp, lightly sharp taste is most refreshing when cold. Diet Coke contains no sugar or carbohydrates and is very low in calories: the supplied figure is 0.4 kcal per 100 g. It can suit people looking to cut back on sugary drinks, though it need not replace water as an everyday drink. A wedge of lemon or plenty of ice makes a simple, refreshing serving.

Diet Coke Nutrition Facts

Selected: 100 g

KCAL / 100G

Carbs

· 0% DV

Protein

· 0% DV

Fat

· 0% DV

Fiber

· 0% DV

DV is the share of the daily value covered, on a 2,000 kcal reference diet.

Calories come from: Carbs 0% · Protein 0% · Fat 100%

Diet Coke Vitamins & Minerals

Vitamins

Vitamin A

0µg · 0% DV

0mg · 0% DV

Minerals

Sodium

13mg · 1% DV

Calcium

2mg · 0% DV

Iron

0mg · 0% DV

Magnesium

1mg · 0% DV

How Nutritious Is Diet Coke?

Nutrient density

Low

1/ 100

How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.

Satiety score

Medium

40/ 100

An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.

Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.

Diet Coke Glycemic Index

GLYCEMIC INDEX

Low

0 Low5570100

GLYCEMIC LOAD

Low

Accounts for portion size — a more realistic measure than GI alone.

How to Burn Off Diet Coke

Is Diet Coke Processed?

NOVA 4

Ultra-Processed

1. Unprocessed

2. Minimally Processed

3. Processed

4. Ultra-Processed

NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.

Does Diet Coke Contain Allergens?

No known major allergens

Gluten free

Dairy free

Eggs free

Peanuts free

Tree nuts free

Fish free

Soy free

Sesame free

Which Diets Is Diet Coke Good For?

Vegan

✓ Suitable

Vegetarian

✓ Suitable

Gluten-Free

✓ Suitable

Dairy-Free

— Not suitable

Mediterranean

✓ Suitable

Paleo

✓ Suitable

Whole30

— Not suitable

DASH

— Not suitable

Keto

✓ Suitable

Low FODMAP

— Not suitable

Diet Coke Fat Profile

SATURATED

MONOUNSATURATED

POLYUNSATURATED

Compare Diet Coke

🥤vs☕️

Diet Coke vs Turkish coffee7 kcal fewer per 100 g

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Diet Coke vs Ayran37 kcal fewer per 100 g

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Diet Coke vs Iced Tea20 kcal fewer per 100 g

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Diet Coke vs Tea1 kcal fewer per 100 g

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Foods Similar to Diet Coke

☕️

Turkish coffee

7 kcal

🥛

Ayran

37 kcal

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Iced Tea

20 kcal

🍵

Tea

1 kcal

🥤

Detox Water

2 kcal

🥤

Soda

42 kcal

☕️

Coffee

2 kcal

🥤

Cola

42 kcal

Frequently Asked Questions About Diet Coke

Is Diet Coke caffeine-free?

No, standard Diet Coke contains caffeine. Caffeine-free versions are sold in some markets, so look for that wording on the can if you want to avoid caffeine; the regular version may affect sleep when consumed late.

What is the difference between Diet Coke and Coke Zero Sugar?

They use different recipes and have distinct tastes. Diet Coke has its own lighter, sharper flavor, while Coke Zero Sugar is designed to taste more like original Coca-Cola; formulations can vary by country.

Does Diet Coke contain aspartame?

Yes, Diet Coke is sweetened with aspartame in many markets, though recipes differ by region. People with phenylketonuria (PKU) need to avoid aspartame, so check the local product information.

Does Diet Coke damage your teeth?

It can contribute to enamel erosion because it is acidic, even though it contains no sugar. Frequent sipping keeps teeth exposed for longer; having it with a meal and rinsing with water afterward can limit contact.

Does Diet Coke raise blood sugar?

Usually, Diet Coke does not raise blood sugar the way a sugar-sweetened soda does because it contains no sugar. If you have diabetes, consider your individual glucose response and follow your clinician’s advice for managing it.

Can Diet Coke help you lose weight?

Replacing a sugary soda with Diet Coke can reduce sugar and calorie intake, but Diet Coke itself does not cause weight loss. It may help as a swap if it replaces—not adds to—other drinks or snacks.

Can you drink Diet Coke while pregnant?

Yes, it can be included during pregnancy, but it contains caffeine. Count caffeine from coffee, tea, chocolate, and other sources toward your daily total, and ask your healthcare professional for guidance on your personal limit.

Does Diet Coke hydrate you?

Yes, Diet Coke contributes fluid, but water is a better everyday choice. Its caffeine is not usually enough to cancel out the fluid it provides, although drinking it regularly may add acidity and caffeine you do not need.

Why does Diet Coke taste different from regular Coke?

Diet Coke uses a different recipe and non-sugar sweeteners, so its sweetness and finish differ from regular Coke. The distinct flavor is intentional; it is not simply regular Coke with the sugar removed.

How should you store Diet Coke after opening it?

Keep opened Diet Coke covered in the refrigerator and drink it soon, while it is still fizzy and tastes fresh. Leaving it open lets carbon dioxide escape, making the drink flat.

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Nutrition data compiled from USDA FoodData Central and scientific sources.

· Last updated: September 24, 2026