An orange weighs 2 to 10 ounces, including seeds and peel, depending on its size and variety. Most commercially grown oranges from common and navel varieties weigh 5 to 6 ounces. Smaller oranges, such as mandarins, typically weigh 2 to 3 ounces each.
One medium-sized orange contains approximately 80 calories, 19 grams of carbohydrates, 3 grams of dietary fiber, 14 grams of sugar and 1 gram of protein. Navel oranges, which are seedless and have a thicker peel, are commonly sold for fresh eating, while most Valencia oranges, which have a thin peel, are sold for juicing. The smallest oranges, including Satsumas and clementines, are sold for snacking. Hybrids, such as the Cara Cara and blood oranges, are often used in salads, dressings, sauces and smoothies.