Carbs in Peanut Butter
How many carbs are in peanut butter?
Peanut Butter has 14g net carbs per 100g — 20g total carbs minus 6g fiber — plus 25g protein, 50g fat, and 588 calories. 2 tbsp (32g) works out to about 4.5g net carbs and 188 calories. That makes peanut butter moderate in net carbs and lower than the typical dairy food, which averages about 24.3g net carbs per 100g. At this carb count, peanut butter is best limited to small portions on keto (usually 20–50g net carbs per day). 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 peanut butter keto-friendly?
Peanut Butter is borderline for keto — it works only in small portions. It has 14g net carbs per 100g (20g total carbs − 6g fiber). A typical serving — 2 tbsp (32g) — is about 4.5g 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.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 2 tbsp | 4.5g | 6.4g | 8g | 188 |
| 100 g (3.5 oz) | 14g | 20g | 25g | 588 |
| 1 oz (28 g) | 3.9g | 5.6g | 7g | 165 |
How many calories are in peanut butter?
Peanut Butter has 588 calories per 100g. 2 tbsp (32g) has about 188 calories. That's alongside 25g protein, 50g fat, and 14g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 588 |
| Total carbs | 20g |
| Net carbs | 14g |
| Fiber | 6g |
| Sugar | 9g |
| Sugar alcohols | 0g |
| Protein | 25g |
| Fat | 50g |
| Sodium | 17mg |
| Potassium | 649mg |
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 peanut butter?
- Peanut Butter has 20g of total carbs and 14g of net carbs per 100 grams.
- How many net carbs are in peanut butter?
- Peanut Butter has 14g of net carbs per 100 grams (total carbs 20g minus 6g fiber).
- Is peanut butter keto-friendly?
- Peanut Butter is borderline for keto — it works only in small portions. It has 14g net carbs per 100g (20g total carbs − 6g fiber). A typical serving — 2 tbsp (32g) — is about 4.5g 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 peanut butter?
- Peanut Butter has 588 calories per 100 grams.
- How many carbs are in 2 tbsp of peanut butter?
- 2 tbsp of peanut butter (32g) has about 4.5g net carbs, 6.4g total carbs, and 188 calories.
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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.