This depends upon two things: what kind of food are you eating, and how much of it are you eating.
it is 100 calories in a protein shake
Dietary protein has a metabolic energy density of roughly 4.9 kcal/gram, so 8 grams of protein is roughly 39 calories.
A gram of protein is 4 Calories, so 10 grams of protein provides 40 calories.
A food source with five grams of protein, ten grams of fat, and twenty grams of carbohydrates contains 190 calories. To find this, you need to know how many calories are in a gram of protein, fat, and carbohydrates. There are four calories in one gram of protein and one gram of carbohydrates. There are nine calories in one gram of fat. Then multiply five (the number of grams of protein) by four (the number of calories in one gram of protein), ten (the number of grams of fat) by nine (the number of calories in one gram of fat), and twenty (the number of grams of carbohydrates) by four (the number of calories in one gram of carbohydrates). Add those numbers up and you will know how many calories are in the food.
1 gram of protein = 4 calories.
how many calories in 100g protein
1 g of protein has 4 calories so o ounce of protein has 113.4 calories
There are 4 calories per gram of protein.
68
4 calories
81 calories. For each gram of fat you have nine calories. 9 times 9 is 81 - therefore 81 calories.
Every gram of carbohydrate has 4 calories, so 20 grams of carbohydrates would be 80 calories. But you also have to take into account the amount of protein and fat grams in the food, as well. Protein has the same amount of calories as carbohydrates (4 calories per gram) and fat has 9 calories per gram.