Calories in a Potato: By Size and Cooking Method
A medium baked potato (173 g, flesh and skin) provides approximately 161 calories — making it a moderate-calorie, high-carbohydrate whole food, per USDA FoodData Central (FDC ID 170030).
The catch: calories climb fast with size and preparation method. A large restaurant potato can weigh 350 g or more before any toppings, and frying nearly triples the calorie density. Understanding these differences is what separates mindful eating from guessing.
Calories by Size and Cooking Method
| Preparation | Serving | Calories | Carbs (g) | Protein (g) | Fat (g) |
|---|---|---|---|---|---|
| Baked (flesh + skin) | Small (138 g) | 128 | 29 | 3.4 | 0.1 |
| Baked (flesh + skin) | Medium (173 g) | 161 | 36 | 4.3 | 0.2 |
| Baked (flesh + skin) | Large (299 g) | 278 | 63 | 7.5 | 0.3 |
| Boiled, no skin | 1 cup, diced (150 g) | 116 | 26 | 2.5 | 0.1 |
| Mashed (with milk, no butter) | 1 cup (210 g) | 174 | 37 | 4.5 | 1.0 |
| French fries (fast food) | Medium serving (117 g) | 365 | 48 | 4.0 | 17 |
| Hash browns (pan-fried) | 1 patty (70 g) | 147 | 17 | 2.0 | 8.2 |
Sources: USDA FoodData Central; fast-food values from standard nutrient databases.
Macros at a Glance
Potatoes are almost entirely carbohydrate and water. A medium baked potato delivers roughly 36 g of carbs, nearly all as starch with 3.8 g of dietary fiber — important for satiety and gut health. Protein is modest at 4.3 g, and fat is negligible unless you add butter, oil, or cheese.
The fiber content matters for blood sugar: the skin alone adds around 2 g, which slows digestion enough to meaningfully lower the glycemic impact compared to peeled versions. Cooling cooked potatoes further increases resistant starch, reducing available carbohydrates.
Does It Fit Your Goals?
Weight loss. A plain medium baked potato at 161 calories is filling relative to its calorie cost — largely because of its water content and fiber. Studies consistently rank boiled potatoes at the top of satiety indexes. The problem is almost never the potato; it is the toppings (sour cream, butter, bacon) that can add 200-400 extra calories. Pair it with a lean protein source and it becomes a solid, calorie-efficient meal anchor. Use the TDEE calculator to check whether a potato-based meal fits your daily budget.
Blood sugar management. Plain white potatoes carry a high glycemic index (GI around 78 boiled, higher baked), which matters for people managing type 2 diabetes or prediabetes. Portion control, cooling, and pairing with protein or fat are the three most reliable strategies to reduce the glycemic load per meal. The glycemic load calculator lets you enter the exact serving size and get a per-meal load score rather than relying on GI alone. For broader context on how potato carbs fit a daily target, see our guide on counting calories to lose weight.
Muscle building. Potatoes are an underrated carb source for athletes — cheap, easy to digest, and potassium-rich (around 926 mg per medium potato), supporting muscle function and fluid balance. They are low in fat, so they leave room in a high-protein diet without crowding out calories from other sources.
Bottom Line
Plain potatoes are a nutritionally solid whole food — the calorie story changes dramatically based on size and what you do to them. A medium baked potato at 161 calories sits well within most daily budgets; a fast-food medium fry at 365 calories does not offer the same fiber or satiety return.
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Frequently asked questions
- How many calories are in a medium baked potato?
- A medium baked potato (173 g, flesh and skin) contains about 161 calories, 36 g carbohydrate, 4.3 g protein, and under 0.2 g fat, per USDA FoodData Central (FDC ID 170030).
- Do potatoes cause blood sugar spikes?
- Plain boiled potatoes have a moderate glycemic index (around 78 for white, boiled), but cooling them after cooking raises resistant starch content and lowers the glycemic response. Adding protein or fat — e.g., Greek yogurt instead of butter — also blunts the spike.
- Are potato calories different raw vs cooked?
- Yes. Raw potato loses water during cooking, concentrating calories per gram. A 100 g raw potato is roughly 77 calories, while 100 g of baked potato (denser after moisture loss) is about 93 calories. Always log the cooked weight when possible.