How many carbs are in water?
1 fl oz of water contains about 0g of carbohydrate, 0g of protein, and 0 calories.
Carbs by portion size
| Portion | Total carbs | Fiber | Net carbs |
|---|---|---|---|
| 1 fl oz (30g) | 0g | 0g | 0g |
| 1 cup (240g) | 0g | 0g | 0g |
| 100 grams (100g) | 0g | 0g | 0g |
Net carbs in water
1 fl oz of water contains 0g of net carbs — total carbs (0g) minus dietary fiber (0g). Net carbs are the carbs your body actually digests and that raise blood glucose. See our guide to net carbs for how this calculation works and when to use it.
Full nutrition for water (per 100g)
- Calories: 0 kcal
- Carbohydrate: 0g
- Dietary fiber: 0g
- Sugars: 0g
- Protein: 0g
- Fat: 0g
Reference values from USDA FoodData Central (survey fndds dataset, fdcId 2346282). Values are per 100 grams.
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Download on the App StoreFrequently asked questions
How many carbs are in water?
1 fl oz of water contains about 0g of total carbohydrate. After subtracting 0g of fiber, the net carbs are about 0g.
How many net carbs are in water?
Net carbs in 1 fl oz of water are about 0g — that is total carbs (0g) minus dietary fiber (0g). See our net carbs explainer for the full calculation.
Is water good for diabetics?
Water contains carbohydrates that will raise blood glucose. Whether it fits your meal plan depends on the portion and your overall daily target. Most U.S. diabetes care teams use total carbs (not net) for insulin dosing — see our diabetes carb-counting guide.
Is water keto-friendly?
Whether water fits a keto plan depends on your daily net-carb budget (typically under 20–30g per day). One serving (1 fl oz) provides about 0g of net carbs.