Multiply grams of carbohydrate in the food by 4 calories per gram. A calorie is a unit of how much energy is in a given amount of food, also called a kcal. . Multiply grams of protein in the food by 4 calories per gram. . Multiply grams of fat in the food by 9 calories per gram.
How is energy measured in animal feed?
Gross energy (GE) is the total amount of chemical energy in the diet consumed. It is also known as the heat of combustion. GE content of feed is measured as heat liberated during complete burning (oxidation) of the feed sample and is determined by an apparatus called a bomb calorimeter.
How do you calculate total energy per serve?
Therefore, the total energy of one serving of the food is calculated by adding together the energy provided by the protein, total fat, carbohydrate and dietary fibre.
How do you calculate the energy content of dog food?
1STEP 1: CALCULATE GE. GE (kcal) = (5.7 x % protein) + (9.4 x % fat) + [4.1 x (% NFE + % crude fibre)] ... 2STEP 2: CALCULATE ENERGY DIGESTIBILITY (%) Dogs: % Energy Digestibility = 91.2 – (1.43 x % crude fibre in DM) ... 3STEP 4: CALCULATE METABOLISABLE ENERGY. Dogs: kcal ME = kcal DE – (1.04 x % crude protein)
How do you calculate percentage of energy from protein?
The result is the percentage of calories in your diet that day that came from protein. For example, if you ate a total of 2,000 calories and 700 of those calories came from protein, the resulting equation would be (700 x 100) divided by 2,000 = 35 percent of calories from protein.
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