By Dr. Rachel Kim · Published March 15, 2025 · 6 min read
So, how many calories in a potato? A medium boiled potato contains around 144 calories. A medium baked potato with skin delivers about 164 calories. The numbers shift significantly depending on size, variety, and — most dramatically — how you prepare it. This guide breaks down calorie counts for every common cooking method, sourced directly from USDA FoodData Central.
Potato Calories by Cooking Method
The preparation method is the single biggest variable in potato calories. Plain potatoes are low in fat; cooking methods that add oil or butter multiply the calorie count fast.
| Preparation | Calories per 100g | Medium Serving | Notes |
|---|---|---|---|
| Raw (flesh + skin) | 77 kcal | 164 kcal (213g) | Baseline density |
| Boiled (no skin) | 86 kcal | 144 kcal (167g) | Water absorbed, total cals similar |
| Baked russet (with skin) | 95 kcal | 164 kcal (173g) | Moisture drives off |
| Mashed (milk only) | 83 kcal | 174 kcal (1 cup) | Milk adds minimal cals |
| Mashed (milk + butter) | 113 kcal | 237 kcal (1 cup) | +30 kcal from ~4g fat |
| Oven-baked fries (frozen) | 158 kcal | ~200 kcal | Far lower than deep-fried |
| Hash browns (home-prepared) | 265 kcal | ~265 kcal (100g) | Pan-frying adds significant fat |
| Fast food french fries | 312 kcal | ~365 kcal (117g) | 3.5x more than boiled |
ℹ️ Why Per-100g Numbers Can Mislead
A baked potato looks higher in calories per 100g than a boiled one — but that is because baking drives off water, concentrating the potato's mass. The total calories in the original potato are essentially unchanged. What truly adds calories is fat: butter, oil, and frying.
Full Nutrition Profile of a Medium Baked Potato
Calories tell only part of the story. A medium baked russet potato with skin (173g) delivers an impressive micronutrient package alongside its macros, based on USDA FoodData Central data:
| Nutrient | Amount | % Daily Value |
|---|---|---|
| Calories | 164 kcal | — |
| Carbohydrates | 37g | 13% |
| Fiber | 4g | 14% |
| Protein | 4.5g | 9% |
| Fat | 0.2g | 0% |
| Potassium | 926 mg | 20% |
| Vitamin C | 28 mg | 31% |
| Vitamin B6 | 0.7 mg | 41% |
| Iron | 3.2 mg | 18% |
A single medium potato delivers more potassium than a banana (approximately 422 mg) and over 30% of your daily Vitamin C. Eat the skin: it contains roughly half the potato's total fiber and a significantly higher concentration of micronutrients than the flesh alone.
Does Cooking Change the Calories?
Cooking itself does not create or destroy calories. What changes is moisture content — and, far more importantly, what you add.
- Boiling absorbs water, lowering calorie density per 100g while leaving total calories essentially unchanged.
- Baking drives out moisture, concentrating calories slightly per gram. The difference between a boiled and baked potato per 100g is roughly 9 kcal — this is water loss, not energy gain.
- Frying is where the real transformation happens. Fast food fries absorb cooking oil to reach 312 kcal/100g — more than three times the density of a boiled potato.
- Toppings at the table are often the hidden driver at home. A tablespoon of butter adds ~102 calories; a tablespoon of sour cream adds ~28 calories. A plain baked potato climbs past 400 calories fast once the toppings appear.
For a deeper look at how preparation affects the energy content of everyday foods, read our guide on hidden calories in food.
White Potato vs. Sweet Potato
White potatoes and sweet potatoes are nutritionally closer than most people expect.
| Attribute | White Potato (raw, per 100g) | Sweet Potato (raw, per 100g) |
|---|---|---|
| Calories | 77 kcal | 86 kcal |
| Carbohydrates | 17.5g | 20.1g |
| Fiber | 2.1g | 3.0g |
| Protein | 2.1g | 1.6g |
| Vitamin C | 19.7mg (22% DV) | 2.4mg (3% DV) |
| Vitamin A (beta-carotene) | Trace | 961 mcg (107% DV) |
| Potassium | 425 mg | 337 mg |
Sweet potatoes lead on fiber and beta-carotene. White potatoes lead on Vitamin C, potassium, and protein. The calorie gap is small — 9 kcal per 100g raw. For a detailed breakdown of the sweeter variety, see our article on how many calories in a sweet potato.
Are Potatoes Good for Weight Loss?
Plain potatoes are one of the most filling foods you can eat. A landmark satiety study by Holt et al., published in the European Journal of Clinical Nutrition, tested 38 common foods and found that boiled potatoes ranked number one with a satiety index of 323 — more than double white bread (100) and far above pasta (119) and white rice (138).
Potatoes also contain resistant starch, which forms when cooked potatoes are cooled. Resistant starch acts as a prebiotic fiber that feeds beneficial gut bacteria and moderates the blood glucose response. Research published in Nutrients found that chilled potatoes produced a significantly lower postprandial glucose response compared to freshly cooked ones.
The "fattening potato" reputation comes almost entirely from preparation, not the food itself. To understand how calorie density fits into a weight management approach, read our guide on calories and weight loss.
If you want to see how your potato dishes fit into your daily targets, Caloria can estimate calories from a photo in seconds — no manual logging needed.
⚠️ Medical Disclaimer
This article is for informational purposes only and does not constitute medical advice. If you manage a condition such as diabetes that requires careful carbohydrate monitoring, consult a registered dietitian before making significant dietary changes.
Frequently Asked Questions
How many calories are in a medium baked potato?
A medium baked russet potato with skin (about 173g) contains roughly 164 calories, 37g of carbs, 4.5g of protein, and 4g of fiber. Without the skin, the count drops to around 121 calories — the skin holds a meaningful share of both the calories and the nutrition.
Does boiling a potato reduce calories?
No. Boiling does not destroy calories. The lower per-100g figure for boiled potatoes (86 kcal vs. 95 kcal baked) reflects water absorption during cooking, which increases the potato's weight without adding energy. The total calorie content of the potato itself stays essentially unchanged. What reduces total calories in a potato dish is using less added fat.
How many calories in a sweet potato vs. white potato?
They are nearly identical: sweet potato has about 86 kcal per 100g raw, white potato about 77 kcal. The more meaningful nutritional difference is in micronutrients — sweet potatoes provide far more Vitamin A (beta-carotene), while white potatoes deliver more Vitamin C and potassium. To understand how these calories fit into your daily intake, see our article on how to calculate food calories.
Are potatoes fattening?
A plain boiled or baked potato is not fattening. The calorie multiplication happens with preparation: frying multiplies calorie density by 3.5x, and common toppings like butter and sour cream add 30–100 calories per tablespoon. Understanding how calorie balance works overall is covered in our guide to what calories are.
How many calories in french fries?
Fast food french fries contain around 312 kcal per 100g, compared to 86 kcal for a boiled potato. A medium serving at most fast food chains delivers approximately 365 calories, largely from the cooking oil absorbed during frying. Oven-baked frozen fries are a substantially lighter option at around 158 kcal per 100g.
Track What's on Your Plate
A potato can be 144 calories or over 365 calories — same food, very different outcomes depending on cooking and toppings. Knowing the numbers is the first step; tracking them consistently is what drives real results.
Download Caloria and see exactly what you are eating: