Nutrition
One medium orange weighing 131 g provides:

61.6 calories
0.16 g of fat
237 milligrams of potassium
15.4 g of carbohydrate
12.2 g of sugar
1.23 g of protein
The same orange provides the following percentages of a person’s daily requirement of several essential vitamins and minerals, according to United States Department of Agriculture guidelines:

Nutrient Percentage of daily requirement for adults

Vitamin C 92.93% for females and 77.44% for males
Thiamin 10.36%
Folate 9.83%
Fiber At least 9.34%, depending on age and sex
Calcium Between 4.36% and 5.24%, depending on age
Potassium 5.04%