What 57 kcal per 100g means

A 100-gram serving of blueberries is roughly a small bowlful or about 2/3 to 3/4 of a cup, depending on berry size. At 57 kcal, blueberries are energy-dense enough to satisfy a sweet craving without adding many calories.

For comparison, 100 grams is a more accurate tracking unit than “one handful,” because handfuls vary a lot. If you log foods from a photo or weigh them at home, 100 g is a practical benchmark to use.

Blueberry calories by common portion

Here are easy estimates based on 57 kcal per 100 g: 50 g blueberries is about 29 kcal, 75 g is about 43 kcal, and 100 g is 57 kcal. A typical 1-cup serving of raw blueberries is around 148 g, or about 84 kcal.

That means blueberries can fit into many calorie targets, whether you’re building a snack, adding fruit to yogurt, or using them as a dessert substitute. The biggest calorie jumps usually come from what you pair them with, like granola, honey, nut butter, or sweetened yogurt.

Nutrition beyond calories

Blueberries are not just low in calories. They also provide fiber, vitamin C, vitamin K, and helpful plant compounds called anthocyanins, which give blueberries their deep blue color. Fiber helps with fullness and can make a fruit portion feel more satisfying than a calorie count alone suggests.

Because blueberries are naturally sweet, they can work well when you want flavor without a big calorie load. That makes them useful for weight management, but also for general healthy eating if you’re trying to increase fruit intake.

How to track blueberries accurately

If you want the best calorie estimate, weigh blueberries in grams instead of guessing by volume. Raw and frozen unsweetened blueberries are very similar nutritionally, but sweetened dried blueberries are much higher in calories per gram because water has been removed and sugar is often added.

If you use a phone camera app to log meals or track workouts, consistency matters more than perfect precision. Fitnit can help on the fitness side by counting reps automatically and checking exercise form, which makes it easier to balance food intake with activity without overcomplicating your routine.

Tips

• Use 57 kcal per 100 g as your default tracking number for raw blueberries.
• Weigh blueberries once or twice at home so your eye can learn what 100 g looks like.
• Watch toppings: blueberries stay low-calorie, but yogurt, syrup, and granola can double or triple the total.
• Choose unsweetened frozen blueberries when fresh ones are expensive or out of season.
• For a simple snack, pair blueberries with protein, such as Greek yogurt or cottage cheese, to improve fullness.