One 100 g serving of chick-fil-a, chicken sandwich has 249 calories, 20.9 g of carbs, and 1.4 g of fiber.
Full macro and micronutrient breakdown, plus how this compares across diets, is on the CHICK-FIL-A, chicken sandwich nutrition facts page.
Source: USDA FoodData Central - SR Legacy (2018-04)