Nutrition
Checking the split adds to one
The three shares must sum to one. A total above one produces more calories than the target; below one leaves calories unassigned.
The Formula
p + c + f = 1
The three shares must sum to one. A total above one produces more calories than the target; below one leaves calories unassigned.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| s_p | Protein share | dimensionless | Decimal share of calories from protein. |
| s_c | Carbohydrate share | dimensionless | Decimal share of calories from carbohydrate. |
| s_f | Fat share | dimensionless | Decimal share of calories from fat. |
What Each Symbol Means
s_pdimensionless
Protein share
Decimal share of calories from protein.
s_cdimensionless
Carbohydrate share
Decimal share of calories from carbohydrate.
s_fdimensionless
Fat share
Decimal share of calories from fat.
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.