UNDERSTAND THE METHOD
How to use this calculator
Enter energy and select an example split. When you edit one percentage, the other two redistribute to keep the total at 100%. Percentages you have already typed stay as typed. Select the preset again to reset its percentages. Protein and carbohydrate supply approximately 4 kcal/g; fat supplies approximately 9 kcal/g.
What the result can tell you
Named presets are calculator examples, not official definitions or personalized diets. Some are outside the adult acceptable macronutrient ranges. A 100% total does not establish nutrient adequacy. Food labels can use other factors for fiber and other components.
Common questions
How does the calculator keep the percentages at 100%?
When you edit one percentage, the other two redistribute to keep the total at 100%. Percentages you have already typed stay as typed. Select the preset again to reset its percentages.
Are the named macro splits personalized diets?
No. They are calculator examples. Some are outside adult reference ranges, and a 100% total does not establish nutrient adequacy.
Sources & limitations2 sources
Sources checked September 12, 2026. These notes identify methods and assumptions. They have not received an independent clinical review.
- Adult macronutrient reference ranges.nap.nationalacademies.org
- General food energy factors for protein, carbohydrate, and fat.inspection.canada.ca