Topmusicanswers
- How does the Atwater system work?
- What is the Atwater equation?
- How do you calculate calorific value of food?
- How accurate is Atwater system?
How does the Atwater system work?
The Atwater system uses the average values of 4 Kcal/g for protein, 4 Kcal/g for carbohydrate, and 9 Kcal/g for fat. Alcohol is calculated at 7 Kcal/g. (These numbers were originally determined by burning and then averaging.)
What is the Atwater equation?
Calculated with modified Atwater equation (AAFCO, 1997): ME (kcal/kg) = 10 × (3.5 × Crude Protein % + 8.5 × Crude Fat % + 3.5 × Nitrogen-Free Extract %).
How do you calculate calorific value of food?
To calculate this, divide a food or drink's calories from fat by total calories (this information is on the product's food label) and then multiply by 100. For example, if a 300-calorie food has 60 calories from fat, divide 60 by 300 and then multiply by 100.
How accurate is Atwater system?
The difference between ME calculated by using Atwater and similar factors and determined ME values was up to 4% for the refined diet and up to 11% for the low-fat, high-fiber diets. Various factorial and empirical systems for calculating food energy failed to reflect the results of the direct determinations.
