Peanut Butter Calories & Carbs
Last updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 2 tbsp (32g); per 100 g: 14g net carbs, 588 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 peanut butter?
Peanut Butter — 2 tbsp (32g) — has 4.5g net carbs: 6.4g total carbs minus 1.9g fiber, plus 8g protein, 16g fat, and 188 calories. Per 100g that is 14g net carbs (20g total carbs, 6g fiber) and 588 calories. That makes peanut butter moderate in net carbs and lower than the typical dairy food, which averages about 24.2g 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 100 g, sourced from USDA FoodData Central; net carbs are computed by CarbMeNot.
Is peanut butter keto-friendly?
Yes, peanut butter can fit a keto diet in moderate portions. 2 tbsp (32g) is 4.5g net carbs (6.4g total carbs − 1.9g fiber); per 100g that is 14g net carbs. On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other dairy foods and meals.
Keeping an eye on carbs in peanut butter?
Peanut Butter 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 |
|---|---|---|---|---|
| 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 — 2 tbsp (32g) — has 188 calories, with 8g protein, 16g fat, and 4.5g net carbs. Per 100g: 588 calories and 14g net carbs.
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 (2 tbsp, 32g) has 6.4g of total carbs and 4.5g of net carbs. Per 100 grams: 20g total, 14g net.
- How many net carbs are in peanut butter?
- Peanut Butter has 4.5g of net carbs per 2 tbsp (32g) — 6.4g total carbs minus 1.9g fiber.
- Is peanut butter keto-friendly?
- Yes, peanut butter can fit a keto diet in moderate portions. 2 tbsp (32g) is 4.5g net carbs (6.4g total carbs − 1.9g fiber); per 100g that is 14g net carbs. 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 peanut butter?
- Peanut Butter (2 tbsp, 32g) has 188 calories; that is 588 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.