Carbs in Tonic Water
How many carbs are in tonic water?
Tonic Water has 9.3g net carbs per 100g — 9.3g total carbs minus 0g fiber — plus 0g protein, 0g fat, and 35 calories. 12 fl oz (355g) works out to about 33g net carbs and 124 calories. That makes tonic water relatively low in net carbs and lower than the typical drink, which averages about 20.7g net carbs per 100g. At this carb count, tonic water is best limited to small portions on keto (usually 20–50g net carbs per day). Values are per per 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
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Free · no signup · ★ 4.7Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 12 fl oz | 33g | 33g | 0g | 124 |
| 100 g (3.5 oz) | 9.3g | 9.3g | 0g | 35 |
| 1 oz (28 g) | 2.6g | 2.6g | 0g | 10 |
How many calories are in tonic water?
Tonic Water has 35 calories per 100g. 12 fl oz (355g) has about 124 calories. That's alongside 0g protein, 0g fat, and 9.3g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 35 |
| Total carbs | 9.3g |
| Net carbs | 9.3g |
| Fiber | 0g |
| Sugar | 9.3g |
| Sugar alcohols | 0g |
| Protein | 0g |
| Fat | 0g |
| Sodium | 11mg |
| Potassium | 0mg |
Source: Manufacturer-reported values (drinks). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in tonic water?
- Tonic Water has 9.3g of total carbs and 9.3g of net carbs per 100 grams.
- How many net carbs are in tonic water?
- Tonic Water has 9.3g of net carbs per 100 grams (total carbs 9.3g minus 0g fiber).
- Is tonic water keto-friendly?
- Tonic Water has 9.3g net carbs per 100g, which is high for keto. Enjoy it in small portions or save it for higher-carb days.
- How many calories are in tonic water?
- Tonic Water has 35 calories per 100 grams.
- How many carbs are in 12 fl oz of tonic water?
- 12 fl oz of tonic water (355g) has about 33g net carbs, 33g total carbs, and 124 calories.
