Carbs in Butter
Keto-friendlyHow many carbs are in butter?
Butter has 0.1g net carbs per 100g — 0.1g total carbs minus 0g fiber — plus 0.8g protein, 81.1g fat, and 717 calories. That makes butter very low in net carbs and lower than the typical dairy food, which averages about 24.3g net carbs per 100g. With this carb count, butter fits a keto or low-carb diet (usually 20–50g net carbs per day) in normal portions. Values are per per 100 g, sourced from USDA FoodData Central; net carbs are computed by CarbMeNot.
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Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is butter keto-friendly?
Yes — butter is keto-friendly. It has 0.1g net carbs per 100g (0.1g total carbs − 0g fiber). On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other dairy foods and meals.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 100 g (3.5 oz) | 0.1g | 0.1g | 0.8g | 717 |
| 1 oz (28 g) | 0g | 0g | 0.2g | 201 |
How many calories are in butter?
Butter has 717 calories per 100g. That's alongside 0.8g protein, 81.1g fat, and 0.1g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 717 |
| Total carbs | 0.1g |
| Net carbs | 0.1g |
| Fiber | 0g |
| Sugar | 0.1g |
| Sugar alcohols | 0g |
| Protein | 0.8g |
| Fat | 81.1g |
| Sodium | 643mg |
| Potassium | 24mg |
Source: USDA FoodData Central (SR Legacy). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in butter?
- Butter has 0.1g of total carbs and 0.1g of net carbs per 100 grams.
- How many net carbs are in butter?
- Butter has 0.1g of net carbs per 100 grams (total carbs 0.1g minus 0g fiber).
- Is butter keto-friendly?
- Yes — butter is keto-friendly. It has 0.1g net carbs per 100g (0.1g total carbs − 0g fiber). On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other dairy foods and meals.
- How many calories are in butter?
- Butter has 717 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.