Nutrition
Calories from grams
The reverse direction: convert grams back into calories. Useful for checking a plan or reading a nutrition label.
The Formula
C = 4p + 4c + 9f
The reverse direction: convert grams back into calories. Useful for checking a plan or reading a nutrition label.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| p | Protein | grams | Grams of protein. |
| c | Carbohydrate | grams | Grams of carbohydrate. |
| f | Fat | grams | Grams of fat. |
| C | Total calories | kilocalories | Energy the three macros supply together. |
What Each Symbol Means
pgrams
Protein
Grams of protein.
cgrams
Carbohydrate
Grams of carbohydrate.
fgrams
Fat
Grams of fat.
Ckilocalories
Total calories
Energy the three macros supply together.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate macros page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate Macros, filed under Health. Every number the guide produces comes from substituting into this one line.