Public tool
Macro calculator
Convert chosen calories and a percentage split into grams of protein, fat and carbohydrate. The calculation runs only in this browser.
Calculation details
Formula and limits
Protein and carbohydrate: calories × share ÷ 4. Fat: calories × share ÷ 9. Results are rounded to 0.1 g; percentages must be whole numbers that total 100.
This calculator only translates the values you chose. It does not recommend a macro split, account for health status, or give a personal recommendation.
Frequently asked questions
Why must percentages total 100?
It makes sure the whole calorie figure is assigned across the three macronutrients.
Can calorie input include a decimal?
Yes. A comma or period is accepted for calories, while percentages remain whole numbers.
Is this a meal plan?
No. It does not create a meal plan or replace a conversation with a qualified professional.
Important
This result is for information only, does not replace medical care, and is not intended for people under 18, during pregnancy or breastfeeding, with eating disorders, health conditions, or medicines that affect weight.