The calories in a glass of fresh fruit juice vary according to the type of fruit and serving size; however, an 8-ounce glass of fruit juice averages between 112 and 154 calories. Some fruits contain higher amounts of natural sugar than others, which in turn influences caloric content. A standard 8-ounce serving of orange juice provides 112 calories, while a serving of apple juice contains 120 calories; 8 ounces of pineapple juice contains 140 calories, while 8 ounces of grape juice yields 154 calories.
For those watching their sugar or caloric intake, consuming fresh fruit instead of fruit in juice form makes a healthier option. Fresh pieces of fruit generally contain less sugar than juice and provide more nutrients and fiber.
For example, an 8-ounce glass of orange juice contains 112 calories and over 20 grams of sugar, while an orange yields 9 grams of sugar and just 45 calories. Fresh fruit juice contains approximately the same amount of vitamins as fresh fruit, but concentrates amounts of fruits' natural sugars.
Many companies add additional sugar to fruit juices, making calories add up quickly. According to the Center for Disease Control, 12 ounces of sweetened apple juice and orange juice yields 192 and 168 calories, respectively; those numbers increase to 300 calories and 280 calories for 20 ounces of apple and orange juices.