Enter the total grams of protein (g) into the calculator to determine the Energy from Protein.
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Energy from Protein Formula
The following equation is used to calculate the Energy from Protein.
E = P*4
Variables:
- Where E is the Energy from Protein (kcal)
- P is the total grams of protein (g)
To calculate the energy from protein, multiply the protein weight in grams by 4.
| Protein (g) | Energy (kcal) |
|---|---|
| 1 | 4 |
| 2 | 8 |
| 3 | 12 |
| 5 | 20 |
| 7 | 28 |
| 10 | 40 |
| 12 | 48 |
| 15 | 60 |
| 20 | 80 |
| 25 | 100 |
| 30 | 120 |
| 35 | 140 |
| 40 | 160 |
| 45 | 180 |
| 50 | 200 |
| 60 | 240 |
| 75 | 300 |
| 80 | 320 |
| 90 | 360 |
| 100 | 400 |
| *Uses Atwater factor for protein: 1 g protein = 4 kcal (≈ 16.736 kJ). Default energy unit in calculator: kcal. | |
How to Calculate Energy from Protein?
The following two example problems outline the steps and information needed in order to calculate the Energy from Protein.
Example Problem #1:
- First, determine the total grams of protein (g). In this example, the total grams of protein (g) is measured to be 45.
- Finally, calculate the Energy from Protein using the formula above:
E = P*4 = (kcal)
Inserting the values from above and solving the equation with the imputed values gives:
E = 45*4 = 180 kcal
Example Problem #2:
Using the same process as example problem 1, we first define the needed variables outlined by the formula. In this case, the values are provide as:
total grams of protein (g) = 40
Entering these values into the formula or calculator above gives us:
E = 40*4 = 160 (kcal)
