1. What is BMI for Teen Boys?

BMI-for-age is the measure of body fat based on a teen boy's weight and height relative to his age. For children and teens, BMI is age- and sex-specific and is often referred to as BMI-for-age.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula adjusted for teen boys:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in meters

Explanation: The result is compared against CDC growth charts for boys aged 13-19 to determine the percentile and weight category.

3. Importance of BMI Calculation

Details: BMI screening for teens can help identify potential weight problems that may lead to health issues. However, it's just one tool and should be used alongside other assessments.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, and exact age between 13-19 years. For accurate results, measurements should be taken with minimal clothing and no shoes.

5. Frequently Asked Questions (FAQ)

Q1: Why is BMI different for teens than adults?
A: Teens are still growing, so their BMI must be compared against others of the same age and sex using percentile ranges rather than fixed categories.

Q2: What are the percentile ranges for teen boys?
A: Underweight (<5th), Healthy weight (5th-85th), Overweight (85th-95th), Obese (≥95th percentile).

Q3: When should I be concerned about my teen's BMI?
A: Consult a healthcare provider if BMI is below 5th percentile or above 85th percentile, or if there are sudden changes.

Q4: Are there limitations to BMI for teens?
A: BMI doesn't distinguish between muscle and fat, so athletic teens may have higher BMI without excess fat.

Q5: How often should BMI be checked for teens?
A: Annual checks are typically sufficient unless there are specific health concerns.