The Macro Calculator estimates daily calories and macronutrient grams from body data, activity, goal, and a selected split.
It first estimates energy needs, adjusts calories for the selected goal, and converts macro calorie shares using 4 kcal per gram for protein and carbohydrate and 9 kcal per gram for fat.
Example
For a 2,000-calorie target with a balanced 30/40/30 split, the modeled output is 150 g protein, 200 g carbohydrate, and about 67 g fat after rounding.
Questions
Are these targets medical advice?
No. They are estimates based on population equations and assumptions.
Why can rounded macros differ from calories?
Rounding grams creates small display differences.
Can goals change the calorie target?
Yes. The component adjusts the estimated energy target for loss, maintenance, or gain.
Health notice and limitations
The tool does not assess medical conditions, pregnancy, breastfeeding, medication, or individual clinical nutrition requirements.