Child Growth Chart by Age: Height, Weight & Growth Percentiles Explained

Parents often wonder whether their child is growing at the right rate. Is the height normal for the child's age? Is the weight too low or too high? Should a child be on the 50th percentile? These are common questions, and a child growth chart by age can help answer them.

Growth charts are tools used by healthcare professionals to track a child's growth over time. They help compare measurements such as height or length, weight, head circumference, and body mass index (BMI) with children of the same age and sex. However, a growth chart is not a simple pass-or-fail test. A child does not have to be on the 50th percentile to be healthy.

What matters most is the overall growth pattern. A child who consistently follows a particular growth curve may be growing normally, even if that child is naturally smaller or larger than average. A significant change in the growth pattern, especially when combined with symptoms or other health concerns, may require further evaluation.

In this guide, we explain the child growth chart by age, how height and weight percentiles work, what measurements are used, how to interpret growth trends, and when parents should talk with a pediatrician.

Child growth chart by age showing height and weight growth monitoring

Growth charts help healthcare professionals track a child's growth pattern over time.

What Is a Child Growth Chart?

A child growth chart is a visual tool that helps healthcare professionals monitor physical growth. A child's measurements are plotted on a chart according to age and sex and then compared with standardized growth patterns.

Depending on the child's age, growth monitoring may include:

Weight-for-age
Length-for-age in younger children
Height-for-age
Weight-for-length or weight-for-height
BMI-for-age in appropriate age groups
Head circumference-for-age, especially in infants and young children

The WHO Child Growth Standards are designed to describe how children from birth to 5 years can grow under optimal conditions. WHO also provides growth reference data for children and adolescents aged 5 to 19 years.

In the United States, the CDC recommends WHO growth standards for children from birth to 2 years and CDC growth charts for children aged 2 years and older. Other countries may use national or WHO-based charts according to local clinical guidelines.

Healthcare professional measuring child's height weight and head circumference

Growth monitoring may include height or length, weight, head circumference, and BMI-for-age depending on the child's age.

Child Growth Chart by Age: What Is Measured?

1. Weight

Weight is commonly monitored from infancy through adolescence. It can help identify patterns of healthy growth as well as possible undernutrition, excessive weight gain, or weight loss.

Weight should not be interpreted alone. A child who weighs less than another child of the same age may still be healthy if height, development, nutrition, and growth over time are appropriate.

2. Length or Height

For younger children who cannot stand reliably, healthcare providers measure body length while the child is lying down. Once a child can stand properly, standing height is measured.

Height-for-age helps healthcare professionals assess whether a child is growing in length or height as expected over time.

3. Head Circumference

Head circumference is especially important during infancy and early childhood. It provides information about head and brain growth and is commonly tracked during routine pediatric visits.

A single measurement is usually less informative than the pattern of measurements over time. Healthcare professionals consider head circumference alongside the child's overall development and other growth measurements.

4. BMI-for-Age

For children and adolescents, BMI is interpreted differently from adult BMI. A child's BMI is compared with children of the same age and sex using BMI-for-age growth charts.

Because children are continuously growing, BMI-for-age percentiles are used rather than applying adult BMI categories directly to children.

Child Growth Chart by Age: General Growth Stages

Children do not all grow at exactly the same speed. Growth is influenced by genetics, nutrition, overall health, hormones, physical activity, and the timing of puberty.

Age Group	Typical Growth Monitoring	What Parents Should Know
Birth to 6 months	Weight, length, head circumference	Growth can be rapid during early infancy. Feeding and hydration are important considerations.
6 months to 2 years	Weight, length/height, head circumference, weight-for-length	Growth patterns may change as complementary foods are introduced and mobility increases.
2 to 5 years	Weight, height, BMI-for-age	Growth usually becomes more gradual compared with infancy.
5 to 10 years	Height, weight, BMI-for-age	Children may grow steadily but at different individual rates.
10 to 13 years	Height, weight, BMI-for-age, puberty-related changes	The timing of the growth spurt varies between children.
13 to 19 years	Height, weight, BMI-for-age and pubertal development	Growth may accelerate during puberty and then gradually slow as physical maturity is reached.

Important: This table describes broad growth stages, not fixed normal height or weight targets. For an individual child, the correct interpretation should be based on the appropriate age- and sex-specific growth chart and the child's measurements over time.

What Do Growth Percentiles Mean?

Percentiles are often misunderstood by parents. A percentile is not a school grade and does not tell you whether a child is healthy or unhealthy by itself.

For example, if a child's weight is at the 50th percentile, it means that, in the reference population used to create the chart, approximately half of children of the same age and sex weigh less and half weigh more.

A child at the 10th percentile is not automatically underweight, just as a child at the 90th percentile is not automatically overweight.

The most important question is often whether the child is following a consistent growth pattern. Healthcare professionals look at multiple measurements taken over time rather than relying on one isolated percentile.

The MedlinePlus explanation of growth charts also emphasizes that growth charts can help monitor growth and may provide an early warning of a possible problem, but an unusual growth pattern does not automatically mean that a child has a disease.

Child growth percentiles explained including the 50th percentile

A percentile describes how a child's measurement compares with others of the same age and sex; it is not a health grade.

Why Is the 50th Percentile Not the Goal?

Many parents assume that the 50th percentile is the ideal target. This is not correct.

The 50th percentile represents the middle of the reference distribution. It does not mean that a child at the 50th percentile is healthier than a child at the 20th or 80th percentile.

Children naturally have different body sizes. Genetics also plays a major role in determining height and body build.

For example, a child with shorter parents may naturally be shorter than classmates. If the child's growth is steady and the child is otherwise healthy, this may be completely normal.

According to the American Academy of Pediatrics' HealthyChildren.org, growth charts are mainly used to understand the child's growth trend. Consistency over time is generally more important than trying to reach a particular percentile.

WHO Growth Standards vs CDC Growth Charts

Parents may see different growth charts online and become confused about which one to use. The answer depends on the child's age, location, and the healthcare system being used.

Growth Chart System	Age Range	Main Use
WHO Child Growth Standards	Birth to 5 years	International standard for assessing growth under optimal conditions
WHO Growth Reference	5 to 19 years	International reference for school-age children and adolescents
CDC Growth Charts	2 to 20 years	Clinical growth monitoring in the United States

The WHO guidance on child growth standards explains that WHO standards apply from birth to 5 years and that the WHO 2007 growth reference complements these standards for children aged 5 to 19 years.

The CDC growth chart guidance states that growth charts are tools for tracking growth and should not be used as the sole diagnostic instrument.

Comparison concept of WHO and CDC child growth chart systems

Growth chart systems vary by age and clinical setting; healthcare professionals use the appropriate reference for each child.

Factors That Affect a Child's Growth

Growth is influenced by many factors. A child's growth pattern may be affected by:

Genetic potential and family height
Overall nutrition and calorie intake
Protein, vitamin and mineral intake
Chronic or recurrent illnesses
Digestive or absorption problems
Hormonal conditions
Thyroid disorders
Long-term medication use in some situations
Sleep and overall physical health
Physical activity
Puberty timing
Emotional and social factors in certain circumstances

For example, persistent nutritional deficiencies may affect growth. Parents can learn more about nutritional concerns from resources such as our articles on Vitamin D deficiency and iron deficiency anemia.

However, parents should not assume that every short or thin child has a vitamin deficiency. A pediatrician may need to assess the child's diet, family growth pattern, medical history and physical examination before deciding whether testing is necessary.

What Causes Slow or Poor Growth in Children?

Slow growth can have many possible causes. Some children are naturally smaller because of family genetics and remain healthy. Other children may have an underlying nutritional, hormonal, gastrointestinal, genetic, or chronic health condition.

Possible Causes Include

Insufficient calorie or protein intake
Feeding difficulties in infancy
Food allergies or intolerances
Chronic digestive conditions affecting nutrient absorption
Long-term infections or chronic illnesses
Thyroid or other hormonal disorders
Growth hormone deficiency in selected cases
Genetic or chromosomal conditions
Delayed puberty
Other medical conditions affecting nutrition or metabolism

Children with suspected food allergies may benefit from reading about food allergy symptoms, diagnosis and treatment, but any suspected allergy should be properly evaluated by a healthcare professional.

Signs That a Child's Growth May Need Medical Evaluation

A growth chart should not be interpreted in isolation. Parents should discuss growth with a pediatrician if they notice:

The child is consistently losing weight.
The child is not gaining weight as expected.
Height growth appears to slow significantly.
The child crosses several major percentile lines downward over time.
The child is much shorter or lighter than expected based on family growth patterns.
There are persistent feeding difficulties.
The child has chronic diarrhea, vomiting, abdominal pain, or other digestive symptoms.
The child has persistent fatigue or weakness.
Puberty appears significantly delayed or unusually early.
There are concerns about developmental progress or overall health.

A single measurement outside the expected range does not automatically mean there is a serious problem. Measurement errors can occur, and children can have temporary changes in growth. The overall pattern and clinical context are important.

How Doctors Evaluate a Child's Growth

If a pediatrician is concerned about growth, the evaluation may include:

Reviewing previous height and weight measurements
Plotting measurements on the appropriate growth chart
Checking growth velocity over time
Reviewing parental heights and family growth patterns
Assessing nutrition and eating habits
Reviewing medical history and medications
Performing a physical examination
Assessing puberty and development when appropriate
Ordering blood tests or other investigations when clinically indicated

Not every child with a low percentile needs extensive testing. The decision depends on the child's growth trend, symptoms, examination findings, and overall health.

How to Support Healthy Growth in Children

Parents cannot control every aspect of a child's height, but they can support healthy development by providing a balanced lifestyle.

Provide a Balanced Diet

Children need adequate energy and nutrients for growth. Meals should generally include a variety of vegetables, fruits, whole grains or other appropriate carbohydrate sources, protein-rich foods, and healthy fats.

Depending on age and dietary preferences, protein may come from eggs, dairy foods, beans, lentils, soy, fish, poultry, or other suitable sources.

Parents should avoid unnecessary restrictive diets in growing children unless recommended by a qualified healthcare professional.

For families managing diabetes or blood sugar concerns, our guide to best foods for diabetes provides general nutrition information, although children's nutritional needs should always be individualized.

Encourage Regular Physical Activity

Age-appropriate physical activity supports healthy bones, muscles, cardiovascular health and overall well-being. Children should have opportunities for active play and movement rather than spending most of the day sitting.

Prioritize Sleep

Good sleep is important for children's physical and emotional health. Sleep needs vary according to age, so parents should follow age-appropriate sleep recommendations and discuss persistent sleep problems with a healthcare professional.

Keep Regular Health Visits

Routine pediatric visits allow healthcare professionals to monitor growth and development over time. Keeping previous measurements available can make it easier to identify meaningful changes in growth patterns.

Healthy lifestyle habits that support children's growth and development

Balanced nutrition, regular physical activity, adequate sleep, and routine healthcare support healthy childhood development.

Can Parents Check a Child's Growth Chart at Home?

Parents can use official growth chart resources to understand how growth monitoring works. However, measurements taken at home may not always be accurate, especially for infants and young children.

For the best assessment:

Use accurate measuring equipment.
Measure height or length correctly.
Record the child's age accurately.
Use the correct chart for sex and age.
Compare measurements over time rather than focusing on one result.

Parents should avoid making dietary or medical decisions based only on a percentile number found online.

When Should You See a Doctor About Your Child's Growth?

Talk with your child's pediatrician if you are concerned about the child's growth, especially if the concern involves ongoing weight loss, poor weight gain, significant slowing of height growth, persistent digestive symptoms, feeding difficulties, or delayed development.

Seek prompt medical care if a child has severe symptoms such as difficulty breathing, severe dehydration, persistent vomiting, unusual drowsiness, loss of consciousness, or other signs of serious illness.

Growth concerns are usually best evaluated early. A pediatrician can determine whether the child's growth pattern is simply a normal variation or whether further assessment is appropriate.

Frequently Asked Questions About Child Growth Charts

What is a normal height for a child by age?

There is no single normal height for every child at each age. Height varies according to age, sex, genetics and growth pattern. A child's height should be interpreted using an appropriate growth chart and compared with previous measurements.

What is the normal weight for a child by age?

There is no single ideal weight for every child of a particular age. Weight should be interpreted together with height or length, age, sex and growth trend.

Is the 50th percentile the best percentile?

No. The 50th percentile is simply the middle of the reference distribution. A child can be healthy at many different percentiles. Consistent growth over time is often more important than reaching the 50th percentile.

Is the 10th percentile too low?

Not necessarily. Some healthy children naturally track around the 10th percentile. A pediatrician may become more concerned if the child's growth pattern changes significantly or if there are other symptoms.

What if my child suddenly drops percentiles?

A significant downward change in growth trajectory deserves attention, particularly if it is persistent. The pediatrician will review previous measurements, nutrition, health history and other factors to determine whether further evaluation is needed.

Which growth chart should I use?

The appropriate chart depends on the child's age and the clinical guidance used in your country. WHO standards are widely used internationally for children under 5 years, while WHO provides references for ages 5–19 years. The CDC uses WHO standards for children under 2 years and CDC charts for children aged 2 years and older in US clinical practice.

Can a short child still be healthy?

Yes. Some children are naturally shorter because of genetics or family growth patterns. If the child's growth remains steady and there are no concerning symptoms, short stature may simply be a normal variation. A pediatrician can assess whether the growth pattern is appropriate.

Can nutrition increase a child's height?

A balanced diet helps children reach their genetic growth potential, but no food or supplement can guarantee a specific adult height. Children with nutritional deficiencies or medical conditions may need targeted treatment under professional guidance.

Conclusion

A child growth chart by age is a valuable tool for understanding how a child is growing over time. It can track weight, length or height, head circumference and BMI-for-age, depending on the child's age.

The most important point for parents is that there is no single perfect percentile. A child does not need to be at the 50th percentile to be healthy. What matters is the child's individual growth pattern, growth velocity, family characteristics, nutrition, development and overall health.

If you are worried about your child's height, weight or growth pattern, do not rely on an online chart alone. Share the child's growth records with a pediatrician. Early evaluation can help identify nutritional issues, chronic conditions or other causes of abnormal growth when treatment or support is needed.

Medical Disclaimer

This article is intended for general health education and does not replace professional medical advice, diagnosis or treatment. Growth charts and percentile information should not be used to diagnose a medical condition on their own. If you have concerns about your child's growth, nutrition, development, or health, consult a qualified pediatrician or healthcare professional. Never start supplements, restrictive diets, growth treatments, or medicines for a child without appropriate medical guidance.

Child Growth Chart by Age: Height, Weight & Growth Percentiles