How many calories are in algae?

The caloric content of algae varies depending on the type and preparation method, but on average, dried algae can contain anywhere from 200 to 400 calories per 100 grams. For example, spirulina, a popular type of blue-green algae, has approximately 290 calories per 100 grams. Algae are also nutrient-dense, providing protein, vitamins, and minerals along with their calories. However, their low volume consumption typically results in a relatively low caloric intake.