Carbs in Reese's Peanut Butter Cup (1 Cup)
How many carbs are in reese's peanut butter cup (1 cup)?
Reese's Peanut Butter Cup (1 Cup) has 57.1g net carbs per 100g — 59.5g total carbs minus 2.4g fiber — plus 11.9g protein, 31g fat, and 500 calories. 1 cup (21g) works out to about 12g net carbs and 105 calories. That makes reese's peanut butter cup (1 cup) high in net carbs and higher than the typical dairy food, which averages about 24.2g net carbs per 100g. At this carb count, reese's peanut butter cup (1 cup) 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.
Keeping an eye on carbs in reese's peanut butter cup (1 cup)?
Reese's Peanut Butter Cup (1 Cup) runs higher in carbs, so portions matter. CarbMeNot tracks every gram from a photo, so you stay under your daily limit without the math.
Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is reese's peanut butter cup (1 cup) keto-friendly?
Reese's Peanut Butter Cup (1 Cup) is generally not keto-friendly. It has 57.1g net carbs per 100g (59.5g total carbs − 2.4g fiber). A typical serving — 1 cup (21g) — is about 12g 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 |
|---|---|---|---|---|
| 1 cup (21g) | 12g | 12.5g | 2.5g | 105 |
| 100 g (3.5 oz) | 57.1g | 59.5g | 11.9g | 500 |
| 1 oz (28 g) | 16g | 16.7g | 3.3g | 140 |
How many calories are in reese's peanut butter cup (1 cup)?
Reese's Peanut Butter Cup (1 Cup) has 500 calories per 100g. 1 cup (21g) has about 105 calories. That's alongside 11.9g protein, 31g fat, and 57.1g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 500 |
| Total carbs | 59.5g |
| Net carbs | 57.1g |
| Fiber | 2.4g |
| Sugar | 50g |
| Sugar alcohols | 0g |
| Protein | 11.9g |
| Fat | 31g |
| Sodium | 333mg |
| Potassium | 333mg |
Source: Manufacturer-reported values (snacks-sweets). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in reese's peanut butter cup (1 cup)?
- Reese's Peanut Butter Cup (1 Cup) has 59.5g of total carbs and 57.1g of net carbs per 100 grams.
- How many net carbs are in reese's peanut butter cup (1 cup)?
- Reese's Peanut Butter Cup (1 Cup) has 57.1g of net carbs per 100 grams (total carbs 59.5g minus 2.4g fiber).
- Is reese's peanut butter cup (1 cup) keto-friendly?
- Reese's Peanut Butter Cup (1 Cup) is generally not keto-friendly. It has 57.1g net carbs per 100g (59.5g total carbs − 2.4g fiber). A typical serving — 1 cup (21g) — is about 12g 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 reese's peanut butter cup (1 cup)?
- Reese's Peanut Butter Cup (1 Cup) has 500 calories per 100 grams.
- How many carbs are in 1 cup (21g) of reese's peanut butter cup (1 cup)?
- 1 cup (21g) of reese's peanut butter cup (1 cup) (21g) has about 12g net carbs, 12.5g total carbs, and 105 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.