One 100 g serving of carambola, (starfruit), raw has 31 calories, 6.7 g of carbs, and 2.8 g of fiber.
Full macro and micronutrient breakdown, plus how this compares across diets, is on the Carambola, (starfruit), raw nutrition facts page.
Source: USDA FoodData Central - SR Legacy (2018-04)