Formula
Carbohydrate is treated as 4 kilocalories per gram:
Grams = calories × percent / 100 / 4
The macro page locks the share at 40%. This page uses the percent you type.
Assumptions
- Every carbohydrate gram is 4 kcal.
- The percent is a share of the calorie total, from 1 to 100.
Worked example
Half of 2,000 kcal is 250 g of carbohydrate.
Input definitions
- Carbohydrate share
- The percent of calories assigned to carbohydrate.
Limitations
This is an informational estimate for adults. It is not a diagnosis, a diet plan, or a training prescription. Pregnancy, illness, and medication can change what is appropriate.
Questions
Does this subtract fiber?
No. It converts the calorie share into grams. It does not know the food.
Why divide by 4?
The Atwater-style energy factor used here is 4 kcal per gram of carbohydrate.