Calories in Beef, top sirloin, steak, separable lean and fat, trimmed to 1/8" fat, choice, cooked, pan-fried
Calorie is a unit of measurement for energy.
One calorie is formally defined as the amount of energy required to raise one cubic centimeter of water by one degree centigrade. We use kcal (1,000 calories) to measure the amount of energy in food.
Nutrition Facts for 100g
Daily values based in a diet 2,000 kcal
We need an average of 2,000 calories per day to maintain body functions. 100 grams of Beef, top sirloin, steak, separable lean and fat, trimmed to 1/8" fat, choice, cooked, pan-fried have 313 calories, the 16% of your total daily calorie needs.
The Basal Metabolic Rate is the amount of energy you need while resting in a temperature environment when your digestive system is inactive. In such a state, your energy will be used to maintain your vital organs. The BMR decreases with age and increases with muscle mass.