A cup of whole strawberries contains roughly 46 to 50 calories, making them one of the lowest-calorie fruits you can eat. That’s about eight medium berries for fewer calories than a single tablespoon of peanut butter.
Calories by Serving Size
The exact count depends on how you measure and how big the berries are. The FDA lists eight medium strawberries (about 147 grams) at 50 calories. Mayo Clinic Health System puts a cup of eight medium berries at 45 calories. The small difference comes down to berry size and natural variation, but either way you’re looking at roughly 32 calories per 100 grams.
Here’s how that breaks down in practical terms:
- One large strawberry (about 25 grams): 8 calories
- One medium strawberry (about 18 grams): 6 calories
- One cup whole berries (about 144 grams): 46 calories
- One cup sliced berries (about 166 grams): 53 calories
These numbers are for fresh, raw strawberries with no added sugar. Frozen strawberries without added sweeteners have nearly identical calories. Strawberries packed in syrup or sugar can easily double or triple the count.
Why Strawberries Are So Low in Calories
Strawberries are roughly 91% water by weight. That high water content, combined with a modest sugar level (about 7 grams of natural sugar per cup), keeps the calorie density very low. For comparison, a cup of grapes has about 100 calories and a banana runs around 105. You can eat a large volume of strawberries for relatively few calories, which is one reason they show up so often in weight loss plans.
They also contain about 3 grams of fiber per cup. Fiber slows digestion and contributes to the feeling of fullness, so strawberries tend to be more satisfying than their calorie count might suggest.
How Strawberries Compare to Other Berries
Among common berries, strawberries consistently come in at or near the bottom for calories per cup:
- Strawberries: 46 calories per cup (144 g)
- Raspberries: 64 calories per cup (123 g)
- Blueberries: 84 calories per cup (148 g)
Blueberries pack nearly twice the calories per cup, mostly because they contain more sugar. Raspberries fall in the middle but bring significantly more fiber (about 8 grams per cup). All three are nutritious choices, but if your primary goal is keeping calories low while eating a generous portion, strawberries give you the most volume.
Nutritional Value Beyond Calories
What makes strawberries stand out isn’t just what they lack (calories) but what they deliver. Eight medium strawberries provide 160% of your daily recommended vitamin C intake. That’s more vitamin C per serving than an orange. They’re also a decent source of manganese, a mineral involved in bone health and metabolism, providing about 0.4 milligrams per serving.
The red pigment in strawberries comes from compounds called anthocyanins, which act as antioxidants. One clinical study found that regular strawberry consumption over a month reduced total cholesterol by about 9%, LDL (“bad”) cholesterol by nearly 14%, and triglycerides by about 21%. Participants also showed a significant increase in overall antioxidant capacity in their blood. These aren’t small shifts, and they came from eating whole strawberries rather than supplements.
Blood Sugar and Glycemic Impact
Strawberries have a glycemic index of 41, which puts them in the low-GI category (anything under 55 counts as low). This means they raise blood sugar gradually rather than causing a sharp spike. The combination of fiber, water content, and moderate sugar makes them one of the more blood-sugar-friendly fruits, even for people managing diabetes or watching their carbohydrate intake.
A full cup of strawberries contains about 12 grams of total carbohydrates, with 3 grams of that being fiber. The net carbohydrate impact is around 9 grams per cup, which is quite manageable even on lower-carb eating plans.
How Preparation Changes the Numbers
Fresh strawberries are the baseline, but how you eat them matters. A few common scenarios:
- Sliced with sugar: One tablespoon of granulated sugar adds 49 calories, more than doubling the calorie density of a small bowl.
- Strawberry jam: About 50 calories per tablespoon, with most of the fiber and vitamin C gone.
- Freeze-dried strawberries: Around 40 calories per 10-gram serving (roughly a quarter cup). The water is removed, so the calories are concentrated. It’s easy to eat much more by weight.
- Chocolate-dipped strawberries: Each large berry coated in chocolate runs about 50 to 70 calories, depending on chocolate thickness.
If you’re tracking calories, the simplest approach is to weigh your strawberries. At 32 calories per 100 grams, the math stays easy no matter how large or small the berries are.