Carbs in Mashed Potatoes
How many carbs are in mashed potatoes?
Mashed Potatoes has 15.3g net carbs per 100g — 16.7g total carbs minus 1.4g fiber — plus 1.9g protein, 4.3g fat, and 113 calories. 1 cup (prepared with milk and butter) works out to about 32.1g net carbs and 237 calories. That makes mashed potatoes moderate in net carbs and about average for the typical vegetable, which averages about 18.3g net carbs per 100g. At this carb count, mashed potatoes 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.
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Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is mashed potatoes keto-friendly?
Mashed Potatoes is borderline for keto — it works only in small portions. It has 15.3g net carbs per 100g (16.7g total carbs − 1.4g fiber). A typical serving — 1 cup (prepared with milk and butter) — is about 32.1g 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.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 cup (prepared with milk and butter) | 32.1g | 35.1g | 4g | 237 |
| 100 g (3.5 oz) | 15.3g | 16.7g | 1.9g | 113 |
| 1 oz (28 g) | 4.3g | 4.7g | 0.5g | 32 |
How many calories are in mashed potatoes?
Mashed Potatoes has 113 calories per 100g. 1 cup (prepared with milk and butter) has about 237 calories. That's alongside 1.9g protein, 4.3g fat, and 15.3g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 113 |
| Total carbs | 16.7g |
| Net carbs | 15.3g |
| Fiber | 1.4g |
| Sugar | 1.4g |
| Sugar alcohols | 0g |
| Protein | 1.9g |
| Fat | 4.3g |
| Sodium | 317mg |
| Potassium | 286mg |
Source: Manufacturer-reported values (vegetables). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in mashed potatoes?
- Mashed Potatoes has 16.7g of total carbs and 15.3g of net carbs per 100 grams.
- How many net carbs are in mashed potatoes?
- Mashed Potatoes has 15.3g of net carbs per 100 grams (total carbs 16.7g minus 1.4g fiber).
- Is mashed potatoes keto-friendly?
- Mashed Potatoes is borderline for keto — it works only in small portions. It has 15.3g net carbs per 100g (16.7g total carbs − 1.4g fiber). A typical serving — 1 cup (prepared with milk and butter) — is about 32.1g 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 mashed potatoes?
- Mashed Potatoes has 113 calories per 100 grams.
- How many carbs are in 1 cup (prepared with milk and butter) of mashed potatoes?
- 1 cup (prepared with milk and butter) of mashed potatoes (210g) has about 32.1g net carbs, 35.1g total carbs, and 237 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.