Welcome to BMI Count, your go-to resource for tracking teen health. Our BMI Calculator for Teens is built using medically reviewed formulas and CDC growth chart standards to give you an accurate body mass index result in seconds.
✅ Trusted by over 100+ users real users, with feedback
Whether you are a teen checking your health, or a parent tracking your teen child’s development, this teen-focused BMI calculator is fast, private, and completely free.
Our free BMI Calculator for Teens is designed for children aged 13 to 17 years old and follows standards developed by trusted sources like the CDC Growth Chart and WHO Child Growth Standards. It gives you quick results, no signup or downloads, just enter your child’s height, weight, age, and gender, and get instant health insights.
Whether you’re tracking your child’s growth or just want peace of mind, this tool offers an accurate, safe, and science-backed starting point.
At BMI Count, we’ve designed a BMI Calculator for Teens that’s simple to use but built on serious health science. This tool is specifically created for teens aged 13 to 17 and calculates their body mass index using formulas adapted from trusted organizations like the WHO, & CDC.
All you need to do is enter your teen’s:
Once submitted, the calculator gives you a BMI result, interpreted through age- and gender-specific BMI-for-age percentiles something most basic BMI calculators overlook.
You also get color-coded feedback, growth guidance, and options to download or share the result as a PDF or image, all without storing any personal data. This isn’t just a number, it’s a complete snapshot of your teen’s physical wellness.
Whether you're a parent supporting your teen’s growth or a teen taking charge of your own health, understanding your body mass index is a great place to start, and our BMI Calculator for Teens gives you the clarity you need, instantly.
Unlike adults, Counting BMI for teens isn’t just a number. It’s measured against standardized BMI-for-age percentiles, which compare your teen’s height and weight to others of the same age and gender based on trusted CDC growth charts.
When you use our BMI Calculator for Teens from BMI Count, you’ll not only get a BMI value but also a category that aligns with age-specific percentiles:
| BMI Percentile | Category |
|---|---|
| Below 5th percentile | Underweight |
| 5th to 85th percentile | Healthy Weight |
| 85th to 95th percentile | Overweight |
| 95th percentile and up | Obese |
This percentile-based result output approach provides more meaningful insight into a your teen’s growth than adult BMI ranges can offer. We also include color-coded results and personalized messages so teens (and parents) know exactly where they stand and what to consider next.
To support a full picture of health, we include Body Surface Area (BSA) calculations and tips based on your selected habit goal and activity level turning raw numbers into useful, real-life action points.
For teens, BMI Count is about more than weight it’s about growth, development, and health in context. That’s why our BMI Calculator for Teens gives percentile-based insights that truly reflect their stage of life.
While the BMI Calculator for Teens is a valuable health screening tool, it doesn’t capture everything like muscle mass, body shape, or growth patterns that vary during puberty. That’s why our calculator doesn’t just give you a number. It factors in your teen’s age and gender to provide a percentile-based BMI category using the medically proven formulas.
These insights help you see not just where your teen stands today, but also their development is on a healthy path as they continue to grow.
The teenage years are full of rapid growth, hormonal changes, and lifestyle shifts, and this makes them more important than ever to understand the basics of a healthy body mass index. A reliable BMI Calculator for Teens helps track whether a teen’s weight is in a healthy range for their age and gender, based on medical standards.
At BMI Count, we believe that health tools should empower, not overwhelm. That’s why our calculator is built to guide teens and parents with insights that are easy to understand and medically grounded — all in a judgment-free space.
Using a BMI Calculator during these formative years can help with:
When health is tracked properly, it is easier to stay on the right path, and to step in early if support is needed.
Teens go through major changes, physically and emotionally. A clear, accurate BMI Calculator for Teens can help turn those changes into positive, health-conscious habits that last a lifetime.
Understanding your BMI with our Free Online BMI Calculator for Teens is a simple step toward staying strong, energized, and focused for child health, growth and well being.
Built for Teens, Parents, and Health-Conscious Families
The BMI Calculator for Teens by BMI Count is scientifically proven and designed to support anyone invested in teenage health and development. Whether you’re checking in on your own progress or helping someone else grow strong and stay balanced, this tool gives you reliable insights backed by trusted medical guidelines.
Here’s who benefits most from using this BMI Calculator:
🧍 Teens (13–17 years)
Get a private, accurate snapshot of your current health status without judgment. Understand where you stand and build awareness for healthier habits.
👪 Parents & Guardians
Easily monitor your teen’s body mass index and compare it to healthy percentile ranges — all without downloading apps or guessing what’s “normal.”
🏫 School Nurses & Health Teachers
Use this tool to help students track BMI as part of physical health education or wellness check-ins.
💪 Coaches, Trainers & Youth Fitness Leaders
Assess a teen athlete’s weight category and general health trends to guide fitness plans or nutritional support.
At any stage of the teen years early adolescence to high school graduation this calculator helps start the conversation about health in a supportive, fact-based way.
Whether you are 13 or 17, understanding your body mass index is a smart step toward better health, and our BMI Calculator for Teens makes that step clear, simple, accurate and free.
No two bodies are alike, and that’s why BMI Count offers more than just one calculator. Explore our specialized tools, each built to match your age, gender, or health goals.
General BMI Calculator
Want a standard, all-purpose BMI tool that works for everyone?
👉 Use the BMI Calculator
For Men
Looking to better understand your BMI and body composition based reflect male muscle mass and calorie needs?
👉 Try the BMI Calculator for Men
For Women
Get results that reflect female-specific body composition and hormone factors.
👉 Check out our BMI Calculator for Women
For Kids
Get kids-friendly aged 2-12 insights that adjust for puberty and rapid growth stages.
👉 Try the BMI Calculator for Kids
For Senior Adults
Understand how BMI affects your health as metabolism and muscle mass change with age.
👉 Use the BMI Calculator for Seniors
No matter your age or life stage, BMI Count has a tool built to help you better understand your body and plan a healthier future.
A healthy BMI for teens typically falls between the 5th and 85th percentile on the CDC’s BMI-for-age growth chart. This range is adjusted based on the teen's age and gender, making it more accurate than adult BMI standards.
The BMI Calculator for Teens uses height and weight to compute body mass index, then compares it to national growth charts.
The formula is: BMI = weight (kg) / height (m²).
But for teens, the result is interpreted based on age- and gender-specific percentiles.
Teenagers are still growing, so their BMI is measured using percentiles that compare their height and weight to peers of the same age and gender. Adult BMI uses fixed categories, but teen BMI must account for rapid development.
It’s not recommended. Most general BMI calculators don’t account for a teen's age or gender, making them less accurate. A dedicated BMI Calculator for Teens, like the one from BMI Count, provides personalized, reliable results.
A teen is classified as overweight if their BMI is between the 85th and 95th percentile for their age and gender, according to CDC growth standards.
BMI is a useful screening tool to identify potential weight concerns but doesn’t measure body fat or muscle. That’s why it’s important to use it with other health indicators and discuss results with a doctor if needed.
Yes. Teens who are very athletic or muscular may have a higher body mass index even if they have low body fat. That’s why BMI should be viewed as part of a bigger health picture.
Yes! The BMI Calculator for Teens from BMI Count is 100% free to use. There’s no signup, no app to download, and no personal data is stored.
At BMI Count, we know how important it is for teens and parents to have access to clear, accurate health information. That’s why we created a tool that’s not just easy-to-use but is also grounded in trusted medical guidance from sources like the CDC and WHO.
Our free BMI Calculator for Teens gives you the numbers, context, and reassurance you need, without any hidden fees or complicated sign-ups.
No logins, no subscriptions, just real, personalized body mass index results built to support healthy habits during the most important years of development.
Take the first step toward better health awareness with our simple, accurate, and science-backed BMI Calculator for Teens.
👉 Instant Results, Completely Free, Tailored for Ages 13 to 17.
BMI Count is your trusted source for fast, accurate, and easy-to-use health calculators built to help you better understand your body, every day.
We offer a growing library of specialized BMI tools for all ages, genders, and unit systems. Whether you’re tracking your general BMI or using advanced metrics like BMR or ideal weight, our calculators are designed to give you results you can rely on instantly and without sign-up.
All tools on BMI Count are 100% free to use and based on medically recognized formulas. No subscriptions, no data tracking just helpful, science-backed health insights you can trust.