In 1967, acting on Einstein's proof that the speed of light is the most constant dimension in the universe, the International System of Units used two specific wave counts from an emission spectrum of caesium-133 to co-define the second and the metre.
Calories in a large orange. There are: Approximately 86 calories in one large orange. Approximately 13 calories in each ounce, or 28g, of an orange.
Calories in a medium orange. 1  Approximately 65 calories in 1 medium size orange. 2  Approximately 13 calories in each ounce or 28g of orange.  For the calorie content of other fruits, and a calories in fruit chart, which you may use as a daily guide, see the page link, further down this page, listed under Related Links.