Summary
Splits daily calories into protein, carbohydrate, and fat gram targets from percentage shares.
Calculation details
Percentages must sum to 100. Uses 4 kcal/g for protein and carbs and 9 kcal/g for fat.
Formula
Protein g = kcal × protein% / 400; carbs g = kcal × carb% / 400; fat g = kcal × fat% / 900.
Worked example
Macro worked example
2,000 kcal at 30/40/30 yields about 150 g protein, 200 g carbs, and 67 g fat.
How it works
Enter daily calories and protein/carb/fat percentage shares that sum to 100. Adjust percentages to match coaching or clinical guidance you already trust.
Frequently asked questions
Is this a medical diagnosis?
No. It is an educational estimate and cannot diagnose a condition or replace individualized professional advice.
Why can my actual result differ?
Percentage splits are planning choices; digestion and labeling can differ from calculated grams.
When is this calculator most useful?
Use it after you already have a calorie target and want gram splits that sum to 100%.
How are results rounded?
The calculation retains full precision; centralized display formatting rounds only the visible result.