According to FatSecret.com, a whole-wheat bagel contains 61.33 grams of carbohydrate. It is composed of 81 percent carbohydrate, 15 percent protein and 4 percent fat. At 300 calories, the bagel constitutes 15 percent of the recommended daily intake of food energy, based on a recommended daily intake of 2,000 calories.
A whole-wheat bagel provides 21 percent of the recommended daily intake of iron, the site notes. It also includes 2 percent of the recommended daily intake of calcium.
Sparkpeople.com notes that a Thomas-brand whole-wheat bagel contains 55 grams of carbohydrate. A Lender's brand whole-wheat bagel also contains 55 grams of carbohydrate, while a Pepperidge Farm whole-wheat bagel contains 49 grams of carbohydrate.