Convert user-entered macro targets with transparent 4/4/9 energy factors and no automatic normalisation.
Calculate with the Macro Calculator
Enter the values below. Required fields are checked before results are shown.
Macro Calculator results
How to use the Macro Calculator
- Select the requested method and measurement system where available.
- Enter measurements using the units shown in each label.
- Select Calculate or press Enter.
- Review the method, source, assumptions, limitations, and visible safety note.
Worked example
A 40% carbohydrate, 30% protein, 30% fat split at 2,000 kcal gives 200 g carbohydrate, 150 g protein, and about 66.7 g fat.
Understanding the result
No macro allocation is presented as universally best.
Assumptions
- Targets use the same daily period.
- General Atwater factors are suitable for estimation.
Limitations
- Food labels and metabolizable energy can differ.
- Disease-specific dietary planning is outside this calculator.
Sources and method references
- National Academies dietary energy factors (2005). Uses general 4 kcal/g protein, 4 kcal/g carbohydrate, and 9 kcal/g fat factors.
Frequently asked questions
Why must percentages total 100%?
The result is an educational estimate based on the selected method and entered assumptions. Individual measurements, needs, and outcomes vary.
Does CalculatorCheck store inputs from the Macro Calculator?
No. The calculation runs locally in your browser; entries are not saved, transmitted, or added to the page URL.
Is this medical or dietary advice?
No. It does not diagnose, treat, or prescribe for any condition.