Toddler Growth Chart - Height, Weight, and What the Numbers Actually Mean

Published - April 2025 Last Updated - April 2026

You leave a check-up, and the pediatrician hands you a chart with percentage files on it.

Your toddler is in the 35th percentile for weight. The 72nd for height. And you walk to the car, wondering whether that is good, bad, or completely normal.

Here is the answer: for most toddlers, it is completely normal.

The toddler growth chart is one of the most valuable but most misunderstood tools in pediatric care. They are not pass-or-fail tests. They are tracking tools — and understanding what they tell you changes everything about how you read them.

Visit our complete toddler guide for more on every aspect of toddler development.

What Is a Toddler Growth Chart?

A growth chart is a tool that plots your child's measurements against a reference population to show whether they are growing within the expected range for their age and sex.

Pediatric growth charts have been used by pediatricians, nurses, and parents to track infant and child growth in the United States since 1977, according to the CDC.

There are two main chart systems used globally:

• WHO Growth Standards - Used for children from birth to 24 months. Based on a study of children raised in optimal conditions — breastfed, non-smoking households — across multiple countries.
• CDC Growth Reference Charts - Used for children aged 2 to 20 years. Based on representative US population data from national health surveys.

When your child turns 2, their pediatrician switches from WHO charts to CDC charts. This is standard practice and the right approach for each developmental stage.

Key fact from the CDC - Growth charts are not intended to be used as a sole diagnostic instrument. They are tools that contribute to forming an overall health picture. A single measurement tells you less than a pattern of measurements over time.

What Do Percentiles Mean on a Growth Chart?

A percentile tells you how your child's measurement compares to other children of the same age and sex. It does not tell you whether your child is healthy.

If your 2-year-old is in the 40th percentile for weight, it means they weigh more than 40% of children their age and less than 60%. That is entirely normal.

There is no "good" percentile and no "bad" percentile. A child consistently in the 10th percentile who is growing steadily along that curve is developing normally. A child who drops suddenly from the 70th to the 30th percentile in a short period is showing a pattern that warrants investigation.

What pediatricians look for -

• Is the child growing along a consistent percentile curve?
• Are height, weight, and head circumference proportionate?
• Is there any sudden or unexplained shift in the growth curve?

Average Toddler Height and Weight by Age

These figures are approximate averages based on CDC and WHO reference data. Every child is unique, and wide variation is completely normal.

Expected toddler growth rates -

• Weight - Toddlers typically gain 2 to 3 kg (4.4 to 6.6 pounds) per year
• Height - Toddlers grow approximately 12 cm (4.7 inches) per year

This is significantly slower than infancy, when babies triple their birth weight in their first year. The slowdown is completely normal.

Why Toddlers Come in All Sizes?

Genetics is the most important factor in your child's size. Charts help monitor trends, but cannot define what your individual child's growth "should" be.

A tall, lean toddler with a height in the 90th percentile and weight in the 50th percentile is completely normal. A shorter, stockier toddler with height in the 25th percentile and weight in the 60th percentile is also completely normal. These different builds are partly determined by genetics and partly by diet.

Pediatric growth guidance confirms that toddlers will not necessarily be on the same percentile line for height and weight, and this is expected.

Consider the parents' height. Parental stature is one of the strongest predictors of child height. A child with two shorter-stature parents who is consistently in the 15th percentile for height is likely following their genetic trajectory — not showing a growth problem.

What Causes Growth Concerns in Toddlers?

Failure to Thrive

This term describes a toddler who is not growing at an expected rate. It is not a diagnosis in itself; it is a signal to investigate further.

Causes can include -

• Insufficient caloric intake (sometimes linked to extreme picky eating)
• Medical conditions affecting absorption, such as coeliac disease or food allergies
• Chronic illness or infection
• Metabolic or endocrine conditions

Failure to thrive is diagnosed when a child's weight drops across two major percentile lines over time, or when they fall below the 3rd to 5th percentile for weight consistently.

Growth Hormone Deficiency

Rare but real. A child with a growth hormone deficiency typically falls far below expected height ranges and grows very slowly. This is assessed through specialist evaluation, bone age X-rays, and hormone testing.

Short Stature vs. Normal Variation

Short stature is defined clinically as falling below the 3rd percentile for height. But most children at the 3rd percentile are simply at the shorter end of normal variation, not medically short.

Pathological short stature requires investigation. Genetic short stature (small, healthy, following family patterns) does not.

How to Read Your Child's Growth Chart

At Home

You can track your child's measurements using the CDC's official growth chart tools at cdc.gov/growthcharts.

To use them accurately:

• Measure length lying down (recumbent) for children under 2
• Measure standing height for children 2 and older
• Weigh without shoes or heavy clothing
• Use metric or imperial consistently

At Check-Ups

At each well-child visit, your pediatrician will measure your toddler's weight, height, and head circumference and plot them on the chart. They look at the overall pattern, not just the percentile on any given day.

If your pediatrician expresses concern, they are responding to a trend in the chart, not a single number.

Common Parent Worries About Toddler Growth

"My toddler dropped a percentile. Should I worry?"

Some movement between percentile lines is normal, especially around ages 6 to 18 months,, as genetic potential begins to override birth weight patterns.

Dropping one or two minor percentile lines over a single period is not concerning. Dropping two or more major percentile lines (such as from the 75th to the 25th) over a short period warrants discussion with a pediatrician.

"My toddler is much smaller than other kids their age."

The size variation among children of the same age is enormous. A toddler at the 10th percentile and a toddler at the 90th percentile are both within the normal range.

If your child has always been small, is growing along their own consistent curve, and has small parents or parents, this is almost certainly normal variation.

"My toddler is gaining a lot of weight quickly."

Rapid weight gain, particularly if it crosses upward across major percentile lines, is worth discussing with a pediatrician. In toddlers, it is usually diet-related rather than medically concerning, but monitoring is appropriate.

When to Discuss Toddler Growth with Your Pediatrician

Most parents can relax. But these situations warrant a conversation:

• Your child's weight or height drops sharply across two or more major percentile lines
• Your child consistently falls below the 3rd percentile for weight or height
• Your child's head circumference shows an unusual pattern
• Your child is not eating and is not growing as expected
• You notice your child is significantly smaller than all peers of the same age, with no family history to explain it
• You are worried. Always ask if you are worried.

Keep Reading → Complete Toddler Guide → Toddler Milestones → Toddler Milestones 2 Years → Toddler Nutrition → Toddler Not Eating

People Also Ask

What is the average weight of a toddler?

Average toddler weight varies significantly by age and sex. At 12 months, boys average around 10 kg (22 lbs) and girls around 9.5 kg (21 lbs). By 36 months, boys average around 14 kg (31 lbs) and girls around 13.5 kg (30 lbs). Toddlers gain approximately 2 to 3 kg per year.

What percentile is normal for a toddler?

Any consistent percentile between the 3rd and 97th is within the normal range. There is no ideal percentile. A child consistently at the 10th percentile who is growing steadily is developing as expected.

How much should a 2-year-old weigh?

The average weight for a 2-year-old boy is approximately 12.5 kg (27.5 lbs.) and for a 2-year-old girl, approximately 12 kg (26.5 lbs.). Significant variation on either side is completely normal.

When should I be worried about my toddler's growth?

 Discuss it with a pediatrician if your child drops sharply across two or more major percentile lines, consistently falls below the 3rd percentile, or is not growing as expected, alongside other signs of poor health or nutrition.

What is the difference between the WHO and CDC growth charts?

WHO growth charts are used for children from birth to 24 months and are based on children raised in optimal conditions globally. CDC growth charts are used from age 2 onwards and are based on US population data. Pediatricians switch from one to the other at 24 months.

Sources and References

1.   CDC — "Growth Charts" (Official CDC Resource)  cdc.gov/growth charts

2.   CDC — "Using WHO Growth Standard Charts"  cdc.gov/growth-chart-training

3.   Surya Hospital — "Child Growth and Development: Average Weight and Height Chart" Based on WHO and CDC reference data  suryahospitals.com

4.   AAP — Clinical Practice Guidelines on Child Growth Evaluation Referenced via PediTools growth calculator  peditools.org/growth Pedi

Written By Adel Galal - Founder, ParntHub.com Father of four | Grandfather of four | 33+ years of parenting experience 🔗 Read Full Author Bio

Reviewed By: ParntHub Editorial Team Content informed by the CDC, WHO, AAP, and standard pediatric growth reference data used in clinical practice globally.