Calories in Diet Coke
Coca-Cola, sugar-free cola (US label). 0 kcal (0 kJ) per 100 ml. Choose a portion below and every figure on the page updates.
Manufacturer data. The figures for Diet Coke come from the manufacturer’s nutrition label, not from USDA laboratory analysis. Recipes and labels differ between countries and change over time, so check the pack you have.
Diet Coke is a sugar-free cola sweetened with aspartame, and its label lists 0 kcal (0 kJ) for a full 12 fl oz (355 ml) can, with no fat, carbohydrate, sugar or protein. In some countries the same drink is sold as Coca-Cola Light. Coke Zero Sugar is a separate zero-calorie recipe with a taste closer to regular Coca-Cola, but the energy figure is the same: effectively nothing.
Where the energy comes from
Share of total energy contributed by each macronutrient, using the standard 4/4/9 kcal per gram factors:
No measurable energy from protein, carbohydrate, fat or alcohol.
Full nutrition breakdown
Values shown for 355 ml.
| Nutrient | Amount | % Daily Value |
|---|---|---|
| Energy | 0 kcal | – |
| Energy | 0 kJ | – |
| Protein | 0 g | 0% |
| Total fat | 0 g | 0% |
| Total carbohydrate | 0 g | 0% |
| Sugars | 0 g | – |
| Fibre | 0 g | 0% |
| Caffeine | 46 mg | – |
| Minerals | ||
| Sodium | 40.1 mg | 2% |
Daily Values are the FDA reference intakes for adults and children aged 4 and over, based on a 2,000 kcal diet. They are a labelling standard, not a personal target.
Common portions
| Portion | ml | kcal | kJ | Protein g | Carbs g | Fat g |
|---|---|---|---|---|---|---|
| 1 can (12 fl oz, 355 ml) | 355 | 0 | 0 | 0 | 0 | 0 |
| 1 can (330 ml) | 330 | 0 | 0 | 0 | 0 | 0 |
| 1 bottle (20 fl oz, 591 ml) | 591 | 0 | 0 | 0 | 0 | 0 |
| 1 glass (250 ml) | 250 | 0 | 0 | 0 | 0 | 0 |
Things worth knowing
- "0 calories" on a US label means less than 5 kcal per serving. The small amount of energy from flavourings is too little to matter for anyone tracking intake.
- One 355 ml can contains 46 mg of caffeine and 40 mg of sodium, according to Coca-Cola. Regular Coca-Cola has 34 mg of caffeine in the same can, so Diet Coke is slightly stronger.
- Compared with regular Coca-Cola, a can of Diet Coke saves about 140 kcal (586 kJ) and 39 g of sugar.
- The label carries a phenylketonuria warning because aspartame contains phenylalanine. Recipes and sweeteners differ between countries, so check the local can.
Converting these figures
One 1 can (12 fl oz, 355 ml) of Diet Coke is 0 kcal, which is 0 kJ. To convert any other figure, divide kilojoules by 4.184 for calories, or use the converter on the home page.
With no measurable energy, no amount of Diet Coke adds up to 1,000 kJ (239 kcal). See what does on the 1000 kJ to calories page.
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Source: Manufacturer label (The Coca-Cola Company, coca-cola.com, US 12 fl oz can), checked October 2026. Values are the manufacturer’s declared figures per 100 ml.