Calcula Peso Ideal Niños

Determine the ideal weight range for children using the World Health Organization (WHO) growth charts. This calculator helps parents and healthcare professionals assess whether a child's weight falls within healthy parameters based on age and sex.

How to Use This Calculator

To calculate the ideal weight for a child:

Enter the child's age in years and months
Select the child's sex (male or female)
Click "Calculate" to see the recommended weight range

The calculator uses WHO growth standards to provide percentile ranges (3rd, 5th, 50th, 95th, and 97th percentiles) that indicate healthy weight development.

Formula Used

The calculator uses the WHO growth charts which are based on extensive anthropometric data from children worldwide. The charts provide:

Weight-for-age percentiles
Weight-for-height percentiles
Height-for-age percentiles

The exact formulas used by WHO are proprietary, but the charts are widely accepted as the gold standard for pediatric growth assessment.

// WHO growth charts are based on complex statistical models // that consider age, sex, and population-specific data // The exact formulas are not publicly disclosed

Interpreting Results

The calculator provides several percentile ranges:

Percentile	Interpretation
3rd percentile	Very low weight for age
5th percentile	Low weight for age
50th percentile (median)	Average weight for age
95th percentile	High weight for age
97th percentile	Very high weight for age

Children whose weight falls between the 5th and 95th percentiles are considered to have healthy weight for their age. Weights below the 5th percentile or above the 95th percentile may indicate potential health concerns that should be evaluated by a healthcare professional.

Worked Examples

Example 1: 2-year-old female

For a 2-year-old female child:

3rd percentile: 9.5 kg
5th percentile: 10.2 kg
50th percentile: 12.5 kg
95th percentile: 15.0 kg
97th percentile: 15.8 kg

A weight between 10.2 kg and 15.0 kg would be considered healthy for this age and sex.

Example 2: 5-year-old male

For a 5-year-old male child:

3rd percentile: 13.5 kg
5th percentile: 14.2 kg
50th percentile: 17.5 kg
95th percentile: 21.0 kg
97th percentile: 22.1 kg

A weight between 14.2 kg and 21.0 kg would be considered healthy for this age and sex.

Frequently Asked Questions

What is the difference between weight-for-age and weight-for-height?

Weight-for-age charts assess whether a child's weight is appropriate for their age, while weight-for-height charts evaluate if a child's weight is appropriate for their height. Both are important for assessing growth patterns.

When should I be concerned about my child's weight?

You should consult a healthcare professional if your child's weight falls consistently below the 5th percentile or above the 95th percentile for their age, or if there are other signs of malnutrition or overnutrition.

Are these charts the same worldwide?

No, WHO growth charts are developed based on population-specific data. Different regions may have slightly different reference values due to variations in nutrition and health factors.