Drinks
Diet soda calories and nutrition
A 12 fl oz can of aspartame-sweetened diet cola (355 g) has 7 calories, with 0.4 g of protein, 1.0 g of carbs and 0.1 g of fat. That is 2 calories per 100 g.
Low-calorie aspartame-sweetened cola with caffeine. Data: USDA FoodData Central, “Beverages, carbonated, low calorie, cola or pepper-type, with aspartame, contains caffeine”. The entry is an aspartame-sweetened cola with caffeine. It does not describe every diet or zero-sugar soft drink; the product label identifies its sweetener, serving size and sodium.
Serving size
12 fl oz can · 355 g
7 calories
- Protein
- 0.4 g24% of calories · 1% DV
- Carbs
- 1.0 g62% of calories · 0% DV
- Fat
- 0.1 g14% of calories · 0% DV
- Fiber
- 0 g
- Sugars
- 0 g
- Saturated fat
- 0 g
- Sodium
- 28 mg
Why can zero calorie soft drinks show calories here?
This 12 fl oz aspartame-sweetened diet cola has 7 calories and 28 mg sodium in the USDA data. FDA labeling rules allow fewer than 5 calories per serving to be rounded to zero. This example is above that cutoff and is not a zero-calorie label claim. Use the actual product label for a zero-calorie drink. Sources ↓
Calories in diet soda by serving
| Serving | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 12 fl oz can355 g | 7 | 0.4 g | 1.0 g | 0.1 g |
| ½ serving177.5 g | 4 | 0.2 g | 0.5 g | 0.1 g |
| 2 servings710 g | 14 | 0.8 g | 2.1 g | 0.2 g |
| 100 g100 g | 2 | 0.1 g | 0.3 g | 0.0 g |
Serving weights are USDA’s household measures for this food.
Diet soda nutrition facts
Per 100 g, 2 calories: 24% from protein, 62% from carbs and 14% from fat.
| Nutrient | Per 100 g | Per serving12 fl oz can · 355 g | % Daily Value |
|---|---|---|---|
| Calories | 2 | 7 | – |
| Total fat | 0.0 g | 0.1 g | 0% |
| Saturated fat | 0 g | 0 g | 0% |
| Cholesterol | 0 mg | 0 mg | 0% |
| Sodium | 8.0 mg | 28 mg | 1% |
| Total carbohydrate | 0.3 g | 1.0 g | 0% |
| Dietary fiber | 0 g | 0 g | 0% |
| Total sugars | 0 g | 0 g | – |
| Protein | 0.1 g | 0.4 g | 1% |
| Vitamin D | 0 µg | 0 µg | 0% |
| Calcium | 3.0 mg | 11 mg | 1% |
| Iron | 0.1 mg | 0.4 mg | 2% |
| Potassium | 8.0 mg | 28 mg | 1% |
| Vitamin A | 0 µg | 0 µg | 0% |
| Vitamin C | 0 mg | 0 mg | 0% |
% Daily Value is per serving (12 fl oz can), using the FDA’s Daily Values. Calorie shares use 4 calories per gram of protein and carbs and 9 per gram of fat.
How long to walk it off
Walking at 3 mph, a 150-lb adult burns about 3.2 calories a minute on top of what they would burn at rest. So a 12 fl oz can of aspartame-sweetened diet cola (7 calories) takes about 2 minutes of walking, roughly 300 steps.
Compare calories by serving
A 12 fl oz can of aspartame-sweetened diet cola has 7 calories, 133 fewer calories than a 12 fl oz can of Coca-Cola (140 calories).
Related foods to explore
- Coca-Cola Can140 calories in one 12 fl oz can of Coca-Cola Original Taste
Diet soda questions
How much protein is in a 12 fl oz can of aspartame-sweetened diet cola?
A 12 fl oz can of aspartame-sweetened diet cola (355 g) has 0.4 g of protein, 1% of the 50 g Daily Value. That is 0.1 g per 100 g.
How much fiber is in a 12 fl oz can of aspartame-sweetened diet cola?
A 12 fl oz can of aspartame-sweetened diet cola (355 g) has 0 g of fiber, 0% of the 28 g Daily Value. That is 0 g per 100 g.
How much sodium is in diet soda?
The listed 12 fl oz diet cola has 28 mg sodium and 7 calories. Check the label for another diet soda because formulas differ.
Count it without looking it up.
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- U.S. Department of Agriculture, FoodData Central: Beverages, carbonated, low calorie, cola or pepper-type, with aspartame, contains caffeine (FDC ID 175099, SR Legacy, published 2019-04-01).
- eCFR: 21 CFR 101.9 nutrition labeling and calorie rounding.
- U.S. Food and Drug Administration. Daily Value on the Nutrition and Supplement Facts Labels.
- Walking time: the method of our walking calorie calculator (2024 Adult Compendium of Physical Activities; CADENCE-Adults for steps).
Prepared by the KaloCam team · Updated