A medium baked sweet potato has about 103 calories, while 100 grams of baked sweet potato has about 90 calories, according to USDA FoodData Central. For anyone comparing foods by the numbers, the calories in sweet potato come with one of the best nutrient returns of any starchy vegetable, packing vitamin A, fiber, potassium, and vitamin C into a naturally sweet, satisfying package.
When people search for the calories in sweet potato, they are usually comparing it with a white potato or trying to fit it into a weight loss plan. Sweet potatoes are not exactly low calorie, but they are remarkably filling for their calorie count, thanks to fiber and water content. A medium one covers roughly 5 percent of a 2,000 calorie daily diet, yet delivers more than four times your daily vitamin A needs.
Below are exact calorie numbers for every common size and cooking method, plus the full nutrition breakdown.
How Many Calories Are in a Sweet Potato?
A sweet potato’s calorie count depends almost entirely on its size, ranging from about 54 calories for a small one to about 162 calories for a large one. Because the calorie density is steady at roughly 90 calories per 100 grams when baked, you can estimate any portion by weighing it and multiplying by 0.9.
| Serving size | Weight | Calories |
|---|---|---|
| Small | 60 g | 54 |
| Medium | 114 g | 103 |
| Large | 180 g | 162 |
The medium 114 gram serving is the USDA’s standard reference size, and at about 103 calories it fits comfortably into almost any meal plan, including calorie controlled diets. Restaurant portions often run larger, so the calories in sweet potato dishes from a restaurant can be double the numbers above before toppings are even added.
To see how a 103 calorie sweet potato fits your personal daily target, try the free [Calorie Calculator](https://calcunexa.com/calorie-calculator/){:target=”_blank”}, which adjusts for your age, weight, and activity level.
Do Calories Change With the Cooking Method?
Yes. The same sweet potato can go from about 76 calories to almost 200 calories per 100 grams depending on how you cook it. Water based methods like boiling and steaming keep the count lowest because no fat is added and some starch leaches into the water. Frying does the opposite, since the potato absorbs a significant amount of oil.
| Cooking method | Calories per 100 g | Why it changes |
|---|---|---|
| Boiled | 76 | Water replaces some starch, no added fat |
| Steamed | 80 | Gentle cooking with no oil |
| Baked | 90 | Moisture loss concentrates the natural sugars |
| Mashed with butter | 120 | Butter adds about 30 calories per 100 g |
| Fried | 192 | Oil absorption more than doubles the count |
Baking is the most popular method, and the one behind the 103 calorie medium sweet potato figure. If you love the caramelized flavor of a baked sweet potato but want to trim calories, boiling is the simplest swap: you save about 15 percent per portion with almost no change in the core nutrition. The takeaway is that the calories in sweet potato can look very different from one recipe to another, even when the potato itself never changes.
Sweet Potato vs White Potato: Which Has Fewer Calories?
Neither wins by much on calories alone: the calories in sweet potato and in white potato are nearly identical at 90 versus 93 per 100 grams baked, so the calorie difference is almost meaningless. Where the sweet potato pulls ahead is nutrition per calorie, especially vitamin A and fiber.
| Nutrient (per 100 g, baked) | Sweet potato | White potato |
|---|---|---|
| Calories | 90 | 93 |
| Fiber | 3.3 g | 2.2 g |
| Vitamin A | 438% DV | Less than 1% DV |
| Vitamin C | 25 mg | 12 mg |
| Potassium | 337 mg | 421 mg |
| Carbohydrates | 20.7 g | 21 g |
The sweet potato’s deep orange flesh comes from beta carotene, which the body converts into vitamin A. A white potato has almost none of it. The white potato does have a small edge in potassium, but both are solid sources. When it comes to calories in sweet potato versus white potato, preparation matters far more than the choice of potato: a plain boiled sweet potato at 76 calories per 100 grams beats a butter loaded baked white potato every time. A quick check on the [BMI Calculator](https://calcunexa.com/bmi-calculator/){:target=”_blank”} can help you match portions to your goals.
What Nutrition Comes With Those Calories?
A medium sweet potato delivers more than 400 percent of your daily vitamin A needs, and that is the standout feature of its nutrition profile. Vitamin A supports healthy vision, immune function, and skin health, and the sweet potato is one of the richest natural sources on the planet. Beyond that headline number, the calories in sweet potato come bundled with a genuinely impressive mix of nutrients.
Fiber is the second big win. One medium sweet potato provides about 4 grams of fiber, which slows digestion, steadies blood sugar, and keeps you full longer than the same calories from a refined food. That satiety effect is a large part of why sweet potatoes work so well in weight loss diets: people naturally eat less afterward.
Potassium comes in at roughly 540 mg per medium potato, supporting healthy blood pressure and fluid balance. Vitamin C adds about 22 to 25 mg, which helps iron absorption and immune defense, though some is lost to heat during cooking. You also get meaningful amounts of manganese, vitamin B6, and pantothenic acid, plus antioxidants like anthocyanins in purple varieties. Very few foods deliver this much vitamin A and fiber at 103 calories, and the natural sweetness means most people eat sweet potato without added sugar or heavy sauces.
Frequently Asked Questions
How many calories are in one whole sweet potato?
A whole sweet potato has between 54 and 162 calories depending on its size, with a medium 114 gram potato at about 103 calories. These numbers assume plain cooking with no added fat; weighing your potato and using 90 calories per 100 grams gives the most accurate estimate.
Are sweet potatoes good for weight loss?
Yes, they can be. At 103 calories, a medium sweet potato is filling enough to work as a meal base, and its 4 grams of fiber slow digestion and reduce later snacking. Knowing the calories in sweet potato by cooking method is the key: boiled, steamed, or baked with no added fat keeps them diet friendly, while frying or loading them with butter and marshmallows can triple the count.
Do sweet potatoes have more calories than regular potatoes?
No. Per 100 grams baked, a sweet potato has about 90 calories and a white potato about 93, so they are essentially equal. The sweet potato is the better nutritional pick for most people because of its much higher vitamin A and fiber content.
How many calories are in a sweet potato without the skin?
The calories in sweet potato stay nearly identical when you peel one, saving roughly 5 to 10 calories on a medium potato. The skin holds a good share of the fiber, though, so peeling makes a 103 calorie sweet potato slightly less filling without much calorie benefit. Eating the skin also adds a small amount of extra potassium.
Is a baked sweet potato healthier than a boiled one?
Boiled wins slightly on calories at 76 versus 90 per 100 grams, and boiling lowers the glycemic index, which helps blood sugar control. Baking concentrates the flavor and keeps a little more of some nutrients, but some vitamin C is lost to the higher heat. Both are excellent choices; pick the method you enjoy most, since consistency beats small differences.
Can people with diabetes eat sweet potatoes?
In reasonable portions, yes. The calories in sweet potato fit comfortably into a diabetes friendly plan, especially when boiled, which gives it a lower glycemic index than the baked version. Pairing it with protein or healthy fat further slows glucose absorption. As always, portion size matters, and anyone managing diabetes should check with their dietitian about their personal plan.
Conclusion
The calories in sweet potato tell a simple story: about 103 for a medium baked potato, 90 per 100 grams, and 54 to 162 across common sizes. Cooking method is the real variable, with frying nearly tripling the count and boiling cutting it to the lowest level. Compared with a white potato, the calorie count is a tie, but the sweet potato wins decisively on vitamin A and fiber per calorie.
If you want to verify the raw nutrient numbers yourself, the USDA’s [FoodData Central](https://fdc.nal.usda.gov/){:rel=”nofollow noopener”} database publishes the full laboratory analysis for sweet potatoes in every preparation. For practical advice on fitting starchy vegetables into balanced meals, the registered dietitians at [EatRight.org](https://www.eatright.org/){:rel=”nofollow noopener”} offer portion guidance built around real eating patterns. At roughly 103 calories with exceptional nutrition, the sweet potato earns its reputation as one of the smartest carbs you can put on your plate.