Tonic Calories & Carbs
Last updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 1 can (12 fl oz), 355g; per 100 g: 10.1g net carbs, 39 cal. Net carbs = total carbs − fiber − sugar alcohols — do the math for any label with the free net carbs calculator.
How many carbs are in tonic?
Tonic — 1 can (12 fl oz), 355g — has 35.9g net carbs: 35.9g total carbs minus 0g fiber, plus 0g protein, 0g fat, and 138 calories. Per 100g that is 10.1g net carbs (10.1g total carbs, 0g fiber) and 39 calories. That makes tonic moderate in net carbs and lower than the typical drink, which averages about 21.1g net carbs per 100g. At this carb count, tonic is best limited to small portions on keto (usually 20–50g net carbs per day). Values are per 100 g, sourced from Open Food Facts; net carbs are computed by CarbMeNot.
Is tonic keto-friendly?
Tonic is generally not keto-friendly. 1 can (12 fl oz), 355g is 35.9g net carbs (35.9g total carbs − 0g fiber); per 100g that is 10.1g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
Keeping an eye on carbs in tonic?
Tonic runs higher in carbs, so portions matter. CarbMeNot tracks every gram from a photo, so you stay under your daily limit without the math.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 can (12 fl oz) | 35.9g | 35.9g | 0g | 138 |
| 100 g (3.5 oz) | 10.1g | 10.1g | 0g | 39 |
| 1 oz (28 g) | 2.8g | 2.8g | 0g | 11 |
How many calories are in tonic?
Tonic — 1 can (12 fl oz), 355g — has 138 calories, with 0g protein, 0g fat, and 35.9g net carbs. Per 100g: 39 calories and 10.1g net carbs.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 39 |
| Total carbs | 10.1g |
| Net carbs | 10.1g |
| Fiber | 0g |
| Sugar | 9.9g |
| Sugar alcohols | 0g |
| Protein | 0g |
| Fat | 0g |
| Sodium | 14mg |
| Potassium | 0mg |
Source: Open Food Facts (Canada Dry). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in tonic?
- Tonic (1 can (12 fl oz), 355g) has 35.9g of total carbs and 35.9g of net carbs. Per 100 grams: 10.1g total, 10.1g net.
- How many net carbs are in tonic?
- Tonic has 35.9g of net carbs per 1 can (12 fl oz), 355g — 35.9g total carbs minus 0g fiber.
- Is tonic keto-friendly?
- Tonic is generally not keto-friendly. 1 can (12 fl oz), 355g is 35.9g net carbs (35.9g total carbs − 0g fiber); per 100g that is 10.1g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
- How many calories are in tonic?
- Tonic (1 can (12 fl oz), 355g) has 138 calories; that is 39 calories per 100 grams.
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CarbMeNot provides general nutrition information, not medical advice. Values are estimates — verify before relying on them for any health decision. See our Medical Disclaimer.