Acceptable Macronutrient Distribution Range from Dietary Reference Intakes.

It shows age ranges, but child planning should involve caregivers and professionals.

Fiber is not calculated here, but carbohydrate quality matters.

Macro Calculator

Split calories into protein, carbohydrates and fat using AMDR ranges.

Nutrition disclaimer: educational tool only. Macro distribution does not replace a dietitian, especially with kidney disease, diabetes, pregnancy, lactation, competitive sport or eating-disorder history.

AgeyearsCalorieskcal/dayProtein%Carbohydrates%Fat%

DistributionAdults

2,200kcal/day

Macro	Selected	AMDR range
Protein	110 g · 20%	10–35% · 55–193 g
Carbohydrates	275 g · 50%	45–65% · 248–358 g
Fat	73 g · 30%	20–35% · 49–86 g

Grams use kcal/g: protein and carbohydrate 4 kcal/g, fat 9 kcal/g. AMDR ranges are population guidance, not an individualized diet.

Macros = calories × percentage ÷ kcal per gram. AMDR: carbohydrates 45–65%; protein and fat vary by age.

NCBI/National Academies: AMDR

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Details below

About this tool

Macros based on references, not trends.

The calculator uses Dietary Reference Intake AMDR ranges to convert energy percentages into grams. It helps explain diet composition but does not prescribe a meal plan.

How to use

Enter calories and adjust percentages.

Enter estimated or planned daily calories.
Adjust percentages within acceptable ranges.
Compare selected grams with AMDR ranges by age.

AMDR

How to read macro ranges

AMDR means acceptable macronutrient distribution range. Being inside the range does not guarantee diet quality: fiber, micronutrients, food quality and individual context still matter.

Carbohydrates: 45–65% of energy.
Protein: 10–35% in adults; lower ranges for younger children.
Fat: 20–35% in adults; higher ranges in children.

FAQ

Does it build a diet?

No. It converts percentages to grams and shows population ranges.

What is AMDR?

Is higher protein always better?

Are carbohydrates required?

Does fat have more calories?

Can children use it?

What about fiber?

Should percentages sum to 100?

Can I use it for bulking/cutting?

Is data saved?

Health

Macros based on references, not trends.

Enter calories and adjust percentages.

How to read macro ranges

FAQ

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