Height to Weight Guide: Infants Through Teens

Looking for reliable growth data for kids from birth through their teenage years? These charts provide helpful reference points for parents and healthcare providers tracking development from infancy through age 20.

Keep in mind that these numbers show average ranges based on data from the World Health Organization and the U.S. Centers for Disease Control and Prevention. They're meant as guidelines, not strict standards—every child grows at their own pace.

Note: If you're over 20, you'll want different charts designed for adults.

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Understanding These Charts

Height and weight charts give you a general sense of where a child falls compared to averages, but they're not perfect indicators of health—especially for younger kids and teens. Think of them as one tool in the toolbox, best used alongside other assessments like BMI calculators designed for children.

All measurements appear in both metric (kilograms and centimeters) and imperial units (pounds and inches) for convenience. If you need to perform weight conversions visit our Stones, Pounds, Kilograms Conversion Chart

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Girls: Height and Weight Data

Printable Girls Height to Weight Chart From Baby to Teen Years

Baby Girls (0-11 Months)

Babies come in every shape and size. If your baby falls into a lower or higher percentile, that doesn't automatically mean something's wrong. The real sign of healthy growth is steady, consistent weight gain—it shows your baby is eating well and developing normally.

Toddler Girls (12-23 Months)

Toddlers are all over the map when it comes to size, which makes it tough to know if your child is on track. But here's the thing: the numbers below are just benchmarks. If your toddler is heavier or lighter, taller or shorter—don't panic. It doesn't mean anything's wrong.

Girls Ages 2-12

By age ten, the average girl weighs around 70.5 pounds (31.9 kg). But "average" covers a huge range—girls can weigh anywhere from 53 to 102 pounds and still be perfectly healthy. That's because kids grow at wildly different rates. What matters most is that your child is growing steadily over time, not where she lands on any given day.

Teenage Girls (13-20 Years)

Height and weight depend on a mix of genetics and environment. They also vary by gender, age, race, ethnicity, and where you live. Throughout childhood, kids' bodies gradually become more proportional. Girls typically start puberty around ages 10-11 and finish around 15-17. During those years, teenage girls experience major changes—weight shifts, bone development, height gains, and changes in body fat distribution, especially during puberty.

Boys: Height and Weight Data

Printable Boys Height to Weight Chart From Baby to Teen Years

Baby Boys (0-11 Months)

In the United States, newborn boys typically weigh 7 pounds 8 ounces (3.4 kg) and measure 19.7 inches (49.9 cm) at birth. Most babies gain about an ounce daily until they hit three months. By four months, most have doubled their birth weight. By their first birthday, most have tripled it.

Toddler Boys (12-23 Months)

All kids grow at their own speed. That said, here's what's typical for boys between 1 and 2 years old: expect about 4 to 6 pounds of weight gain and roughly 2 to 3 inches in height growth.

Boys Ages 2-12

Boys often experience a sudden growth spurt between ages 9 and 15, gaining 8 to 10 pounds per year. Just remember that lots of kids in this age range are hitting their pubertal growth spurt. Sometimes they look overweight on a weight-for-age chart when really, they're just tall for their age.

Teenage Boys (13-20 Years)

Boys usually start puberty around 11 or 12 and wrap up around 16 or 17. During these years, growth spurts are common. In fact, puberty brings the fastest growth you'll ever experience. It's totally normal to gain and lose weight quickly or add several inches to your height seemingly overnight.

Comparing Teen Growth: Girls vs. Boys (Ages 13-19)

When you look at growth patterns for teenagers, you'll notice boys and girls develop quite differently during these years. Girls typically reach their full height earlier, while boys continue growing taller later into their teens. Both groups experience significant changes in weight and body composition throughout adolescence.

A Word About Teen Dieting

Every child matures differently during their teenage years. Putting teens on diets usually isn't a good idea—they often just "grow out" of their baby fat naturally as they mature into young adults.

If you're concerned about your child's height-to-weight ratio, talk to your pediatrician or family doctor. They can use medical growth charts to track your child's progress over time and spot any issues that need attention.

Data Sources

World Health Organization (WHO), Gerontology Research Center at the National Institutes of Health (NIH), and the U.S. Centers for Disease Control and Prevention (CDC).

Insights, Analysis, and Developments

Author Credentials: Ian is the founder and Editor-in-Chief of Disabled World, a leading resource for news and information on disability issues. With a global perspective shaped by years of travel and lived experience, Ian is a committed proponent of the Social Model of Disability-a transformative framework developed by disabled activists in the 1970s that emphasizes dismantling societal barriers rather than focusing solely on individual impairments. His work reflects a deep commitment to disability rights, accessibility, and social inclusion. To learn more about Ian's background, expertise, and accomplishments, visit his full biography.