Tortillas. Carbohydrates in tortillas vary slightly, depending on if you have a flour or corn tortilla. You get approximately 14.5 grams of carbohydrates from a medium 6-inch flour tortilla or 14 grams from a similar size corn tortilla. A medium 6-inch flour tortilla has a total of about 90 calories and nearly 70 percent of the calories come from carbohydrates.