BMI Percentile Calculator: For Ages 2 to 20

How It Works

This BMI percentile calculator estimates a child's place on Centers for Disease Control and Prevention growth charts. Centers for Disease Control and Prevention is often called CDC. Body Mass Index is often called BMI. It equals weight in kilograms divided by height in meters squared. The calculator matches BMI with age and gender curves. It returns a percentile and a weight status.

1. Enter age in years from 2 to 20.
2. Choose gender male or female.
3. Enter height in centimeters.
4. Enter weight in kilograms.
5. Press the Calculate BMI Percentile button.

Enter Your Details

Use these tips for each field.

• Age: Use years, decimals work like 7.5. Range is 2 to 20.
• Gender: Choose male or female. This sets the CDC curve.
• Height: Use centimeters. Range is 50 to 220 centimeters.
• Weight: Use kilograms. Range is 2 to 200 kilograms.

Instant Results

You get clear values in seconds.

• BMI: Shown in kg/m², rounded to one decimal.
• BMI Percentile: Shown to one decimal.
• Weight Status Category: Shown under the result.
• Chart: A chart with 5th and 50th and 85th and 95th percentile curves and a red dot.

Percentiles show how a child's BMI compares with peers of the same age and gender. Use these guides for the category labels.

• Underweight: Below the 5th percentile.
• Healthy Weight: From the 5th to below the 85th percentile.
• Overweight: From the 85th to below the 95th percentile.
• Obese: At or above the 95th percentile.

Benefits of the Calculator

Use this BMI percentile calculator for quick checks and simple tracking. It keeps the math clean and the steps short. You get a result you can read at a glance.

Quick and Straight to the Point

• Fast math using a standard BMI formula.
• Clear ranges help you enter data with confidence.
• Decimal ages improve match with CDC curves.
• Simple chart helps you explain the result to others.

A Health Boost for Everyone

• Parents who track growth between well visits.
• Clinics during intake and screening.
• Coaches who work with youth teams.
• Teachers and students during class work.

Limits and Data Notes

• The age range is 2 to 20 years.
• Units are centimeters for height and kilograms for weight.
• Curves use CDC points with smooth steps across ages.
• The chart shows four key curves for quick context.
• Use this tool for screening. A clinician provides diagnosis.
• Gender options are male and female.
• Convert inches and pounds to metric units before entry.

Why BMI Matters

BMI percentile adds age and gender context to BMI. It helps spot trends through childhood and teen years. CDC growth charts reflect data from children in the United States. For care decisions, speak with a pediatric clinician. Use BMI with other signs like growth history, diet, sleep, and activity.

Wrapping Up

The BMI Percentile Calculator gives a clear percentile, a category, and a helpful chart. Use it to track changes over time. Bring results to your next visit for a focused chat. Small steps today support steady growth over time.